(Export dữ liệu trong Asp.net ra Excel) – Việc cho phép xuất dữ liệu ra Excel sẽ người dùng dễ dàng, thuận tiện và chủ động trong việc căn chỉnh, điều chỉnh, bổ xung định dạng cũng như thông tin. Do vậy lựa chọn Export danh sách dữ liệu ra file Excel luôn là lựa chọn hàng đầu đối với người dùng.
Bài viết dưới đây, thủ thuật tin học sẽ giới thiệu với các bạn cách Export toàn bộ danh sách dữ liệu ra file Excel.
Bài viết dưới đây, thủ thuật tin học sẽ giới thiệu với các bạn cách Export toàn bộ danh sách dữ liệu ra file Excel.
- 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]
GO
CREATE PROCEDURE [dbo].[Pro_Accounts_Get]
@AccountID int
AS
SELECT * FROM Accounts
WHERE
AccountID = @AccountID
Go
CREATE PROCEDURE [dbo].[Pro_Accounts_List]
@Keyword nvarchar(250),
@SortField nvarchar(50),
@SortType nvarchar(10)
AS
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
Go
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 ExportDatatableToExcel
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))
Next
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))
Next
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))
Next
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 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.aspxdưới dạng HTML và nhập mã HTML
<%@ PageTitle="Export Datatable To Excel in ASP.Net" Language="vb" MasterPageFile="~/Site.Master" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="ExportDatatableToExcel._Default" %>
<%@ RegisterTagPrefix="ModalPopup"TagName="ViewRecord"Src="~/UserControls/Popup_ViewRecord.ascx"%>
<%@ 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 Datatable To Excel in ASP.Net
</h1>
<br />
<ModalPopup:ViewRecord ID="ucViewRecord"runat="server"/>
<ModalPopup:Delete ID="ucDeleteItem"runat="server"/>
<asp:Label id="lblExportExcel"runat="server"></asp:Label>
<asp:UpdatePanel ID="updatePanel"runat="server"UpdateMode="Conditional">
<ContentTemplate>
<table cellpadding="2"cellspacing="3"width="100%">
<tr>
<td>
<asp:LinkButton id="cmdExport" runat="server" CssClass="btn btn-small" Causesvalidation="false">
<i class="icon-exportexcel"></i> <asp:label id="lblExport" runat="server" Text="Export Excel"></asp:label>
</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="10"
CssClass="GridStyle"BorderColor="#cbcbcb"BorderStyle="solid"
BorderWidth="1"AutoGenerateColumns="false"DataKeyNames="AccountID"width="100%">
<AlternatingRowStyleCssClass="GridStyle_AltRowStyle"/>
<HeaderStyle CssClass="GridStyle_HeaderStyle"/>
<RowStyle CssClass="GridStyle_RowStyle"/>
<pagerstyle cssclass="GridStyle_pagination"/>
<Columns>
<asp:TemplateField HeaderText="AccountCode">
<ItemStyle width="6%" />
<ItemTemplate>
<asp:LinkButton id="cmdAccountCode"runat="server"CausesValidation="False"CommandName="View"CommandArgument='<%# Eval("AccountID") %>' text='<%# Eval("AccountCode") %>'></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="AccountName">
<ItemStyle width="15%" />
<ItemTemplate>
<asp:LinkButton id="cmdAccountName"runat="server"CausesValidation="False"CommandName="View"CommandArgument='<%# Eval("AccountID") %>' text='<%# Eval("AccName") %>'></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Phone">
<ItemStyle width="10%" />
<ItemTemplate>
<asp:Label ID="lblAccPhone"Text='<%# Eval("AccPhone") %>' runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="FAX">
<ItemStyle width="10%" />
<ItemTemplate>
<asp:Label ID="lblAccFAX"Text='<%# Eval("AccFAX") %>' runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Email">
<ItemStyle width="12%" />
<ItemTemplate>
<asp:Label ID="lblEmail"Text='<%# Eval("AccEmail") %>' runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Function">
<ItemStyle HorizontalAlign="Center"width="5%"/>
<ItemTemplate>
<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>
<Triggers>
<asp:PostBackTrigger ControlID="cmdExport"/>
</Triggers>
</asp:UpdatePanel>
</asp:Content>
- B8: Viết Code cho file Default.aspx
Namespace ExportDatatableToExcel
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 FunctionExportAccountToExcel(ByVal objBind As DataTable)
Dim sExportToExcel AsString = ""
Dim sActivitiesNumber AsString = ""
Dim sParentName As String = ""
Dim ListInfoContact AsString = ""
sExportToExcel &= "<div id='div1'>" & vbCrLf
'=============Insert Header============
sExportToExcel &= InserHeaderInExcel()
'======================================
sExportToExcel &= "<table border='0' cellpadding='0' cellspacing='0' width='99%' align='center'>"& vbCrLf
sExportToExcel &= "<tr>"& vbCrLf
sExportToExcel &= "<td colspan='9'> </td>" & vbCrLf
sExportToExcel &= "</tr>"& vbCrLf
sExportToExcel &= "<tr>"& vbCrLf
sExportToExcel &= "<td align='center' colspan='9' style='font-size:12pt;'><b>LIST ACCOUNT</b></td>" & vbCrLf
sExportToExcel &= "</tr>"& vbCrLf
sExportToExcel &= "<tr>"& vbCrLf
sExportToExcel &= "<td colspan='9'> </td>" & vbCrLf
sExportToExcel &= "</tr>"& vbCrLf
sExportToExcel &= "</table>"& vbCrLf
sExportToExcel &= "<table border='1' cellpadding='0' cellspacing='0' width='99%' align='center'>"& vbCrLf
sExportToExcel &= "<tr>"& vbCrLf
sExportToExcel &= "<td align='center'><b>AccountCode</b></td>" & vbCrLf
sExportToExcel &= "<td align='center'><b>AccountName</b></td>" & vbCrLf
sExportToExcel &= "<td align='center'><b>Phone</b></td>"& vbCrLf
sExportToExcel &= "<td align='center'><b>FAX</b></td>" & vbCrLf
sExportToExcel &= "<td align='center'><b>Email</b></td>" & vbCrLf
sExportToExcel &= "<td align='center'><b>Website</b></td>" & vbCrLf
sExportToExcel &= "<td align='center'><b>Description</b></td>" & vbCrLf
sExportToExcel &= "<td align='center'><b>Created Date</b></td>" & vbCrLf
sExportToExcel &= "<td align='center'><b>Modified Date</b></td>"& vbCrLf
sExportToExcel &= "</tr>"& vbCrLf
'End Header
For Each row As DataRow In objBind.Rows
If Notrow Is Nothing Then
sExportToExcel &= "<tr>"& vbCrLf
If NotIsDBNull(row("AccountCode")) Then
sExportToExcel &= "<td>" & row("AccountCode").ToString & "</td>" & vbCrLf
Else
sExportToExcel &= "<td></td>" & vbCrLf
End If
IfNot IsDBNull(row("AccName")) Then
sExportToExcel &= "<td>" & row("AccName").ToString & "</td>" & vbCrLf
Else
sExportToExcel &= "<td></td>" & vbCrLf
End If
If NotIsDBNull(row("AccPhone")) Then
sExportToExcel &= "<td>" & row("AccPhone").ToString & "</td>" & vbCrLf
Else
sExportToExcel &= "<td></td>" & vbCrLf
EndIf
If NotIsDBNull(row("AccFAX")) Then
sExportToExcel &= "<td>" & row("AccFAX").ToString & "</td>" & vbCrLf
Else
sExportToExcel &= "<td></td>" & vbCrLf
End If
If NotIsDBNull(row("AccEmail")) Then
sExportToExcel &= "<td>" & row("AccEmail").ToString & "</td>" & vbCrLf
Else
sExportToExcel &= "<td></td>" & vbCrLf
End If
If NotIsDBNull(row("AccWebsite")) Then
sExportToExcel &= "<td>" & row("AccWebsite").ToString & "</td>" & vbCrLf
Else
sExportToExcel &= "<td></td>" & vbCrLf
End If
If NotIsDBNull(row("AccDesc")) Then
sExportToExcel &= "<td>" & row("AccDesc").ToString & "</td>" & vbCrLf
Else
sExportToExcel &= "<td></td>" & vbCrLf
End If
If NotIsDBNull(row("CreatedDate")) Then
sExportToExcel &= "<td>" & row("CreatedDate").ToString & "</td>" & vbCrLf
Else
sExportToExcel &= "<td></td>" & vbCrLf
End If
If NotIsDBNull(row("ModifiedDate")) Then
sExportToExcel &= "<td>" & row("ModifiedDate").ToString & "</td>" & vbCrLf
Else
sExportToExcel &= "<td></td>" & vbCrLf
End If
sExportToExcel &= "</tr>"& vbCrLf
End If
Next
sExportToExcel &= "</table></div>"& vbCrLf
Return sExportToExcel
End Function
Private SubExportToExcel(ByVal FileName As String)
Dim objBind As New DataTable
Dim sb As New System.Text.StringBuilder
Dim sExportToExcel AsString = ""
Dim style As String = "<style>.text{mso-number-format:\@;}</style>"
objBind = BindData()
If objBind.Rows.Count > 0 Then
sExportToExcel = ExportAccountToExcel(objBind)
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 AsNew 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_RowCommand(ByVal sender As Object, ByVal e AsSystem.Web.UI.WebControls.GridViewCommandEventArgs) Handles grvObject.RowCommand
Dim ItemID As Integer = Integer.Parse(e.CommandArgument)
Select Casee.CommandName.ToLower
Case "view"
With CType(ucViewRecord, ExportDatatableToExcel.UserControls.Popup_ViewRecord)
.ItemID = ItemID
.ShowPopup(ItemID)
End With
End Select
End Sub
Private SubgrvObject_RowDeleting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewDeleteEventArgs) HandlesgrvObject.RowDeleting
Dim ItemID As Integer = CType(grvObject.DataKeys(e.RowIndex).Value, Integer)
Dim ItemName As String = ""
If ItemID <> -1 Then
With CType(ucDeleteItem, ExportDatatableToExcel.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 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 AsExportDatatableToExcel.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, ExportDatatableToExcel.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
Chúc các bạn thành công!
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