Export to excel without Response.End () ?

Hi all,

Im having problems exporting a gridview to excel. Most of the solutions i found here and on other sites include altering the response  - this has a nasty side effect of generating the expetion discussed here:

http://weblogs.asp.net/leftslipper/archive/2007/02/26/sys-webforms-pagerequestmanagerparsererrorexception-what-it-is-and-how-to-avoid-it.aspx -

on AJAX enabled pages.

To avoid this exeption i popup a new page - that isnt  AJAX Enabled - and export the gridview there.

This isnt working very well because the Response.End() stops the page from fully loading and thus i can not close the popup - unacceptable in production.

Is there a way to export to excel without ending the Response? - alternatively is there a way to 'regain control ' of the Response in order to close the popup?

I have been stuck on this problem for a while now - any help would really be appreciated ( my previouse post on this subject is here:


Thanks again :P



3/6/2008 11:54:01 AM
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i can't understand  exactly the problem you are facing, is it you wanted to export datagrid to excel with out having a popup window, which asks for the default filetype to save etc

Ramesh S
Bangalore, Koramangala,India

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3/6/2008 12:09:09 PM
Hi and thanks for the quick reply :P
No, that pop up for save as and so on is fine.
The problem is i cant use export methods which alter the reponse on ajax enabled pages. is there an alternative to altering the reponse when exporting a gridview to excel.
What i've tried to do is popup a new window which isnt ajax enabled and export the gridveiw from there.

This isnt working very well because the Response.End() stops the page from fully loading and thus i can not close the new  popup - unacceptable in production. If there is no way to export without altering the response - is there a way i could 'regain' control in order to close the page after the Response.End has fired ?

Thank you very much again - if this isnt clear plaese tell me :P

3/6/2008 12:19:40 PM


i got to know exactly whats the problem you are facing, try using  

var oXmlHttp = createXMLHttp(); object in your javascript of which you are calling ajax page like

oXmlHttp.open("get", "GetData.aspx");

it might solve the problem , else let me know i shall post the solution in detail...

Ramesh S
Bangalore, Koramangala,India

Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
3/6/2008 12:42:26 PM

Hi and thank you very much for the quick response again :P

Im sorry im quite a noob :P could you post a more detailed solution ? im not sure what you mean.

Please note i am using the ajax toolkit.

Heres my ImageButton syntax if thats what you mean

<asp:ImageButton ID="ImageButton2" PostBackUrl="~/Store/ExportDayView.aspx" ImageUrl="~/images/Images/office2007_icon_excel.jpg" OnClientClick="window.open('ExportDayView.aspx','', 'width=10,height=10');return false;"

runat="server" />

3/6/2008 12:51:06 PM


Please use below code


<%@ Page Language="VB" AutoEventWireup="false" EnableEventValidation ="false"   %>
  <%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.Odbc" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script language ="vbscript" runat ="server" >
    Public ConnStr As String = "Driver={MySQL ODBC 3.51 Driver};Server=localhost;Database=TaxPRo;uid=root;pwd=password;option=3"
    Public con As OdbcConnection = New OdbcConnection(ConnStr)
    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click

        Response.Buffer = True
        Response.AddHeader("Content-Disposition", "attachment; filename=" & TextBox1.Text & ".xls")

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

        Dim writer As New System.IO.StringWriter()

        Dim html As New System.Web.UI.HtmlTextWriter(writer)



    End Sub
    Public Overloads Overrides Sub VerifyRenderingInServerForm(ByVal control As Control)
    End Sub

    Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs)

    End Sub

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    End Sub

    Protected Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs)
        Dim cmdsave2 As OdbcCommand = New OdbcCommand("select * from " & TextBox1.Text & "", con)
        GridView1.DataSource = cmdsave2.ExecuteReader
    End Sub
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
    <form id="form1" runat="server">
        <asp:GridView ID="GridView1"  runat="server" Style="z-index: 100; left: 185px; position: absolute;
            top: 188px" AutoGenerateColumns="true" Width="310px">
        <asp:Button ID="Button2" runat="server" OnClick="Button2_Click" Style="z-index: 105;
            left: 443px; position: absolute; top: 92px" Text="Go....." Width="46px" />
        <asp:Button ID="Button1" runat="server" Style="z-index: 103; left: 506px; position: absolute;
            top: 92px" Text="Export" Width="100px" />
        <asp:TextBox ID="TextBox1" runat="server" Style="z-index: 104; left: 264px; position: absolute;
            top: 92px">File name here</asp:TextBox>
          <br />
        <br />
        <br />
        <br />
        the Table name here:</div>
~Avinash desai~
Software Developer

Please remember to click "Mark as Answer" on this post if it helped you.
3/6/2008 1:05:50 PM

Hi Avinash and thank you for your replays.

Im intrested in any solution to export to excel without using response.End as this finishes my page processing pre - maturly :P


3/11/2008 12:57:03 PM

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