{Text =无法评估表达式，因为代码已优化或本机框位于调用堆栈之上。} [英] {Text = Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack.}

问题描述

您好b $ b

我有一个导出到Excel的按钮。它工作正常，直到它得到Response.End（）;

之后我得到一个错误说{Text =无法评估表达式，因为代码已优化或本机框架位于顶部调用堆栈。}之后弹出一个窗口，询问您是要保存还是查看文件。它显示它是一个Excel文件，但是一旦我查看它，它就会在Visual Studio 2009中打开。有关如何解决此问题的任何帮助将不胜感激，这是我目前使用的代码：

Hi
I have a button that Exports to Excel. It works fine and all until it get's to the Response.End();
After that I get an error saying {Text = Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack.} After that the a window pops up that asks if you want to save or view the file. It shows that it's a Excel file, but as soon as I view it, it opens in Visual Studio 2009. Any help on how to solve this problem would be appreciated, here is the code I am currently using:

public override void VerifyRenderingInServerForm(Control control)
    {
        //Verifies that the control is rendered
    }

    protected void btnExportToExcel_Click(object sender, EventArgs e)
    {
        try
        {
            if (gvCustomData.Rows.Count > 0)
            {
                Response.Clear();
                Response.Buffer = true;
                Response.ContentType = "application/vnd.ms-excel";
                // Response.ContentType ="application/text";
                Response.AddHeader("Content-Disposition", "attachment;CustomData.xls");

                Response.Charset = "";
                this.EnableViewState = false;

                System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
                System.Web.UI.Html32TextWriter oHtmlTextWriter = new System.Web.UI.Html32TextWriter(oStringWriter);
                gvCustomData.RenderControl(oHtmlTextWriter);

                Response.Write(oStringWriter.ToString());
                Response.End();
            }
        }

        catch (Exception ex)
        {
            Adhoc.msg(this, "Error: " + ex.Message);
        }
    }

推荐答案

您可以在此链接中找到一些答案。



http://support.microsoft.com/kb/312629/en-us [ ^ ]

You may find some answers in this link.

http://support.microsoft.com/kb/312629/en-us[^]

只需删除它可以使用的Try Catch Block。

Just Remove the Try Catch Block it will work.

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