button enable problem

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i have disable the button using javascript
i have this code ,

C#

protected void btnExcel_Click(object sender, EventArgs e)
    {      
        view_report();
      
        try
        {
            Rpt.ExportToHttpResponse(ExportFormatType.PortableDocFormat, Response, true, "Employee Report");


        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
            ex = null;
        }
        finally
        {
         btnExcel.enabled=true;
            Rpt.Dispose();
            Rpt.Close();
        }
       
    
    }

in try block got the exception ,
Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack

so btnExcel.enabled=true;
this statement not executed in finally block

Posted 16-May-12 21:04pm

Member 8861818

Updated 28-May-12 21:18pm

v2

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sunandandutt · Answer 1 · 2012-05-16T21:11:00

Solution 1

Might be exception in your Funciton Rpt.ExportToHttpResponse()

comment this method and check is application running and button is enabled or not?

i suggest you to check your Function.

if you remove try catch block and run application then you will get actual location where the error is.

Posted 16-May-12 21:11pm

sunandandutt

Updated 16-May-12 21:12pm

v2

Comments

Member 8861818 17-May-12 3:18am

yes exception in the Funciton Rpt.ExportToHttpResponse
if i comment this function then btn enable but
i can't comment this funtion as it gives the repot in pdf format
only execution of function i have to enable button.

Sandeep Mewara · Answer 2 · 2012-05-16T21:15:00

Solution 2

in try block got the exception ,
You are getting an exception in your method ExportToHttpResponse. Based on what are you doing, I can guess the code and I believe you are doing a Response.End in it. Debugging in VS will tell you the exact line.

In place of Response.End you have to use HttpContext.Current.ApplicationInstance.CompleteRequest method to bypass the code execution to the Application_EndRequest event.

Look here for details: Microsoft Support: ThreadAbortException Occurs If You Use Response.End, Response.Redirect, or Server.Transfer[^]

Posted 16-May-12 21:15pm

Sandeep Mewara

Comments

Member 8861818 17-May-12 3:26am

i debugg in vs but unable to find Response.End
pls help

Sandeep Mewara 17-May-12 3:45am

You say no Response.End or Response.Redirect in your workflow? Sure? Used F11 in debugging?

Member 8861818 17-May-12 4:47am

I press F11 on function Rpt.ExportToHttpResponse() then control remain on function Rpt.ExportToHttpResponse() itself.