Error: Unable to evaluate expression

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I am getting the following exception in asp.net: Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack

When calling Rpt.ExportToHttpResponse(ExportFormatType.Excel, Response, true, " Summary Report");
method on a btn click event.

so after this statement btnExcel.Enabled=true; not executed ;
or if i write btnExcel.Enabled=true; in finally block then also not executed.

Any ideas

my code is like this,

C#

protected void btnExcel_Click(object sender, EventArgs e)
    {
           try
            {
          Rpt.ExportToHttpResponse(ExportFormatType.Excel, Response, true, 
          "Summary Report");
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                ex = null;
            }
          finally
              {                 
                Rpt.Dispose();
                Rpt.Close();
                }
           btnExcel.Enabled = true;

}

Posted 2-May-12 20:06pm

Member 8861818

Updated 2-May-12 20:23pm

Sandeep Mewara

v2

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Bernhard Hiller 3-May-12 2:46am

What's Rpt?

Member 8861818 3-May-12 3:03am

rpt is object of class ReportDocument .

i.e.
ReportDocument Rpt=new ReportDocument();

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Prerak Patel · Answer 1 · 2012-05-02T20:49:00

Solution 1

I doubt this sequence.

C#

Rpt.Dispose();
Rpt.Close();

Make it reverse

C#

Rpt.Close();
Rpt.Dispose();

Posted 2-May-12 20:49pm

Prerak Patel

Comments

Member 8861818 4-May-12 1:06am

i make it reverse i.e.
Rpt.Close();
Rpt.Dispose();

but still not working.