(Export các cột được chọn ra Excel trong Asp.net) – Khi thực hiện công việc Export danh sách dữ liệu ra Excel, tùy vào từng thời điểm và mục đích công việc mà danh sách cột dữ liệu sẽ khác nhau. Nếu như phần mềm không hỗ trợ việc lựa chọn trường dữ liệu để Export người sử dụng sẽ phải Export và xóa đi những trường không cần đến. Vậy có cách nào để cho phép người sử dụng có thể dễ dàng chọn hoặc bỏ chọn trường dữ liệu khi Export sang Excel? Bài viết dưới đây sẽ hướng dẫn các bạn làm điều đó, chương trình sẽ tự động lấy toàn bộ các trường dữ liệu có trong 1 bảng dữ liệu, từ đó người dùng có thể chọn hoặc bỏ chọn những trường không cần thiết để Export ra file Excel.

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 ExportSelectedColumnsToExcel

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

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

End Namespace

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

- B6: Download thư viện AjaxControlToolkit tại địa chỉ: http://ajaxcontroltoolkit.codeplex.com/downloads/get/116534

- B7: Giải nén AjaxControlToolkit.Binary.NET4, và References Ajaxcontroltoolkit.dll trong thư mục vừa giải nén vào Project.

- B8: 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

- B9: Tạo thư mục UserControls, thêm file Popup_SelectedColumns.ascx và nhập mã HTML

<%@ ControlLanguage="vb"AutoEventWireup="false"CodeBehind="Popup_SelectedColumns.ascx.vb"Inherits="ExportSelectedColumnsToExcel.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 Excel"></asp:label>

</h4>

</div>

<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>

- B10: Tạo thư mục UserControls, thêm file Popup_SelectedColumns.ascx và nhập mã HTML

Imports iTextSharp.text.html

Imports iTextSharp.text

Imports iTextSharp.text.html.simpleparser

Imports iTextSharp.text.pdf

Namespace ExportSelectedColumnsToExcel.UserControls

Partial Class Popup_SelectedColumns

Inherits System.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 Event OnSelectedRow As MyEventHandler

#End Region

#Region "Private Methods"

Private Function GetColumnNames(ByVal TableName As String) As IEnumerable(Of String)

Dim ColumnNames = New List(Of String)()

Dim objSQL As New SqlDataProvider

Dim objBind As DataTable = objSQL.FillTable("Select COLUMN_NAME, DATA_TYPE FROM information_schema.columns where TABLE_NAME ='" & TableName & "'")

If Not objBind Is Nothing Then

For Each row As DataRow In objBind.Rows

ColumnNames.Add(row.Field(Of String)("COLUMN_NAME"))

End If

Return ColumnNames

End Function

#End Region

#Region "GetColumnNames"

Private Sub BindColumn()

Dim TableName As String = "Accounts"

Dim ColumnNames = GetColumnNames(TableName)

Dim i As Integer = 0

chkExport.Items.Clear()

For Each columnName As String In ColumnNames

chkExport.Items.Add(New System.Web.UI.WebControls.ListItem(columnName, columnName))

chkExport.Items(i).Selected = True

i = i + 1

End Sub

#End Region

#Region "Pulbic Methods"

Public Sub ShowPopup(ByVal ItemID As Integer)

BindColumn()

updatePanelPopup.Update()

ModalPopupExtender_Popup.Show()

End Sub

Public Sub HidePopup()

ModalPopupExtender_Popup.Hide()

End Sub

#End Region

#Region "Properties"

Public Property ItemID() As Integer

Get

Return _ItemID

End Get

Set(ByVal Value As Integer)

_ItemID = Value

End Set

End Property

Public Property ItemName() As String

Get

Return _ItemName

End Get

Set(ByVal Value As String)

_ItemName = Value

End Set

End Property

#End Region

#Region "Event Handles"

Private Sub cmdOK_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmdOK.Click

Dim MyArgs As New MyEventArgs()

Dim sListExport As String = ""

Dim i As Integer = 0

Dim iCount As Integer = 0

For i = 0 To chkExport.Items.Count - 1

If chkExport.Items(i).Selected Then

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

iCount = iCount + 1

End If

If sListExport.Length > 0 And sListExport.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 Sub cmdCancel_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmdCancel.Click

ModalPopupExtender_Popup.Hide()

End Sub

Private Sub cmdClose_ServerClick(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmdClose.ServerClick

ModalPopupExtender_Popup.Hide()

End Sub

#End Region

End Class

End Namespace

- B11: Mở file Default.aspxdưới dạng HTML và nhập mã HTML

<%@ PageTitle="Export Selected Columns to Excel in ASP.Net" Language="vb" MasterPageFile="~/Site.Master" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="ExportSelectedColumnsToExcel._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 Columns to Excel 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>

</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>

+ B12: Viết Code cho file Default.aspx

Namespace ExportSelectedColumnsToExcel

Public Class _Default

Inherits System.Web.UI.Page

#Region "Export Excel"

Private FunctionInserHeaderInExcel() As String

Dim sExportToExcel AsString = ""

sExportToExcel &= "<table border='0' cellpadding='0' cellspacing='0' width='99%' align='center'>"& vbCrLf

sExportToExcel &= "<tr>"& vbCrLf

sExportToExcel &= "<td colspan='3' style='font-size:14pt;'><b>THỦ THUẬT LẬP TRÌNH</b></td>"& vbCrLf

sExportToExcel &= "</tr>"& vbCrLf

sExportToExcel &= "<tr>"& vbCrLf

sExportToExcel &= "<td colspan='3'><b>Website:</b> http://thuthuatlaptrinh.blogspot.com</td>" & vbCrLf

sExportToExcel &= "</tr>"& vbCrLf

sExportToExcel &= "<tr>"& vbCrLf

sExportToExcel &= "<td colspan='3'><b>Email:</b> kenhphanmemviet@gmail.com</td>" & vbCrLf

sExportToExcel &= "</tr>"& vbCrLf

sExportToExcel &= "</table>"& vbCrLf

Return sExportToExcel

End Function

Private SubMySelExport_OnSelectedRow(ByVal sender As Object, ByVal e AsExportSelectedColumnsToExcel.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

ExportToExcel("List-Account.xls", sExportList, iCount)

End If

End With

End Sub

Private FunctionExportAccountToExcel(ByVal objBind As DataTable, ByVal FileName As String, ByValExportList As String, ByVal iCount AsInteger) As String

Dim sExportToExcel AsString = ""

Dim dColumn As DataColumn

If Not objBind Is Nothing Then

If objBind.Rows.Count > 0 Then

sExportToExcel &= InserHeaderInExcel()

sExportToExcel &= "<table border='0' cellpadding='0' cellspacing='0' width='99%' align='center'>"& vbCrLf

sExportToExcel &= "<tr>"& vbCrLf

sExportToExcel &= "<td colspan="& iCount & "> </td>"& vbCrLf

sExportToExcel &= "</tr>"& vbCrLf

sExportToExcel &= "<tr>"& vbCrLf

sExportToExcel &= "<td align='center' colspan=" & iCount & " style='font-size:12pt;'><b>LIST ACCOUNT</b></td>" & vbCrLf

sExportToExcel &= "</tr>"& vbCrLf

sExportToExcel &= "<tr>"& vbCrLf

sExportToExcel &= "<td colspan=" & iCount & "> </td>"& vbCrLf

sExportToExcel &= "</tr>"& vbCrLf

sExportToExcel &= "</table>"& vbCrLf

sExportToExcel &= "<table border='1' cellpadding='0' cellspacing='0' width='99%' align='center'>"& vbCrLf

'Header

sExportToExcel &= "<tr>" & vbCrLf

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

sExportToExcel &= "<td align='center'><b>"& sValue & "</b></td>"& vbCrLf

sExportToExcel &= "</tr>"& vbCrLf

For Eachrow As DataRowIn objBind.Rows

sExportToExcel &= "<tr>" & vbCrLf

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

For Each dColumn In objBind.Columns

If sValue = dColumn.ColumnName Then

If NotIsDBNull(row(sValue)) Then

sExportToExcel &= "<td>"& row(sValue).ToString & "</td>"& vbCrLf

Else

sExportToExcel &= "<td></td>"& vbCrLf

End If

sExportToExcel &= "</tr>" & vbCrLf

sExportToExcel &= "</table>"& vbCrLf

End If

ReturnsExportToExcel

End Function

Private SubExportToExcel(ByVal FileName As String, ByVal ExportList As String, ByVal iCount As Integer)

Dim objBind As New DataTable

Dim sb As New System.Text.StringBuilder

DimsExportToExcel As String= ""

Dim style As String = "<style>.text{mso-number-format:\@;}</style>"

objBind = BindData()

If objBind.Rows.Count > 0 Then

sExportToExcel = ExportAccountToExcel(objBind, FileName, ExportList, iCount)

sb.Append(sExportToExcel)

lblExport.Text = sb.ToString()

sb.Remove(0, sb.Length)

Response.Clear()

Response.Charset = ""

Response.ContentEncoding = System.Text.Encoding.UTF8

Response.Cache.SetCacheability(HttpCacheability.NoCache)

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

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

Response.ContentEncoding = Encoding.Unicode

Response.BinaryWrite(Encoding.Unicode.GetPreamble())

Dim sw AsNew System.IO.StringWriter

Dim htw As New HtmlTextWriter(sw)

lblExport.RenderControl(htw)

Response.Output.Write(style & sw.ToString().Replace("td", "td class='text'"))

Response.Flush()

Response.End()

End If

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, ExportSelectedColumnsToExcel.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 AsExportSelectedColumnsToExcel.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, ExportSelectedColumnsToExcel.UserControls.Popup_ConfirmDelete).OnSelectedRow, AddressOf MySelDelete_OnSelectedRow

AddHandler CType(ucSelectedColumns, ExportSelectedColumnsToExcel.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

With CType(ucSelectedColumns, ExportSelectedColumnsToExcel.UserControls.Popup_SelectedColumns)

.ShowPopup(-1)

End With

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!

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Cho phép chọn cột để Export danh sách dữ liệu (Datatable) ra Excel trong ASP.Net

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