(Export các dòng, cột được chọn trên Gridview trong Asp.net sử dụng thư viện iTextSharp) - Bài viết dưới đây, thủ thuật tin học sẽ giới thiệu với các bạn cách sử dụng thư viện iTextSharp để Export dữ liệu ra file PDF cho phép chọn cột hoặc dòng trên Gridview. Chương trình sẽ tự động lấy toàn bộ các cột có trên Gridview để hiển thị trên Popup, người dùng có thể chọn hoặc bỏ chọn những trường hoặc các dòng dữ liệu không cần thiết để Export ra file PDF.

Nghe những bài hát đỉnh nhất về Thấy cô giáo - Nghe trên Youtube

- B1: Tạo CSDL SQL Customers

- B2: Tạo Bảng Accounts có cấu trúc phía dưới trong CSDL SQL Server

STT	Tên trường	Kiểu trường	Ghi chú
1	AccountID	Int	Trường tự tăng
2	AccountCode	nvarchar(25)
3	AccName	nvarchar(250)
4	AccAddress	nvarchar(250)
5	AccPhone	nvarchar(50)
6	AccFAX	nvarchar(50)
7	AccEmail	nvarchar(50)
8	AccWebsite	nvarchar(150)
9	AccDesc	nvarchar(1500)
10	CreatedDate	datetime
11	ModifiedDate	datetime

- B3: Nhập dữ liệu cho bảng Accounts

- B4: Tạo các stored procedure trong SQL Server

USE [Customers]

CREATE PROCEDURE [dbo].[Pro_Accounts_Get]

@AccountID int

SELECT * FROM Accounts

WHERE

AccountID = @AccountID

CREATE PROCEDURE [dbo].[Pro_Accounts_List]

@Keyword nvarchar(250),

@SortField nvarchar(50),

@SortType nvarchar(10)

declare @strSQL nvarchar(1000)

declare @strWhere nvarchar(500)

declare @strOrder nvarchar (50)

set @strSQL= 'Select * from Accounts'

set @strWhere =' Where 1=1 '

if @Keyword<>''

set @strWhere= @strWhere +' And (AccountCode like N''%' +@Keyword+'%''

Or AccName like N''%' +@Keyword+'%'' Or AccAddress like N''%' +@Keyword+'%''

Or AccPhone like N''%' +@Keyword+'%'' Or AccFAX like N''%' +@Keyword+'%''

Or AccEmail like N''%' +@Keyword+'%'' Or AccWebsite like N''%' +@Keyword+'%'')'

if @SortField='CreatedDate'

Begin

set @strOrder =' Order by CreatedDate'

End

Else

Begin

set @strOrder =' Order by AccName'

End

set @strSQL=@strSQL+@strWhere+@strOrder

print @strSQL

exec sp_executesql @strSQL

Bạn có thể tải về bảng cơ sở dữ liệu SQL bằng cách nhấn vào liên kết tải về dưới đây

- B5: Tạo Project trong Microsoft Visual Studio 2010
Trong Visual Studio tạo 1 Class có tên: Utility và nhập đoạn Code phía dưới cho Class này.

Imports System.Data.SqlClient

Imports System.Data

Namespace ExportSelectedGridviewColumnsUsingItextsharp

Public Class SqlDataProvider

#Region "Membres Prives"

Shared _IsError As Boolean = False

Private _connectionString AsString

#End Region

#Region "Constructeurs"

Public Sub New()

Try

_connectionString = ConfigurationManager.ConnectionStrings("SiteSqlServer").ConnectionString

_IsError = False

Catch ex As Exception

_IsError = True

End Try

End Sub

#End Region

#Region "Proprietes"

Public ReadOnly Property ConnectionString() AsString

Get

Return _connectionString

End Get

End Property

#End Region

#Region "Functions"

Public FunctionFillTable(ByVal sql AsString) As DataTable

Try

Dim tb AsNew DataTable

Dim adap AsNew SqlDataAdapter(sql, _connectionString)

adap.Fill(tb)

Return tb

Catch ex As Exception

Return Nothing

End Try

End Function

Public FunctionFillTable(ByVal ProcName As String, ByVal ParamArrayPara() As ObjectPara) As DataTable

Try

Dim tb AsNew DataTable

Dim adap AsNew SqlDataAdapter(ProcName, _connectionString)

adap.SelectCommand.CommandType = CommandType.StoredProcedure

If NotPara Is NothingThen

For Eachp As ObjectParaIn Para

adap.SelectCommand.Parameters.Add(New SqlParameter(p.Name, p.Value))

End If

adap.Fill(tb)

Return tb

Catch ex As Exception

Return Nothing

End Try

End Function

Public FunctionRunSQL(ByVal ProcName AsString, ByVal ParamArray Para() As ObjectPara) As Object

Try

Dim _cnn AsNew SqlConnection(_connectionString)

_cnn.Open()

Dim cmd AsNew SqlCommand(ProcName, _cnn)

cmd.CommandType = CommandType.StoredProcedure

For Each p As ObjectPara In Para

cmd.Parameters.Add(New SqlParameter(p.Name, p.Value))

Return cmd.ExecuteScalar

Catch ex As Exception

Return Nothing

End Try

End Function

Public FunctionGetRow(ByVal ProcName AsString, ByVal ParamArray Para() As ObjectPara) As DataRow

Try

Dim tb AsNew DataTable

Dim adap AsNew SqlDataAdapter(ProcName, _connectionString)

adap.SelectCommand.CommandType = CommandType.StoredProcedure

For Eachp As ObjectParaIn Para

adap.SelectCommand.Parameters.Add(New SqlParameter(p.Name, p.Value))

adap.Fill(tb)

If tb.Rows.Count Then

Return tb.Rows(0)

End If

Catch ex As Exception

Return Nothing

End Try

Return Nothing

End Function

#End Region

End Class

Public Class ObjectPara

Dim _name As String

Dim _Value As Object

Sub New(ByVal Pname As String, ByVal PValue As Object)

_name = Pname

_Value = PValue

End Sub

Public PropertyName() As String

Get

Return _name

End Get

Set(ByVal value As String)

_name = value

End Set

End Property

Public PropertyValue() As Object

Get

Return _Value

End Get

Set(ByVal value As Object)

_Value = value

End Set

End Property

End Class

Public Class MyEventArgs

Inherits EventArgs

Private Name As String

Private MyId As String

Public PropertySelectedName() As String

Get

Return Name

End Get

Set(ByVal value As String)

Name = value

End Set

End Property

Public Property Id() As String

Get

Return MyId

End Get

Set(ByVal value As String)

MyId = value

End Set

End Property

End Class

Public Class Constants

Public ConstDEFAULT_COLOR_COMPANYNAME As String = "#007dc2"

Public ConstDEFAULT_BACKGROUNDCOLOR_HEADERROW As String = "#99cd00"

Public ConstDEFAULT_COLOR_HEADERROW As String = "#ffffff"

Public ConstDEFAULT_BORDERCOLOR_TABLE As String = "#808080"

Public ConstDEFAULT_BACKGROUNDCOLOR_ROW As String = "#edf5ff"

End Class

End Namespace

Chú ý: Thuộc tính SiteSqlServer chính là chuỗi Connect với SQL Server trong file Web.Config

- B6: Download thư viện iTextSharp tại đây

- B7: References itextsharp.dll trong thư mục vừa giải nén vào Project

- B8: Tạo thư mục Fonts, Download Font ARIALUNI.TTF tại đây và copy file này vào thư mục vừa tạo.

- B9: Download thư viện AjaxControlToolkit tại đây

- B10: Giải nén AjaxControlToolkit.Binary.NET4, và References Ajaxcontroltoolkit.dll trong thư mục vừa giải nén vào Project.

- B11: Download các file ảnh tại đây, Copy ảnh lần lượt vào các thư mục Images

+ delete.gif, icon_search.gif vào thư mục Images
+ no.png, yes.png, sprite.png, lt.gif, icon_pdf.gif vào thư mục Styles\Images

- B12: Tạo thư mục UserControls, thêm file Popup_SelectedColumns.ascx và nhập mã HTML

<%@ ControlLanguage="vb"AutoEventWireup="false"CodeBehind="Popup_SelectedColumns.ascx.vb"Inherits="ExportSelectedGridviewColumnsUsingItextsharp.UserControls.Popup_SelectedColumns"%>

<%@ RegisterTagPrefix="cc1"Assembly="AjaxControlToolkit"Namespace="AjaxControlToolkit"%>

function CheckBoxListSelect(cbControl, state) {

var chkBoxList = document.getElementById(cbControl);

var chkBoxCount = chkBoxList.getElementsByTagName("input");

for (var i = 0; i < chkBoxCount.length; i++) {

chkBoxCount[i].checked = state;

}

return false;

}

</script>

<asp:Panel ID="pnlpopup" runat="server" style="display:none">

<asp:UpdatePanel ID="updatePanelPopup"runat="server"UpdateMode="Conditional">

<asp:Button id="cmdShowPopup"runat="server"style="display:none" />

<cc1:ModalPopupExtenderID="ModalPopupExtender_Popup"runat="server"TargetControlID="cmdShowPopup"X="750"Y="150"

PopupControlID="pnlpopup" CancelControlID="cmdCancel" BackgroundCssClass="ModalPopupBG" Drag="True" />

<divclass="modal"style="width:450px;">

<divclass="modal-dialog">

<asp:label id="lblHeader"runat="server"Text="Export only selected columns to PDF"></asp:label>

</h4>

</div>

<tr>

<td>

<asp:Label ID="lblItemID"Visible="false"runat="server"/>

</td>

</tr>

<tr>

<asp:label id="plCheckAll"runat="server"CssClass="NormalBold"text="CheckAll"></asp:label>

</a>|

<a id="A2" href="#" onclick="javascript: CheckBoxListSelect ('<%= chkExport.ClientID %>',false)">

<asp:label id="plUnCheckAll"runat="server"CssClass="NormalBold"text="UnCheckAll"></asp:label>

</a>

</td>

</tr>

<tr>

<td>

<asp:CheckBoxList ID="chkExport"CellPadding="5"CellSpacing="10"RepeatColumns="2"runat="server">

</asp:CheckBoxList>

</td>

</tr>

</table>

</div>

<asp:LinkButton id="cmdOK" runat="server"CssClass="btn btn-small" CausesValidation="false">

</asp:LinkButton> 

<asp:LinkButton id="cmdCancel"runat="server"CssClass="btn btn-small" Causesvalidation="false">

</asp:LinkButton>

</div>

</ContentTemplate>

<asp:PostBackTrigger ControlID="cmdOK"/>

</Triggers>

</asp:UpdatePanel>

</asp:Panel>

- B13: Nhập Code phía dưới cho file Popup_SelectedColumns.ascx

Imports iTextSharp.text.html

Imports iTextSharp.text

Imports iTextSharp.text.html.simpleparser

Imports iTextSharp.text.pdf

NamespaceExportSelectedGridviewColumnsUsingItextsharp.UserControls

Partial Class Popup_SelectedColumns

InheritsSystem.Web.UI.UserControl

#Region "Private Members"

Private _ItemID As Integer

Private _ItemName As String

#End Region

#Region "Event Click"

Public Delegate Sub MyEventHandler(ByVal sender As Object, ByVal e As MyEventArgs)

Public EventOnSelectedRow As MyEventHandler

#End Region

#Region "GetColumnNames"

Private SubBindColumn()

Dim ColumnNames As String = lblItemID.Text

Dim i As Integer = 0

chkExport.Items.Clear()

For Each sValue As String In ColumnNames.Split(",")

If sValue <> "" Then

chkExport.Items.Add(NewSystem.Web.UI.WebControls.ListItem(sValue, sValue))

chkExport.Items(i).Selected = True

i = i + 1

End If

End Sub

#End Region

#Region "Pulbic Methods"

Public Sub ShowPopup(ByVal ListItemID As String)

If ListItemID <> ""Then

lblItemID.Text = ListItemID

End If

BindColumn()

updatePanelPopup.Update()

ModalPopupExtender_Popup.Show()

End Sub

Public SubHidePopup()

ModalPopupExtender_Popup.Hide()

End Sub

#End Region

#Region "Properties"

Public PropertyItemID() As Integer

Get

Return _ItemID

End Get

Set(ByVal Value As Integer)

_ItemID = Value

End Set

End Property

Public PropertyItemName() As String

Get

Return _ItemName

End Get

Set(ByVal Value As String)

_ItemName = Value

End Set

End Property

#End Region

#Region "Event Handles"

Private SubcmdOK_Click(ByVal sender As Object, ByVal e As System.EventArgs) HandlescmdOK.Click

Dim MyArgs As New MyEventArgs()

Dim sListExport As String = ""

Dim i As Integer = 0

Dim iCount As Integer = 0

For i = 0 TochkExport.Items.Count - 1

If chkExport.Items(i).Selected Then

sListExport &= chkExport.Items(i).Value & ","

iCount = iCount + 1

End If

If sListExport.Length > 0 AndsListExport.EndsWith(",") Then

sListExport = sListExport.Remove(sListExport.Length - 1, 1)

End If

ModalPopupExtender_Popup.Hide()

MyArgs.Id = sListExport

MyArgs.SelectedName = iCount

RaiseEvent OnSelectedRow(Me, MyArgs)

End Sub

Private SubcmdCancel_Click(ByVal sender As Object, ByVal e As System.EventArgs) HandlescmdCancel.Click

ModalPopupExtender_Popup.Hide()

End Sub

Private SubcmdClose_ServerClick(ByVal sender As Object, ByVal e As System.EventArgs) HandlescmdClose.ServerClick

ModalPopupExtender_Popup.Hide()

End Sub

#End Region

End Class

End Namespace

- B14: Mở file Default.aspxdưới dạng HTML và nhập mã HTML

<%@ PageTitle="Export Selected Gridview Columns and Rows Using itextsharp in ASP.Net" Language="vb"MasterPageFile="~/Site.Master"AutoEventWireup="false"CodeBehind="Default.aspx.vb"Inherits="ExportSelectedGridviewColumnsUsingItextsharp._Default"%>

<%@ RegisterTagPrefix="ModalPopup"TagName="Delete"Src="~/UserControls/Popup_ConfirmDelete.ascx"%>

<%@ RegisterTagPrefix="ModalPopup"TagName="Export"Src="~/UserControls/Popup_SelectedColumns.ascx"%>

<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">

<asp:ScriptManager ID="ScriptManager1"runat="server">

</asp:ScriptManager>

<h1>

Export Selected Gridview Columns and Rows Using itextsharp in ASP.Net

</h1>

<br />

<ModalPopup:Export ID="ucSelectedColumns"runat="server"/>

<ModalPopup:Delete ID="ucDeleteItem"runat="server"/>

<asp:UpdatePanel ID="updatePanel"runat="server"UpdateMode="Conditional">

<tr>

<td>

<asp:LinkButton id="cmdExport" runat="server" CssClass="btn btn-small" Causesvalidation="false">

</asp:LinkButton>

<asp:LinkButton id="cmdExportAll" runat="server" CssClass="btn btn-small" Causesvalidation="false">

</asp:LinkButton>

</td>

<tdalign="right">

<asp:Label ID="plKeyword" runat="server" Text="Keyword"></asp:Label>

<asp:TextBox ID="txtSearch" CssClass="form-control" ToolTip="Enter Keyword" runat="server" width="200px"></asp:TextBox>

<asp:ImageButton ID="cmdQuickSearch" runat="server" causesvalidation="false" imageurl="~/images/icon_search.gif"></asp:ImageButton>

</td>

</tr>

<trid="trMessage"runat="server"visible="false">

<tdcolspan="2">

<asp:Label ID="lblMessage" runat="server" Text="No Data"></asp:Label>

</td>

</tr>

<tr>

<tdcolspan="2">

<asp:GridView ID="grvObject" runat="server" AllowPaging="true" PageSize="8"

CssClass="GridStyle"BorderColor="#cbcbcb"BorderStyle="solid"

BorderWidth="1"AutoGenerateColumns="false"DataKeyNames="AccountID"width="100%">

<AlternatingRowStyleCssClass="GridStyle_AltRowStyle"/>

<asp:TemplateField>

<asp:CheckBox ID="chkAll" runat="server"/>

</HeaderTemplate>

<asp:CheckBox ID="chkSelect"runat="server"/>

</ItemTemplate>

</asp:TemplateField>

<asp:BoundField ItemStyle-Width="10%"DataField="AccountCode"HeaderText="AccountCode"/>

<asp:BoundField ItemStyle-Width="15%"DataField="AccName"HeaderText="AccountName"/>

<asp:BoundField ItemStyle-Width="10%"DataField="AccPhone"HeaderText="Phone"/>

<asp:BoundField ItemStyle-Width="10%"DataField="AccFAX"HeaderText="FAX"/>

<asp:BoundField ItemStyle-Width="15%"DataField="AccEmail"HeaderText="Email"/>

<asp:BoundField ItemStyle-Width="15%"DataField="AccWebsite"HeaderText="Website"/>

<asp:TemplateField HeaderText="Function">

<asp:ImageButton ID="cmdDelete"CommandName="Delete"CommandArgument='<%# Eval("AccountID")%>' runat="server"ImageUrl="~/images/delete.gif"CausesValidation="False"></asp:ImageButton>

</ItemTemplate>

</asp:TemplateField>

</Columns>

</asp:GridView>

</td>

</tr>

</table>

</ContentTemplate>

<asp:PostBackTrigger ControlID="cmdExport"/>

<asp:PostBackTrigger ControlID="cmdExportAll"/>

</Triggers>

</asp:UpdatePanel>

</asp:Content>

+ B15: Viết Code cho file Default.aspx

Imports iTextSharp.text.html

Imports iTextSharp.text

Imports iTextSharp.text.html.simpleparser

Imports iTextSharp.text.pdf

Namespace ExportSelectedGridviewColumnsUsingItextsharp

Public Class _Default

Inherits System.Web.UI.Page

#Region "Export PDF"

Private SubMySelExport_OnSelectedRow(ByVal sender As Object, ByVal e AsExportSelectedGridviewColumnsUsingItextsharp.MyEventArgs)

Dim sExportList As String = ""

Dim iCount As Integer = 0

With e

If e.Id <> "" Then

sExportList = e.Id

iCount = e.SelectedName

If sExportList <> "" Then

ExportToPDF("List-Account.pdf", False, sExportList, iCount)

End If

End With

End Sub

Private SubExportToPDF(ByVal FileName As String, ByVal ExportAll As Boolean, ByValExportList As String, ByVal iCount AsInteger)

Dim document As New Document(PageSize.A4.Rotate, 20, 20, 30, 20)

Dim msReport As New System.IO.MemoryStream()

Dim FilePath As String = ""

FilePath = Server.MapPath("Fonts\ARIALUNI.TTF")

Dim fontpath As String = FilePath

'"simsun.ttf" file was downloaded from web and placed in the folder

Dim bf As BaseFont = BaseFont.CreateFont(fontpath, BaseFont.IDENTITY_H, BaseFont.EMBEDDED)

'create new font based on BaseFont

Dim fontCompany As New Font(bf, 13, Font.BOLD, New Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_COLOR_COMPANYNAME)))

Dim fontHeader As New Font(bf, 12, Font.BOLD, Color.BLUE)

Dim fontSubHeader As New Font(bf, 10)

Dim fontTitle As New Font(bf, 11, Font.BOLD, Color.BLACK)

Dim fontContent As New Font(bf, 11, Font.NORMAL, Color.BLACK)

Dim fontTableHeader AsNew Font(bf, 10, Font.BOLD, NewColor(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_COLOR_HEADERROW)))

Try

' creation of the different writers

Dim writer AsPdfWriter = PdfWriter.GetInstance(document, msReport)

' we add some meta information to the document

document.AddAuthor("Thu thuat lap trinh")

document.AddSubject("Export to PDF")

document.Open()

Dim cBreak AsNew Chunk(Environment.NewLine)

Dim pBreak AsNew Phrase()

Dim paBreak AsNew Paragraph()

'=================Start Header =====================

'CompnayName

Dim sText AsString = "THỦ THUẬT LẬP TRÌNH" & vbCrLf

Dim beginning AsNew Chunk(sText, fontCompany)

Dim p1 AsNew Phrase(beginning)

Dim pCompanyName As New Paragraph()

pCompanyName.IndentationLeft = 30

pCompanyName.Add(p1)

document.Add(pCompanyName)

'Website

Dim sWebsite AsString = "Website: http://thuthuatlaptrinh.blogspot.com"

sText = ""

If sWebsite <> "" Then

sText = sWebsite & vbCrLf

End If

If sText <> "" Then

sText = sText.Replace(Environment.NewLine, String.Empty).Replace(" ", String.Empty)

beginning = New Chunk(sText, fontSubHeader)

p1 = New Phrase(beginning)

Dim pAddresse AsNew Paragraph()

pAddresse.IndentationLeft = 30

pAddresse.Add(p1)

document.Add(pAddresse)

End If

Dim sEmail AsString = "Email: kenhphanmemviet@gmail.com"

If sEmail <> "" Then

sText = sEmail & vbCrLf

End If

If sText <> "" Then

sText = sText.Replace(Environment.NewLine, String.Empty).Replace(" ", String.Empty)

beginning = New Chunk(sText, fontSubHeader)

p1 = New Phrase(beginning)

Dim pAddresse AsNew Paragraph()

pAddresse.IndentationLeft = 30

pAddresse.Add(p1)

document.Add(pAddresse)

End If

'=================End Header =====================

'Title

sText = "LIST ACCOUNT"& Environment.NewLine & vbCrLf

If sText <> "" Then

beginning = New Chunk(sText, fontHeader)

p1 = New Phrase(beginning)

Dim pAddresse AsNew Paragraph()

pAddresse.IndentationLeft = 10

pAddresse.Alignment = 1

pAddresse.Add(p1)

document.Add(pAddresse)

End If

Dim datatable AsNew iTextSharp.text.Table(iCount)

datatable.Padding = 2

datatable.Spacing = 1

datatable.WidthPercentage = 98

Dim headerwidths As Single() = New Single(iCount - 1) {}

Dim x AsInteger = 0

Dim ItemStyleWidth As Integer = 10

ItemStyleWidth = 100 / iCount

For EachsValue As StringIn ExportList.Split(",")

'Header Table

headerwidths(x) = CInt(ItemStyleWidth)

Dim cellText AsNew Cell(New Phrase(sValue, fontTableHeader))

cellText.BackgroundColor = New Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_BACKGROUNDCOLOR_HEADERROW))

cellText.HorizontalAlignment = 1

cellText.VerticalAlignment = 1

datatable.AddCell(cellText)

x = x + 1

datatable.Widths = headerwidths

datatable.BorderWidth = 1

datatable.DefaultCellBorderWidth = 1

datatable.DefaultHorizontalAlignment = 1

datatable.DefaultVerticalAlignment = 1

datatable.DefaultCellBorderColor = NewiTextSharp.text.Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_BORDERCOLOR_TABLE))

datatable.BorderColor = NewiTextSharp.text.Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_BORDERCOLOR_TABLE))

Dim iColumn AsInteger = grvObject.Columns.Count - 2

Dim iRow AsInteger = grvObject.Rows.Count - 1

Dim b_SelectedRow As Boolean = False

For i AsInteger = 0 ToiRow

If grvObject.Rows(i).RowType = DataControlRowType.DataRow Then

For j As Integer= 1 To iColumn

Dim mySelectedRow As GridViewRow = grvObject.Rows(i)

Dim chkSelect As CheckBox = TryCast(mySelectedRow.Cells(0).FindControl("chkSelect"), CheckBox)

If Not chkSelect Is Nothing Then

If ExportAll Then

b_SelectedRow = True

Else

b_SelectedRow = chkSelect.Checked

End If

If b_SelectedRow Then

For Each sValue As String In ExportList.Split(",")

If sValue = grvObject.Columns(j).HeaderText Then

Dim mySelectedCell AsTableCell

Dim cellText As String = ""

Dim cell As New iTextSharp.text.Cell

mySelectedCell = mySelectedRow.Cells(j)

cellText = mySelectedCell.Text

If cellText <> ""And cellText <> " "Then

cell = New iTextSharp.text.Cell(cellText)

Else

cell = New iTextSharp.text.Cell("")

End If

'Set Color of Alternating row

If i Mod 2 <> 0 Then

cell.BackgroundColor = New Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_BACKGROUNDCOLOR_ROW))

End If

datatable.DefaultHorizontalAlignment = Element.ALIGN_LEFT

datatable.AddCell(cell)

End If

document.Add(datatable)

Catch e As Exception

Console.Error.WriteLine(e.Message)

End Try

document.Close()

Response.Clear()

Response.AddHeader("content-disposition", "attachment;filename=" & FileName & ".pdf")

Response.ContentType = "application/pdf"

Response.BinaryWrite(msReport.ToArray())

Response.End()

End Sub

#End Region

#Region "Bind Data"

Private SubBindAccount()

Dim objBind As New DataTable

objBind = BindData()

If Not objBind Is Nothing Then

If objBind.Rows.Count > 0 Then

grvObject.DataSource = objBind

grvObject.DataBind()

trMessage.Visible = False

grvObject.Visible = True

Else

trMessage.Visible = True

grvObject.Visible = False

End If

updatePanel.Update()

End If

End Sub

Private FunctionBindData() As DataTable

Dim objSQL As New SqlDataProvider

Dim objBind As DataTable = objSQL.FillTable("Pro_Accounts_List", New ObjectPara("@Keyword", txtSearch.Text.Trim), _

New ObjectPara("@SortField", "CreatedDate"), _

New ObjectPara("@SortType", "DESC"))

Return objBind

End Function

#End Region

#Region "GridView Methods"

Private SubgrvObject_RowDeleting(ByVal sender As Object, ByVal e AsSystem.Web.UI.WebControls.GridViewDeleteEventArgs) Handles grvObject.RowDeleting

Dim ItemID As Integer = CType(grvObject.DataKeys(e.RowIndex).Value, Integer)

Dim ItemName As String = ""

If ItemID <> -1 Then

With CType(ucDeleteItem, ExportSelectedGridviewColumnsUsingItextsharp.UserControls.Popup_ConfirmDelete)

.ItemID = ItemID

.ShowPopup(ItemID, "")

End With

End If

End Sub

Private SubgrvObject_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs) HandlesgrvObject.RowDataBound

If (e.Row.RowType = DataControlRowType.DataRow) Then

'Delete

Dim cmdDelete AsImageButton = DirectCast(e.Row.FindControl("cmdDelete"), ImageButton)

If NotcmdDelete Is NothingThen

cmdDelete.ToolTip = "Delete Account"

End If

End Sub

Private SubgrvObject_PageIndexChanging(ByVal sender As Object, ByVal e AsSystem.Web.UI.WebControls.GridViewPageEventArgs) Handles grvObject.PageIndexChanging

grvObject.PageIndex = e.NewPageIndex

BindAccount()

End Sub

#End Region

#Region "Popup"

Private SubMySelDelete_OnSelectedRow(ByVal sender As Object, ByVal e AsExportSelectedGridviewColumnsUsingItextsharp.MyEventArgs)

Dim ItemName As String = ""

With e

If e.Id <> "" Then

BindAccount()

End If

End With

End Sub

#End Region

#Region "Event Handles"

Protected SubPage_Load(ByVal sender AsObject, ByVal e As System.EventArgs) Handles Me.Load

Try

AddHandler CType(ucDeleteItem, ExportSelectedGridviewColumnsUsingItextsharp.UserControls.Popup_ConfirmDelete).OnSelectedRow, AddressOf MySelDelete_OnSelectedRow

AddHandler CType(ucSelectedColumns, ExportSelectedGridviewColumnsUsingItextsharp.UserControls.Popup_SelectedColumns).OnSelectedRow, AddressOf MySelExport_OnSelectedRow

If Page.IsPostBack = False Then

'Default Submit Button

Page.Form.DefaultButton = cmdQuickSearch.UniqueID

BindAccount()

End If

Catch ex As Exception

End Try

End Sub

Private SubcmdQuickSearch_Click(ByVal sender As Object, ByVal e As System.EventArgs) HandlescmdQuickSearch.Click

BindAccount()

End Sub

Private SubcmdExport_Click(ByVal sender As Object, ByVal e As System.EventArgs) HandlescmdExport.Click

Dim ColumnNames As String = ""

For x As Integer = 0 TogrvObject.Columns.Count - 2

ColumnNames &= grvObject.HeaderRow.Cells(x).Text & ","

If ColumnNames.Length > 0 AndColumnNames.EndsWith(",") Then

ColumnNames = ColumnNames.Remove(ColumnNames.Length - 1, 1)

End If

With CType(ucSelectedColumns, ExportSelectedGridviewColumnsUsingItextsharp.UserControls.Popup_SelectedColumns)

.ShowPopup(ColumnNames)

End With

End Sub

#End Region

End Class

End Namespace

- B16: Mở file Site.Master dưới dạng HTML và gắn thêm mã Javascript. Đoạn mã này có chức năng chọn toàn bộ các dòng khi tích chọn.

$("[id*=chkAll]").live("click", function () {

var chkAll = $(this);

var grid = $(this).closest("table");

$("input[type=checkbox]", grid).each(function () {

if (chkAll.is(":checked")) {

$(this).attr("checked", "checked");

$("td", $(this).closest("tr")).addClass("selected");

} else {

$(this).removeAttr("checked");

$("td", $(this).closest("tr")).removeClass("selected");

}

});

$("[id*=chkSelect]").live("click", function () {

var grid = $(this).closest("table");

var chkAll = $("[id*=chkAll]", grid);

if (!$(this).is(":checked")) {

$("td", $(this).closest("tr")).removeClass("selected");

chkAll.removeAttr("checked");

} else {

$("td", $(this).closest("tr")).addClass("selected");

if ($("[id*=chkSelect]", grid).length == $("[id*=chkSelect]:checked", grid).length) {

chkAll.attr("checked", "checked");

}

});

</script>

Bây giờ chạy Project bạn sẽ có kết quả như ảnh phía dưới.

Chúc các bạn thành công!

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Export file PDF các dòng và cột được chọn trên Gridview sử dụng iTextSharp trong ASP.Net

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