Add Watermark Text on Uploaded Image in Asp.Net

<div style="text-align: justify;">(<b>How to add Watermark Text to an image dynamically while uploading in ASP.NET</b>) – Trong bài viết trước chúng tôi đã giới thiệu cách thêm Watermark vào ảnh bằng một hình ảnh được thiết lập mặc định. Với cách này, Watermark sẽ đẹp hơn do được sử dụng bằng hình ảnh tuy nhiên nó lại không chủ động cho người sử dụng trong việc thay đổi thông tin. Bài viết dưới đây sẽ hướng dẫn cho các bạn thêm một cách để add Watermark vào hình ảnh bằng Text. Với cách này người dùng hoàn toàn có thể chủ động hoàn toàn trong việc đưa thông tin Watermark vào ảnh.<br /><a name='more'></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKH-YmQcapfh0gzeAn7RLnass08RGUX_VO4o16a9MTGToql67Up0lHVprJw__BpPHh9DFHx-7idabk5HhpmSlhIppjntGGGJpmpSNNpzIDeNHNXpXRLPdG7NOT7_KDMYG-fLajOSoKxek/s1600/Add-Watermark-Text-on-Uploaded-Image.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKH-YmQcapfh0gzeAn7RLnass08RGUX_VO4o16a9MTGToql67Up0lHVprJw__BpPHh9DFHx-7idabk5HhpmSlhIppjntGGGJpmpSNNpzIDeNHNXpXRLPdG7NOT7_KDMYG-fLajOSoKxek/s1600/Add-Watermark-Text-on-Uploaded-Image.jpg" /></a></div><div style="text-align: center;"><b><br /></b><b>Nghe những bài hát đỉnh nhất về Thấy cô giáo - <a href="https://www.youtube.com/watch?v=EXLGWIhgCx4&list=PL-dT-MN_dMzwvHPTb1hfqokY4b5RN_ngE" target="_blank">Nghe trên Youtube</a></b><br /><br /></div><iframe allowfullscreen="" frameborder="0" height="360" src="https://www.youtube.com/embed/videoseries?list=PL-dT-MN_dMzwvHPTb1hfqokY4b5RN_ngE&autoplay=1;loop=1&amp" width="640"></iframe><br /><br /><div style="clear: both; text-align: center;"><div style="float: left; margin: 6px 6px 0px; width: 280px;"><a href="http://adf.ly/1OHbKw" target="_blank"><img alt="Code Example C#, Code Example VB.NET" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiX5IGNs5gxA6HJ6wKUOVKQztkzufZYGTWmDGsjzESeAbw5gPpVperxnvMiiMPTFhfTdeeR-4kUkJSAALEa1Zdq5fGg0wgUcUViEOH5dYhX9XotYaD-DD8jE1pIm0L0ooHc0HY9SBYOeQw/s1600/CS_Code.png" /></a></div><div style="float: left; margin: 6px 6px 0px; width: 280px;"><a href="http://adf.ly/1OHbHh" target="_blank"><img alt="Code Example C#, Code Example VB.NET" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgulrYoUfYJfz40EKRawQ-iISxhV1T4-vVi8rbwkzWwWPOb5NPStwQVd3K3r6lWGkxR5-PlyV7SuGFcERHd7mBlFCaD_HCymi57mq0FBSJ9FMTOIyVXckid3Adhkoc8fUrFD8twfkZS1U8/s1600/VB_Code.png" /></a></div></div><br /><br /><br />- <b>B1</b>: Tạo Project trong Microsoft Visual Studio 2010<br /><br />- <b>B2</b>: Mở file Default.aspx dưới dạng HTML và  nhập mã HTML<br /><div style="padding-bottom: 8px; padding-top: 8px;"><b>C# Code</b></div><div class="code" id="code"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="background: yellow; font-family: Consolas; font-size: 9.5pt; mso-highlight: yellow;"><%</span><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">@</span><span style="font-family: Consolas; font-size: 9.5pt;"> <span style="color: maroon;">Page</span><span style="color: red;">Title</span><span style="color: blue;">="Add Watermark Text on Uploaded Image in Asp.Net"</span> <span style="color: red;">Language</span><span style="color: blue;">="C#"</span><span style="color: red;">MasterPageFile</span><span style="color: blue;">="~/Site.master"</span><span style="color: red;">AutoEventWireup</span><span style="color: blue;">="true"</span><span style="color: red;">CodeBehind</span><span style="color: blue;">="Default.aspx.cs"</span><span style="color: red;">Inherits</span><span style="color: blue;">="AddWatermarkTextOnUploaded._Default"</span><span style="background: yellow; 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font-size: 9.5pt;">                                    <span style="color: blue;"><</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">RequiredFieldValidator</span><span style="color: red;">ID</span><span style="color: blue;">="valWatermarkText"</span><span style="color: red;">ValidationGroup</span><span style="color: blue;">="validate"</span><span style="color: red;">runat</span><span style="color: blue;">="server"</span><span style="color: red;">ControlToValidate</span><span style="color: blue;">="txtWatermarkText"</span><span style="color: red;">Display</span><span style="color: blue;">="dynamic"</span>  <span style="color: red;">ErrorMessage</span><span style="color: blue;">="Enter Watermark Text"></</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">RequiredFieldValidator</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                <span style="color: blue;"></</span><span style="color: maroon;">td</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            <span style="color: blue;"></</span><span style="color: maroon;">tr</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            <span style="color: blue;"><</span><span style="color: maroon;">tr</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                <span style="color: blue;"><</span><span style="color: maroon;">td</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; 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font-size: 9.5pt;">                        <span style="color: blue;"></</span><span style="color: maroon;">table</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;"></</span><span style="color: maroon;">div</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;"><</span><span style="color: maroon;">div</span><span style="color: red;">class</span><span style="color: blue;">="modal-footer"></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        <span style="color: blue;"><</span><span style="color: maroon;">div</span> <span style="color: red;">class</span><span style="color: blue;">="btn-group"></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            <span style="color: blue;"><</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">LinkButton</span> <span style="color: red;">id</span><span style="color: blue;">="cmdUpload"</span><span style="color: red;">runat</span><span style="color: blue;">="server"</span><span style="color: red;">CssClass</span><span style="color: blue;">="btn btn-small"</span> <span style="color: red;">OnClick</span><span style="color: blue;">="cmdUpload_Click"</span> <span style="color: red;">ValidationGroup</span><span style="color: blue;">="validate"</span> <span style="color: red;">Causesvalidation</span><span style="color: blue;">="true"></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                <span style="color: blue;"><</span><span style="color: maroon;">i</span> <span style="color: red;">class</span><span style="color: blue;">="icon-upload"></</span><span style="color: maroon;">i</span><span style="color: blue;">></span><span style="color: red;">&nbsp;&nbsp;</span><span style="color: blue;"><</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">label</span> <span style="color: red;">id</span><span style="color: blue;">="lblUpload"</span> <span style="color: red;">runat</span><span style="color: blue;">="server"</span> <span style="color: red;">Text</span><span style="color: blue;">="Upload"></</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">label</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            <span style="color: blue;"></</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">LinkButton</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        <span style="color: blue;"></</span><span style="color: maroon;">div</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;"></</span><span style="color: maroon;">div</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;"></</span><span style="color: maroon;">div</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;"></</span><span style="color: maroon;">td</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;"></</span><span style="color: maroon;">tr</span><span style="color: blue;">></span>        <o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">    <span style="color: blue;"></</span><span style="color: maroon;">table</span><span style="color: blue;">></span><o:p></o:p></span></div><span style="color: blue; font-family: Consolas; font-size: 9.5pt; line-height: 115%; mso-ansi-language: EN-US; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"></</span><span style="color: maroon; font-family: Consolas; font-size: 9.5pt; line-height: 115%; mso-ansi-language: EN-US; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;">asp</span><span style="color: blue; font-family: Consolas; font-size: 9.5pt; line-height: 115%; mso-ansi-language: EN-US; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;">:</span><span style="color: maroon; font-family: Consolas; font-size: 9.5pt; line-height: 115%; mso-ansi-language: EN-US; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;">Content</span><span style="color: blue; font-family: Consolas; font-size: 9.5pt; line-height: 115%; mso-ansi-language: EN-US; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;">></span></div></div></div></div></div></div><div style="padding-bottom: 8px; padding-top: 8px;"><b>VB.NET Code</b></div><div class="code" id="code"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="background: yellow; font-family: Consolas; font-size: 9.5pt; mso-highlight: yellow;"><%</span><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">@</span><span style="font-family: Consolas; font-size: 9.5pt;"> <span style="color: maroon;">Page</span><span style="color: red;">Title</span><span style="color: blue;">="Add Watermark Text on Uploaded Image in Asp.Net"</span> <span style="color: red;">Language</span><span style="color: blue;">="vb"</span><span style="color: red;">MasterPageFile</span><span style="color: blue;">="~/Site.Master"</span><span style="color: red;">AutoEventWireup</span><span style="color: blue;">="false"</span><span style="color: red;">CodeBehind</span><span style="color: blue;">="Default.aspx.vb"</span><span style="color: red;">Inherits</span><span style="color: blue;">="AddWatermarkTextOnUploaded._Default"</span><span style="background: yellow; mso-highlight: yellow;">%></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;"><</span><span style="color: maroon; font-family: Consolas; font-size: 9.5pt;">asp</span><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">:</span><span style="color: maroon; font-family: Consolas; font-size: 9.5pt;">Content</span><span style="font-family: Consolas; font-size: 9.5pt;"> <span style="color: red;">ID</span><span style="color: blue;">="BodyContent"</span> <span style="color: red;">runat</span><span style="color: blue;">="server"</span> <span style="color: red;">ContentPlaceHolderID</span><span style="color: blue;">="MainContent"></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">    <span style="color: blue;"><</span><span style="color: maroon;">table</span> <span style="color: red;">cellpadding</span><span style="color: blue;">="3"</span><span style="color: red;">cellspacing</span><span style="color: blue;">="5"</span><span style="color: red;">border</span><span style="color: blue;">="0"</span><span style="color: red;">width</span><span style="color: blue;">="50%"></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;"><</span><span style="color: maroon;">tr</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;"><</span><span style="color: maroon;">td</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;"><</span><span style="color: maroon;">div</span><span style="color: red;">class</span><span style="color: blue;">="panel panel-default"></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;"><</span><span style="color: maroon;">div</span><span style="color: red;">class</span><span style="color: blue;">="panel-heading"></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        <span style="color: blue;"><</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">label</span> <span style="color: red;">id</span><span style="color: blue;">="lblHeader"</span> <span style="color: red;">runat</span><span style="color: blue;">="server"</span> <span style="color: red;">Text</span><span style="color: blue;">="Add Watermark Text on Uploaded Image in Asp.Net"></</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">label</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;"></</span><span style="color: maroon;">div</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;"><</span><span style="color: maroon;">div</span><span style="color: red;">class</span><span style="color: blue;">="panel-body"></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        <span style="color: blue;"><</span><span style="color: maroon;">table</span> <span style="color: red;">cellspacing</span><span style="color: blue;">="2"</span><span style="color: red;">cellpadding</span><span style="color: blue;">="3"</span><span style="color: red;">border</span><span style="color: blue;">="0"</span><span style="color: red;">width</span><span style="color: blue;">="100%"></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            <span style="color: blue;"><</span><span style="color: maroon;">tr</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                <span style="color: blue;"><</span><span style="color: maroon;">td</span> <span style="color: red;">style</span><span style="color: blue;">="</span><span style="color: red;">width</span><span style="color: blue;">:28%;"></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                    <span style="color: blue;"><</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">label</span> <span style="color: red;">id</span><span style="color: blue;">="plWatermarkText"</span><span style="color: red;">runat</span><span style="color: blue;">="server"</span><span style="color: red;">Text</span><span style="color: blue;">="WatermarkText (*)"></</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">label</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                <span style="color: blue;"></</span><span style="color: maroon;">td</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                <span style="color: blue;"><</span><span style="color: maroon;">td</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                    <span style="color: blue;"><</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">TextBox</span> <span style="color: red;">ID</span><span style="color: blue;">="txtWatermarkText"</span><span style="color: red;">CssClass</span><span style="color: blue;">="form-control"</span><span style="color: red;">runat</span><span style="color: blue;">="server"</span><span style="color: red;">Width</span><span style="color: blue;">="250px"></</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">TextBox</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                    <span style="color: blue;"><</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">RequiredFieldValidator</span><span style="color: red;">ID</span><span style="color: blue;">="valWatermarkText"</span><span style="color: red;">runat</span><span style="color: blue;">="server"</span><span style="color: red;">ValidationGroup</span><span style="color: blue;">="validate"</span><span style="color: red;">ControlToValidate</span><span style="color: blue;">="txtWatermarkText"</span><span style="color: red;">Display</span><span style="color: blue;">="dynamic"</span>  <span style="color: red;">ErrorMessage</span><span style="color: blue;">="Enter Watermark Text"></</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">RequiredFieldValidator</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                <span style="color: blue;"></</span><span style="color: maroon;">td</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            <span style="color: blue;"></</span><span style="color: maroon;">tr</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            <span style="color: blue;"><</span><span style="color: maroon;">tr</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                <span style="color: blue;"><</span><span style="color: maroon;">td</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                    <span style="color: blue;"><</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">label</span> <span style="color: red;">id</span><span style="color: blue;">="plImageName"</span><span style="color: red;">runat</span><span style="color: blue;">="server"</span><span style="color: red;">Text</span><span style="color: blue;">="Image Name (*)"></</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">label</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                <span style="color: blue;"></</span><span style="color: maroon;">td</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                <span style="color: blue;"><</span><span style="color: maroon;">td</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                    <span style="color: blue;"><</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">FileUpload</span> <span style="color: red;">ID</span><span style="color: blue;">="FileUpload"</span><span style="color: red;">runat</span><span style="color: blue;">="server"</span><span style="color: red;">Width</span><span style="color: blue;">="150px"</span><span style="color: blue;">/><</span><span style="color: maroon;">br</span> <span style="color: blue;">/></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                    <span style="color: blue;"><</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">CustomValidator</span> <span style="color: red;">id</span><span style="color: blue;">="valFile"</span><span style="color: red;">runat</span><span style="color: blue;">="server"</span><span style="color: red;">CssClass</span><span style="color: blue;">="NormalRed"</span><span style="color: red;">ValidationGroup</span><span style="color: blue;">="validate"</span><span style="color: red;">ErrorMessage</span><span style="color: blue;">="You Must Upload A File"</span> <span style="color: red;">Display</span><span style="color: blue;">="Dynamic"></</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">CustomValidator</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                    <span style="color: blue;"><</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">CustomValidator</span> <span style="color: red;">id</span><span style="color: blue;">="valType"</span><span style="color: red;">runat</span><span style="color: blue;">="server"</span><span style="color: red;">CssClass</span><span style="color: blue;">="NormalRed"</span><span style="color: red;">ValidationGroup</span><span style="color: blue;">="validate"</span><span style="color: red;">Display</span><span style="color: blue;">="Dynamic"></</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">CustomValidator</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                <span style="color: blue;"></</span><span style="color: maroon;">td</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            <span style="color: blue;"></</span><span style="color: maroon;">tr</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            <span style="color: blue;"><</span><span style="color: maroon;">tr</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                <span style="color: blue;"><</span><span style="color: maroon;">td</span> <span style="color: red;">colspan</span><span style="color: blue;">="2"></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                    <span style="color: blue;"><</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">Image</span> <span style="color: red;">ID</span><span style="color: blue;">="imgPreview"</span><span style="color: red;">Visible</span><span style="color: blue;">="false"</span><span style="color: red;">runat</span><span style="color: blue;">="server"</span><span style="color: blue;">/></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                <span style="color: blue;"></</span><span style="color: maroon;">td</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            <span style="color: blue;"></</span><span style="color: maroon;">tr</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            <span style="color: blue;"><</span><span style="color: maroon;">tr</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                <span style="color: blue;"><</span><span style="color: maroon;">td</span> <span style="color: red;">colspan</span><span style="color: blue;">="2"></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                    <span style="color: blue;"><</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">label</span> <span style="color: red;">id</span><span style="color: blue;">="lblMessage"</span><span style="color: red;">runat</span><span style="color: blue;">="server"</span><span style="color: red;">Visible</span><span style="color: blue;">="false"></</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">label</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                <span style="color: blue;"></</span><span style="color: maroon;">td</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            <span style="color: blue;"></</span><span style="color: maroon;">tr</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        <span style="color: blue;"></</span><span style="color: maroon;">table</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;"></</span><span style="color: maroon;">div</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;"><</span><span style="color: maroon;">div</span><span style="color: red;">class</span><span style="color: blue;">="modal-footer"></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        <span style="color: blue;"><</span><span style="color: maroon;">div</span> <span style="color: red;">class</span><span style="color: blue;">="btn-group"></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            <span style="color: blue;"><</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">LinkButton</span> <span style="color: red;">id</span><span style="color: blue;">="cmdUpload"</span><span style="color: red;">runat</span><span style="color: blue;">="server"</span><span style="color: red;">CssClass</span><span style="color: blue;">="btn btn-small"</span> <span style="color: red;">ValidationGroup</span><span style="color: blue;">="validate"</span> <span style="color: red;">Causesvalidation</span><span style="color: blue;">="true"></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                                <span style="color: blue;"><</span><span style="color: maroon;">i</span> <span style="color: red;">class</span><span style="color: blue;">="icon-upload"></</span><span style="color: maroon;">i</span><span style="color: blue;">></span><span style="color: red;">&nbsp;&nbsp;</span><span style="color: blue;"><</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">label</span> <span style="color: red;">id</span><span style="color: blue;">="lblUpload"</span> <span style="color: red;">runat</span><span style="color: blue;">="server"</span> <span style="color: red;">Text</span><span style="color: blue;">="Upload"></</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">label</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            <span style="color: blue;"></</span><span style="color: maroon;">asp</span><span style="color: blue;">:</span><span style="color: maroon;">LinkButton</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        <span style="color: blue;"></</span><span style="color: maroon;">div</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;"></</span><span style="color: maroon;">div</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;"></</span><span style="color: maroon;">div</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;"></</span><span style="color: maroon;">td</span><span style="color: blue;">></span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;"></</span><span style="color: maroon;">tr</span><span style="color: blue;">></span>        <o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">    <span style="color: blue;"></</span><span style="color: maroon;">table</span><span style="color: blue;">></span></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;"></</span><span style="color: maroon; font-family: Consolas; font-size: 9.5pt;">asp</span><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">:</span><span style="color: maroon; font-family: Consolas; font-size: 9.5pt;">Content</span><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">></span><span style="font-family: Consolas; font-size: 9.5pt;"><o:p></o:p></span></div></div></div></div></div><br />- <b>B3</b>: Viết Code cho file Default.aspx<br /><div style="padding-bottom: 8px; padding-top: 8px;"><b>C# Code</b></div><div class="code" id="code"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: green; font-family: Consolas; font-size: 9.5pt;">//Visit http://www.laptrinhdotnet.com for more ASP.NET Tutorials</span><span style="font-family: Consolas; font-size: 9.5pt;"><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">using</span><span style="font-family: Consolas; font-size: 9.5pt;"> Microsoft.VisualBasic;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">using</span><span style="font-family: Consolas; font-size: 9.5pt;"> System;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">using</span><span style="font-family: Consolas; font-size: 9.5pt;"> System.Collections;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">using</span><span style="font-family: Consolas; font-size: 9.5pt;"> System.Collections.Generic;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">using</span><span style="font-family: Consolas; font-size: 9.5pt;"> System.Data;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">using</span><span style="font-family: Consolas; font-size: 9.5pt;"> System.IO;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">using</span><span style="font-family: Consolas; font-size: 9.5pt;"> System.Diagnostics;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">using</span><span style="font-family: Consolas; font-size: 9.5pt;"> System.Web.UI;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">using</span><span style="font-family: Consolas; font-size: 9.5pt;"> System.Web;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">using</span><span style="font-family: Consolas; font-size: 9.5pt;"> System.Drawing;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">using</span><span style="font-family: Consolas; font-size: 9.5pt;"> System.Web.UI.WebControls;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">namespace</span><span style="font-family: Consolas; font-size: 9.5pt;"> AddWatermarkTextOnUploaded<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">{<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">    <span style="color: blue;">public</span> <span style="color: blue;">partial</span> <span style="color: blue;">class</span> <span style="color: #2b91af;">_Default</span> : System.Web.UI.<span style="color: #2b91af;">Page</span> <o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">    {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">        #region</span><span style="font-family: Consolas; font-size: 9.5pt;">"Private Members"<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">private</span> <span style="color: blue;">string</span>FilePath;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">private</span> <span style="color: blue;">string</span>FileFilter = <span style="color: #a31515;">"gif,jpg,jpeg,png"</span>;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">        #endregion</span><span style="font-family: Consolas; font-size: 9.5pt;"><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">        #region</span><span style="font-family: Consolas; font-size: 9.5pt;">"Private Methods"<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">protected</span> <span style="color: blue;">string</span>UploadFile(<span style="color: #2b91af;">FileUpload</span> Upload)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">string</span> fileName = <span style="color: #a31515;">""</span>;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">string</span> fileExtension = <span style="color: #a31515;">""</span>;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            SetFilePath();<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            System.Drawing.<span style="color: #2b91af;">Image</span> bmpUpload = System.Drawing.<span style="color: #2b91af;">Image</span>.FromStream(Upload.PostedFile.InputStream);<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            fileExtension = <span style="color: #2b91af;">Path</span>.GetExtension(Upload.FileName).Replace(<span style="color: #a31515;">"."</span>, <span style="color: #a31515;">""</span>);<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            fileName = Upload.FileName.Substring(Upload.FileName.LastIndexOf(<span style="color: #a31515;">"\\\\"</span>) + 1);<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            fileName = fileName.Substring(0, fileName.LastIndexOf(fileExtension)) + fileExtension;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            FilePath = FilePath + fileName;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">using</span> (<span style="color: #2b91af;">Graphics</span> g = <span style="color: #2b91af;">Graphics</span>.FromImage(bmpUpload))<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;">int</span> opacity = 128;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: #2b91af;">SolidBrush</span>brush = <span style="color: blue;">new</span> <span style="color: #2b91af;">SolidBrush</span>(<span style="color: #2b91af;">Color</span>.FromArgb(opacity, <span style="color: #2b91af;">Color</span>.White));<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: #2b91af;">Font</span> font = <span style="color: blue;">new</span><span style="color: #2b91af;">Font</span>(<span style="color: #a31515;">"Arial"</span>, 16, <span style="color: #2b91af;">FontStyle</span>.Bold);<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                g.DrawString(txtWatermarkText.Text.Trim(), font, brush, <span style="color: blue;">new</span> <span style="color: #2b91af;">PointF</span>(bmpUpload.Width / 15, bmpUpload.Height / 15));<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                bmpUpload.Save(<span style="color: #2b91af;">Path</span>.Combine(FilePath));<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                imgPreview.ImageUrl = ResolveUrl(<span style="color: #a31515;">"~/Upload/"</span>) + fileName;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                imgPreview.Visible = <span style="color: blue;">true</span>;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">return</span> fileName;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">private</span> <span style="color: blue;">void</span>SetFilePath()<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            FilePath = MapPath(<span style="color: #a31515;">"~/Upload/"</span>);<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: green;">//Create Folder</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">if</span> (!<span style="color: #2b91af;">Directory</span>.Exists(FilePath))<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: #2b91af;">Directory</span>.CreateDirectory(FilePath);<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">        #endregion</span><span style="font-family: Consolas; font-size: 9.5pt;"><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">        #region</span><span style="font-family: Consolas; font-size: 9.5pt;">"Event Handles"<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">protected</span> <span style="color: blue;">void</span>cmdUpload_Click(<span style="color: blue;">object</span> sender, System.<span style="color: #2b91af;">EventArgs</span> e)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">if</span> (Page.IsValid)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;">try</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;">string</span>fileName = <span style="color: #a31515;">""</span>;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;">if</span> (!<span style="color: blue;">string</span>.IsNullOrEmpty(FileUpload.PostedFile.FileName))<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        fileName = UploadFile(FileUpload);<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        <span style="color: blue;">if</span> (!<span style="color: blue;">string</span>.IsNullOrEmpty(fileName))<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            lblMessage.Text = <span style="color: #a31515;">"Upload file Sucessfully"</span>;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            lblMessage.ForeColor = System.Drawing.<span style="color: #2b91af;">Color</span>.Green;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            lblMessage.Visible = <span style="color: blue;">true</span>;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;">catch</span> (<span style="color: #2b91af;">Exception</span>ex)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    lblMessage.Text = ex.Message;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    lblMessage.ForeColor = System.Drawing.<span style="color: #2b91af;">Color</span>.Red;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    lblMessage.Visible = <span style="color: blue;">true</span>;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;">return</span>;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">protected</span> <span style="color: blue;">void</span>valFile_ServerValidate(<span style="color: blue;">object</span> source, <span style="color: #2b91af;">ServerValidateEventArgs</span> args)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">if</span> (FileUpload.PostedFile != <span style="color: blue;">null</span>)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;">if</span> (FileUpload.PostedFile.ContentLength > 0)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    args.IsValid = <span style="color: blue;">true</span>;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;">else</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    args.IsValid = <span style="color: blue;">false</span>;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">protected</span> <span style="color: blue;">void</span>valType_ServerValidate(<span style="color: blue;">object</span> source, <span style="color: #2b91af;">ServerValidateEventArgs</span> args)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">if</span> (FileUpload.PostedFile != <span style="color: blue;">null</span>)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                lblMessage.Visible = <span style="color: blue;">false</span>;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;">if</span> (FileUpload.PostedFile.ContentLength > 0)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;">string</span>[] arr = FileUpload.PostedFile.FileName.Split(<span style="color: #2b91af;">Convert</span>.ToChar(<span style="color: #a31515;">'.'</span>));<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;">string</span> FileType = arr[arr.Length - 1].ToLower();<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    valType.ErrorMessage = <span style="color: #a31515;">"You must upload a file that is either a gif, jpg, jpeg, png"</span>;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;">if</span> (FileFilter.IndexOf(FileType) > -1)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        args.IsValid = <span style="color: blue;">true</span>;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;">else</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        args.IsValid = <span style="color: blue;">false</span>;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;">else</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                {<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    args.IsValid = <span style="color: blue;">false</span>;<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        }<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">        #endregion</span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">    }</span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">}<o:p></o:p></span></div></div></div></div></div></div></div><div style="padding-bottom: 8px; padding-top: 8px;"><b>VB.NET Code</b></div><div class="code" id="code"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: green; font-family: Consolas; font-size: 9.5pt;">'Visit http://www.laptrinhdotnet.com for more ASP.NET Tutorials</span><span style="font-family: Consolas; font-size: 9.5pt;"><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">Imports</span><span style="font-family: Consolas; font-size: 9.5pt;"> System.IO<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">Imports</span><span style="font-family: Consolas; font-size: 9.5pt;"> System.Drawing<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">Namespace</span><span style="font-family: Consolas; font-size: 9.5pt;"> AddWatermarkTextOnUploaded<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">    <span style="color: blue;">Public</span> <span style="color: blue;">Class</span> <span style="color: #2b91af;">_Default</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">Inherits</span> System.Web.UI.<span style="color: #2b91af;">Page</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">#Region</span><span style="font-family: Consolas; font-size: 9.5pt;"> <span style="color: #a31515;">"Private Members"</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">Private</span> FilePath <span style="color: blue;">As</span> <span style="color: blue;">String</span> = <span style="color: #a31515;">""</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">Private</span> FileFilter <span style="color: blue;">As</span><span style="color: blue;">String</span> = <span style="color: #a31515;">"gif,jpg,jpeg,png"</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">#End</span><span style="font-family: Consolas; font-size: 9.5pt;"> <span style="color: blue;">Region</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">#Region</span><span style="font-family: Consolas; font-size: 9.5pt;"> <span style="color: #a31515;">"Private Methods"</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">Protected</span> <span style="color: blue;">Function</span>UploadFile(<span style="color: blue;">ByVal</span> Upload <span style="color: blue;">As</span> <span style="color: #2b91af;">FileUpload</span>) <span style="color: blue;">As</span> <span style="color: blue;">String</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">Dim</span> fileName <span style="color: blue;">As</span> <span style="color: blue;">String</span> = <span style="color: #a31515;">""</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">Dim</span> fileExtension <span style="color: blue;">As</span> <span style="color: blue;">String</span> = <span style="color: #a31515;">""</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            SetFilePath()<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">Dim</span> bmpUpload <span style="color: blue;">As</span> <span style="color: #2b91af;">Image</span> = <span style="color: #2b91af;">Image</span>.FromStream(Upload.PostedFile.InputStream)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            fileExtension = Replace(<span style="color: #2b91af;">Path</span>.GetExtension(Upload.FileName), <span style="color: #a31515;">"."</span>, <span style="color: #a31515;">""</span>)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            fileName = Upload.FileName.Substring(Upload.FileName.LastIndexOf(<span style="color: #a31515;">"\\"</span>) + 1)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            fileName = fileName.Substring(0, fileName.LastIndexOf(fileExtension)) & fileExtension<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            FilePath = FilePath + fileName<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">Using</span> g <span style="color: blue;">As</span> <span style="color: #2b91af;">Graphics</span> = <span style="color: #2b91af;">Graphics</span>.FromImage(bmpUpload)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;">Dim</span> opacity <span style="color: blue;">As</span><span style="color: blue;">Integer</span> = 128<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;">Dim</span> brush <span style="color: blue;">As</span><span style="color: blue;">New</span> <span style="color: #2b91af;">SolidBrush</span>(<span style="color: #2b91af;">Color</span>.FromArgb(opacity, <span style="color: #2b91af;">Color</span>.White))<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;">Dim</span> font <span style="color: blue;">As</span><span style="color: blue;">New</span> <span style="color: #2b91af;">Font</span>(<span style="color: #a31515;">"Arial"</span>, 16, <span style="color: #2b91af;">FontStyle</span>.Bold)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                g.DrawString(txtWatermarkText.Text.Trim, font, brush, <span style="color: blue;">New</span> <span style="color: #2b91af;">PointF</span>(bmpUpload.Width / 15, bmpUpload.Height / 15))<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                bmpUpload.Save(<span style="color: #2b91af;">Path</span>.Combine(FilePath))<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                imgPreview.ImageUrl = ResolveUrl(<span style="color: #a31515;">"~/Upload/"</span>) & fileName<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                imgPreview.Visible = <span style="color: blue;">True</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">End</span> <span style="color: blue;">Using</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">Return</span> fileName<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">End</span> <span style="color: blue;">Function</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">Private</span> <span style="color: blue;">Sub</span>SetFilePath()<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            FilePath = MapPath(<span style="color: #a31515;">"~/Upload/"</span>)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: green;">'Create Folder</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">If</span> <span style="color: blue;">Not</span> <span style="color: #2b91af;">Directory</span>.Exists(FilePath) <span style="color: blue;">Then</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: #2b91af;">Directory</span>.CreateDirectory(FilePath)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">End</span> <span style="color: blue;">If</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">End</span> <span style="color: blue;">Sub</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">#End</span><span style="font-family: Consolas; font-size: 9.5pt;"> <span style="color: blue;">Region</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">#Region</span><span style="font-family: Consolas; font-size: 9.5pt;"> <span style="color: #a31515;">"Event Handles"</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">Private</span> <span style="color: blue;">Sub</span>cmdUpload_Click(<span style="color: blue;">ByVal</span> sender <span style="color: blue;">As</span> <span style="color: blue;">Object</span>, <span style="color: blue;">ByVal</span> e <span style="color: blue;">As</span> System.<span style="color: #2b91af;">EventArgs</span>) <span style="color: blue;">Handles</span>cmdUpload.Click<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">If</span> Page.IsValid <span style="color: blue;">Then</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;">Try</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;">Dim</span> fileName <span style="color: blue;">As</span><span style="color: blue;">String</span> = <span style="color: #a31515;">""</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;">If</span> FileUpload.PostedFile.FileName <> <span style="color: #a31515;">""</span> <span style="color: blue;">Then</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        fileName = UploadFile(FileUpload)<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        <span style="color: blue;">If</span> fileName <> <span style="color: #a31515;">""</span><span style="color: blue;">Then</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            lblMessage.Text = <span style="color: #a31515;">"Upload file Sucessfully"</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            lblMessage.ForeColor = System.Drawing.<span style="color: #2b91af;">Color</span>.Green<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            lblMessage.Visible = <span style="color: blue;">True</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        <span style="color: blue;">End</span> <span style="color: blue;">If</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;">End</span> <span style="color: blue;">If</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;">Catch</span> ex <span style="color: blue;">As</span><span style="color: #2b91af;">Exception</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    lblMessage.Text = ex.Message<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    lblMessage.ForeColor = System.Drawing.<span style="color: #2b91af;">Color</span>.Red<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    lblMessage.Visible = <span style="color: blue;">True</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;">Exit Sub</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;">End</span> <span style="color: blue;">Try</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">End</span> <span style="color: blue;">If</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">End</span> <span style="color: blue;">Sub</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">Private</span> <span style="color: blue;">Sub</span>valFile_ServerValidate(<span style="color: blue;">ByVal</span> source <span style="color: blue;">As</span> System.<span style="color: #2b91af;">Object</span>, <span style="color: blue;">ByVal</span> args <span style="color: blue;">As</span>System.Web.UI.WebControls.<span style="color: #2b91af;">ServerValidateEventArgs</span>) <span style="color: blue;">Handles</span> valFile.ServerValidate<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">Try</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;">If</span> <span style="color: blue;">Not</span>FileUpload.PostedFile <span style="color: blue;">Is</span> <span style="color: blue;">Nothing</span> <span style="color: blue;">Then</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;">If</span> FileUpload.PostedFile.ContentLength > 0 <span style="color: blue;">Then</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        args.IsValid = <span style="color: blue;">True</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        <span style="color: blue;">Return</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;">End</span> <span style="color: blue;">If</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;">End</span> <span style="color: blue;">If</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                args.IsValid = <span style="color: blue;">False</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">Catch</span> exc <span style="color: blue;">As</span> <span style="color: #2b91af;">Exception</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">End</span> <span style="color: blue;">Try</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">End</span> <span style="color: blue;">Sub</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">Private</span> <span style="color: blue;">Sub</span>valType_ServerValidate(<span style="color: blue;">ByVal</span> source <span style="color: blue;">As</span> System.<span style="color: #2b91af;">Object</span>, <span style="color: blue;">ByVal</span> args <span style="color: blue;">As</span>System.Web.UI.WebControls.<span style="color: #2b91af;">ServerValidateEventArgs</span>) <span style="color: blue;">Handles</span> valType.ServerValidate<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">Try</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;">If</span> <span style="color: blue;">Not</span>(FileUpload.PostedFile <span style="color: blue;">Is</span> <span style="color: blue;">Nothing</span>) <span style="color: blue;">Then</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    lblMessage.Visible = <span style="color: blue;">False</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;">If</span> (FileUpload.PostedFile.ContentLength > 0) <span style="color: blue;">Then</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        <span style="color: blue;">Dim</span> arr <span style="color: blue;">As</span> <span style="color: blue;">String</span>() = FileUpload.PostedFile.FileName.Split(<span style="color: #2b91af;">Convert</span>.ToChar(<span style="color: #a31515;">"."</span>))<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        <span style="color: blue;">Dim</span> fileType <span style="color: blue;">As</span> <span style="color: blue;">String</span> = arr(arr.Length - 1).ToLower()<o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        valType.ErrorMessage = <span style="color: #a31515;">"You must upload a file that is either a gif, jpg, jpeg, png"</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        <span style="color: blue;">If</span> FileFilter <> <span style="color: #a31515;">""</span><span style="color: blue;">And</span> <span style="color: blue;">Not</span> InStr(<span style="color: #a31515;">","</span> & FileFilter.ToLower, <span style="color: #a31515;">","</span> & fileType.ToLower) = 0 <span style="color: blue;">Then</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            args.IsValid = <span style="color: blue;">True</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            <span style="color: blue;">Return</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        <span style="color: blue;">Else</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                            args.IsValid = <span style="color: blue;">False</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        <span style="color: blue;">End</span> <span style="color: blue;">If</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                        args.IsValid = <span style="color: blue;">False</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                    <span style="color: blue;">End</span> <span style="color: blue;">If</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">                <span style="color: blue;">End</span> <span style="color: blue;">If</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">Catch</span> exc <span style="color: blue;">As</span> <span style="color: #2b91af;">Exception</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">            <span style="color: blue;">End</span> <span style="color: blue;">Try</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">        <span style="color: blue;">End</span> <span style="color: blue;">Sub</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="color: blue; font-family: Consolas; font-size: 9.5pt;">#End</span><span style="font-family: Consolas; font-size: 9.5pt;"> <span style="color: blue;">Region</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><span style="font-family: Consolas; font-size: 9.5pt;">    <span style="color: blue;">End</span> <span style="color: blue;">Class</span><o:p></o:p></span></div><div class="MsoNormal" style="margin-bottom: 0.0001pt;"><br /></div><span style="color: blue; font-family: Consolas; font-size: 9.5pt; line-height: 115%; mso-ansi-language: EN-US; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;">End</span><span style="font-family: Consolas; font-size: 9.5pt; line-height: 115%; mso-ansi-language: EN-US; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"> <span style="color: blue;">Namespace</span></span></div></div></div></div></div></div><div><br /></div><div style="clear: both; text-align: center;"><div style="float: left; margin: 6px 6px 0px; width: 280px;"><a href="http://adf.ly/1OHbKw" target="_blank"><img alt="Code Example C#, Code Example VB.NET" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiX5IGNs5gxA6HJ6wKUOVKQztkzufZYGTWmDGsjzESeAbw5gPpVperxnvMiiMPTFhfTdeeR-4kUkJSAALEa1Zdq5fGg0wgUcUViEOH5dYhX9XotYaD-DD8jE1pIm0L0ooHc0HY9SBYOeQw/s1600/CS_Code.png" /></a></div><div style="float: left; margin: 6px 6px 0px; width: 280px;"><a href="http://adf.ly/1OHbHh" target="_blank"><img alt="Code Example C#, Code Example VB.NET" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgulrYoUfYJfz40EKRawQ-iISxhV1T4-vVi8rbwkzWwWPOb5NPStwQVd3K3r6lWGkxR5-PlyV7SuGFcERHd7mBlFCaD_HCymi57mq0FBSJ9FMTOIyVXckid3Adhkoc8fUrFD8twfkZS1U8/s1600/VB_Code.png" /></a></div></div><br /><br /><br />Chúc các bạn thành công!<br /><br />Quang Bình

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