Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed

Question

I have a grid view on my page and I want to export it to the Excel Sheet, Below is the code I had written to do this task, here I am already passing the dataset to the method to bind the grid and btnExcelExport is the button which will export the Grid Content in to Excel Sheet :-

private void BindGridView(DataSet ds)
{
    if (ds.Tables.Count > 0)
    {
        if (ds.Tables[0].Rows.Count > 0)
        {
            GVUserReport.DataSource = ds;
            GVUserReport.DataBind();
            btnExcelExport.Visible = true;
        }
    }
}

protected void btnExcelExport_Click(object sender, EventArgs e)
{
    Response.Clear();
    Response.AddHeader("content-disposition","attachment;filename=FileName.xls");
    Response.Charset = "";
    Response.Cache.SetCacheability(HttpCacheability.NoCache);
    Response.ContentType = "application/vnd.xls";
    System.IO.StringWriter stringWrite = new System.IO.StringWriter();
    System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
    GVUserReport.RenderControl(htmlWrite);
    Response.Write(stringWrite.ToString());
    Response.End();
}

public override void VerifyRenderingInServerForm(Control control)
{
    return;
}

Now when I am debugging I found that the grid is binded sucessfully but when trying to export it to Excel, I'm getting this error:

"Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed."

score 148 · Accepted Answer · edited Nov 19 '12 at 12:43

148

I fixed this issue. As I'm using UpdatePanel, I added below code in the Page_Load event of the page and it worked for me:

protected void Page_Load(object sender, EventArgs e) {
  ScriptManager scriptManager = ScriptManager.GetCurrent(this.Page);
  scriptManager.RegisterPostBackControl(this.btnExcelExport);
  //Further code goes here....
}

edited Nov 19 '12 at 12:43

StuartLC

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answered Jun 27 '12 at 07:43

Dharmendra Kumar Singh

2,979
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@ShivaPareek it should work any way, but if it doesn't place a ScriptManagerProxy and use that! – Peter Jul 05 '13 at 11:03
I've used this approach and the whole page is reload. IsPostBackProperty = false which results in not firing the event for the export ? What may be the issue ? – Dimitar Tsonev Oct 02 '13 at 14:08
1

@KrishnaTiwari I added RegisterPostBackControl to Page_Load and PostBackTrigger to my UpdatePanel. The error disappeared but it now reloads my page. My button is inside UpdatePanel with Conditional mode & ChildrenAsTriggers... No Response.Write in the code behind. what to do? – nickornotto Jan 24 '14 at 16:21
Update Panel was the issue for me, I couldn't access the script manager, and I was able to remove update panel – Brent Aug 01 '14 at 17:31
Works for me, thank you. Is anyone has an explaination why this piece of code is required ? – AlexB Mar 02 '17 at 10:27
This is simplified vb syntax of above code. ScriptManager.GetCurrent(Page).RegisterPostBackControl([GrdFiles_controlname]) – noman zafar May 16 '20 at 10:33
+1 Works great. Also I recommend debugging to ensure that those lines are actually hit on execution. In our case we used `Page_PreRender` to register the control, but the method name was incorrectly spelt as `Pre_Render` so the method was never actually being invoked. A stupid mistake but was much harder to spot than it should have been as the ASP.Net error was deep within the business logic which misguided us. – EvilDr Nov 23 '21 at 11:58
I resolved this error by removing the Response.Write code from the code behind which was breaking the AJAX script http://dotnetdebug.net/2006/12/28/syswebformspagerequestmanagerparsererrorexception/ – nimblebit Nov 24 '22 at 13:05

score 19 · Answer 2 · edited Jul 20 '16 at 13:31

19

In my case, the problem was caused by some Response.Write commands at Master Page of the website (code behind). They were there only for debugging purposes (that's not the best way, I know)...

edited Jul 20 '16 at 13:31

meJustAndrew

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answered Feb 25 '14 at 11:54

Marcelo Luz

500
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had same problem.. some debug response write stopped update of cities dropdown after country selected. – Shaakir Aug 23 '17 at 12:55

Trisped · Answer 3 · 2017-08-21T22:25:54.183

10

I added the control to the Triggers tag in the update panel:

    </ContentTemplate>
    <Triggers>
        <asp:PostBackTrigger ControlID="exportLinkButton" />
    </Triggers>
</asp:UpdatePanel>

This way the exportLinkButton will trigger the UpdatePanel to update.
More info here.

edited Aug 21 '17 at 22:25

answered Jul 29 '16 at 21:53

Trisped

5,705
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score 6 · Answer 4 · answered May 19 '14 at 05:59

6

I had the same error, then I tried <asp:PostBackTrigger ControlID="xyz"/> instead of AsyncPostBackTrigger .This worked for me. It is because we don't want a partial postback.

answered May 19 '14 at 05:59

Muhammad Ashhar Hasan

289
6
14

score 6 · Answer 5 · edited Dec 29 '15 at 21:12

6

1- Never use Response.Write.

2- I put the code below after create (not in Page_Load) a LinkButton (dynamically) and solved my problem:

ScriptManager scriptManager = ScriptManager.GetCurrent(this.Page);
scriptManager.RegisterPostBackControl(lblbtndoc1);

edited Dec 29 '15 at 21:12

StealthRT

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answered May 06 '15 at 20:53

Nuno Ribeiro

2,487
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1

I suppose the better approach to ad-hoc response writes would be to enable trace on the page you wish to debug and use Trace.Write. – m-albert Feb 18 '16 at 18:10

score 5 · Answer 6 · answered Nov 30 '17 at 20:28

5

For my VB.Net Friends -

Dim scriptManager As ScriptManager = scriptManager.GetCurrent(Me.Page)
scriptManager.RegisterPostBackControl(Me.YourButtonNameHere)

answered Nov 30 '17 at 20:28

rayt

194
1
8

score 3 · Answer 7 · edited Jul 29 '16 at 20:56

3

Add this to you PageLoad and it will solve your problem:

ScriptManager scriptManager = ScriptManager.GetCurrent(this.Page);
scriptManager.RegisterPostBackControl(this.lblbtndoc1);

edited Jul 29 '16 at 20:56

Trisped

5,705
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answered Feb 06 '13 at 12:27

Krishna Tiwari

41
1

score 1 · Answer 8 · edited May 23 '17 at 11:46

This worked for me too, but with an addition (below).

protected void Page_Load(object sender, EventArgs e) {
  ScriptManager scriptManager = ScriptManager.GetCurrent(this.Page);
  scriptManager.RegisterPostBackControl(this.btnExcelExport);
  //Further code goes here....
}

I was registering a script on my button to click on another button after its event was finished processing. In order for it to work, I had to remove the other button from the Update Panel (just in case somebody faces the same problem).

score 0 · Answer 9 · answered Apr 17 '19 at 15:00

What worked for me was setting aspnet:MaxHttpCollectionKeys to a high value on appSettings tag on the inetpub VirtualDirectories\443\web.config file:

<configuration>
    <appSettings>
        <add key="aspnet:MaxHttpCollectionKeys" value="100000" />
    </appSettings>
</configuration>

score 0 · Answer 10 · answered Jan 18 '23 at 09:49

0

Before doing all this please check if you have given asp:LinkButton ID is same as asp:PostBackTrigger ControlID. If its not, the page going to through the same error

answered Jan 18 '23 at 09:49

Aginjith GJ

31
4

Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed

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