(Làm thế nào để xuất dữ liệu Gridview sang PDF trong Asp.net) – Trong một số trường hợp, người sử dụng không muốn Export toàn bộ các cột trong danh sách dữ liệu mà chỉ muốn Export toàn bộ dữ liệu đã được hiển thị trên Gridview ra file Excel. Bài viết dưới đây sẽ hướng dẫn các bạn làm công việc này.

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 ExportGridviewToExcel

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 Eachp As ObjectParaIn Para

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

Return cmd.ExecuteScalar

Catch ex As Exception

Return Nothing

End Try

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

ReturnName

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_BACKGROUNDCOLOR_HEADERROW As String = "#99cd00"

Public Const DEFAULT_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 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_excel.png vào thư mục Styles\Images

- B7: Mở file Default.aspx dưới dạng HTML và nhập mã HTML

<%@ PageTitle="Export Gridview to Excel in ASP.Net" Language="vb" MasterPageFile="~/Site.Master" AutoEventWireup="false" EnableEventValidation= "false" CodeBehind="Default.aspx.vb"Inherits="ExportGridviewToExcel._Default"%>

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

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

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

</asp:ScriptManager>

<h1>

Export Gridview to Excel in ASP.Net

</h1>

<br />

<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>

</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: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: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"/>

</Triggers>

</asp:UpdatePanel>

</asp:Content>

- B11: Viết Code cho file Default.aspx

Imports System.IO

Namespace ExportGridviewToExcel

Public Class _Default

Inherits System.Web.UI.Page

#Region "Export Excel"

Private SubExportToExcel(ByVal FileName As String)

Dim style As String = "<style> .textmode { } </style>"

Dim sw As New StringWriter()

Dim hw As New HtmlTextWriter(sw)

Dim i As Integer = 0

grvObject.AllowPaging = False

BindAccount()

'Header

For i = 0 TogrvObject.Columns.Count - 1

grvObject.HeaderRow.Cells(i).BackColor = System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_BACKGROUNDCOLOR_HEADERROW)

grvObject.HeaderRow.Cells(i).ForeColor = System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_COLOR_HEADERROW)

grvObject.HeaderRow.Cells(5).Visible = False

For i = 0 TogrvObject.Rows.Count - 1

Dim row AsGridViewRow = grvObject.Rows(i)

row.BackColor = System.Drawing.Color.White

row.Attributes.Add("class", "textmode")

row.Cells(5).Visible = False

If i Mod2 <> 0 Then

For j AsInteger = 0 TogrvObject.Columns.Count - 1

row.Cells(j).Style.Add("background-color", Constants.DEFAULT_BACKGROUNDCOLOR_ROW)

End If

grvObject.RenderControl(hw)

Response.Clear()

Response.Buffer = True

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

Response.Charset = ""

Response.ContentType = "application/vnd.ms-excel"

Response.Write(style)

Response.Output.Write(sw.ToString())

Response.Flush()

Response.End()

End Sub

Public Overrides Sub VerifyRenderingInServerForm(ByVal control As Control)

' Verifies that the control is rendered

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, ExportGridviewToExcel.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 AsExportGridviewToExcel.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, ExportGridviewToExcel.UserControls.Popup_ConfirmDelete).OnSelectedRow, AddressOf MySelDelete_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

ExportToExcel("List-Account.xls")

End Sub

#End Region

End Class

End Namespace

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

Chúc các bạn thành công!

Quang Bình

Export dữ liệu trên Gridview sang Excel trong ASP.Net

0 comments Blogger 0 Facebook

Post a Comment

Popular Posts

Export dữ liệu trên Gridview sang Excel trong ASP.Net

Next

Newer Post

Previous

Older Post

0 comments Blogger 0 Facebook

Post a Comment