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Output data directly into Excel format in asp.net

Source: Internet
Author: User
Tags visual studio
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This article realizes that the data in the database is output directly to the Excel file format and output in the browser. Here is an example of implementation:
View examples

Excelexport.aspx

<%@ Page language= "vb" autoeventwireup= "false" codebehind= "ExcelExport.aspx.vb"
inherits= "AspxWeb.mengxianhui.com.ExcelExport"%>
! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 transitional//en"
<HTML>
<HEAD>
<title> Excelexport </title>
<meta name= "generator" content= "Microsoft Visual Studio.NET 7.0"
<meta name= "Code_language" content= "Visual Basic 7.0"
<meta name= "vs_defaultClientScript" content= "JavaScript"
<meta name= "vs_targetschema" content= "http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body ms_positioning= "GridLayout"
<form id= "Form1" method= "POST" runat= "Server"
<asp:datagrid id= "DATAGRID1" runat= "Server" cellpadding= "4" backcolor= "white"
Bordercolor= "#CC9966" borderwidth= "1px" borderstyle= "None" width= "100%" height= "100%"
Font-size= "9pt" font-names= "Song Body"
<selecteditemstyle font-bold= "True" forecolor= "#663399" backcolor= "#FFCC66" > </SelectedItemStyle>
<alternatingitemstyle backcolor= "#FFCC99" > </AlternatingItemStyle>
<itemstyle borderwidth= "2px" forecolor= "#330099" borderstyle= "Solid"
Bordercolor= "BLACK" backcolor= "white" > </ItemStyle>
Forecolor= "#FFFFCC" borderstyle= "Solid" bordercolor= "Black" backcolor= "#990000" > </HeaderStyle>
</asp:datagrid>
</form>
</body>
</HTML>

ExcelExport.aspx.vb

Public Class Excelexport
Inherits System.Web.UI.Page
Protected WithEvents DataGrid1 as System.Web.UI.WebControls.DataGrid
#Region the code generated by the Web Forms Designer
' This call is required by the Web Forms Designer.
Private Sub InitializeComponent ()
End Sub

Private Sub Page_Init (ByVal sender as System.Object, ByVal e as System.EventArgs) _
Handles Mybase.init
' CodeGen: This method call is required by the Web Forms Designer
' Do not modify it using the Code Editor.
InitializeComponent ()
End Sub

#End Region
Private Sub Page_Load (ByVal sender as System.Object, ByVal e as System.EventArgs) _
Handles MyBase.Load
' The user code to place the initialization page here
' Defines whether it is a SQL Server database, False here
Dim blnissqlserver as System.Boolean = False
Dim strSQL as String
Dim Objdataset as New DataSet ()
Dim objconn as Object
Dim strcnn as String
If Blnissqlserver Then
strcnn = "User id=sa;initial catalog=northwind;data source=.\netsdk;"
objconn = New System.Data.SqlClient.SqlConnection (strcnn)
objConn.Open ()
Dim Objadapter as New System.Data.SqlClient.SqlDataAdapter ()
strSQL = "SELECT * FROM Customers where country= ' USA '"
Objadapter.selectcommand = New System.Data.SqlClient.SqlCommand (strSQL, objconn)
Objadapter.fill (Objdataset)
Else
strcnn = "Provider=Microsoft.Jet.OLEDB.4.0;Data source=" + Server.MapPath ("Test.mdb")
objconn = New System.Data.OleDb.OleDbConnection (strcnn)
objConn.Open ()
Dim Objadapter as New System.Data.OleDb.OleDbDataAdapter ()
strSQL = "Select top Title from Document"
Objadapter.selectcommand = New System.Data.OleDb.OleDbCommand (strSQL, objconn)
Objadapter.fill (Objdataset)
End If
Dim Oview as New DataView (objdataset.tables (0))
DataGrid1.DataSource = Oview
Datagrid1.databind ()
Objconn.close ()
Objconn.dispose ()
objconn = Nothing
If request.querystring ("bexcel") = "1" Then
Response.ContentType = "Application/vnd.ms-excel"
' Remove charset settings from Content-type header
Response.Charset = ""
' Close ViewState
Me.enableviewstate = False
Dim tw as New System.IO.StringWriter ()
Dim HW as New System.Web.UI.HtmlTextWriter (TW)
' Get control of HTML
Datagrid1.rendercontrol (HW)
' Write HTML back to the browser
Response.Write (TW. ToString ())
Response.End ()
End If
End Sub
End Class




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