无法计算表达式,因为代码已优化或本机帧位于调用堆栈之上

Question

我有两个带有onclick事件处理程序的按钮,用于处理grid views页面上两个的信息.每个gv一个按钮.它们位于彼此之上,嵌套在html表结构中.

这些按钮用于将grid日期导出到Excel文档中(请参阅下面的代码)

顶部按钮,grid当click按钮工作正常,但底部的按钮将引发ThreadAbortException: Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack.

我自然而然就是Google-d,但其中一些最重要的结果是处理Response.Redirect()电话而不是电话Response.End().Forums.asp.net上的一个这样的帖子在同一个方法调用上有相同的错误,但解决方案是Response.Redirect()使用错误页面作为参数更改代码- 再次与我的内容无关.

在Microsoft Suport页面上的另一个搜索建议HttpContext.Current.ApplicationInstance.CompleteRequest()替换的解决方案Response.End().我试过这个,错误就消失了,Excel下载弹出也是如此.

所以我不知道从哪里开始.奇怪的是,相同的代码(较少的gridviewid)适用于一个而另一个.这是您的审核代码,我已经标记了错误发生的位置.我想也许我可以产生一个新线程 - 这会减轻这个问题吗？我从来没有做过multi-threaded应用程序,但我正在接受挑战.

<table>
  <tr>
   <td align="left">
     <asp:Button ID="btnExport" runat="server" OnClick="btnExport_Click"
          Text="Export" Visible="false" />
   </td>
  </tr>
  <tr>
   <td>                    
     <asp:Panel runat="server" ID="pnl1" Visible="false">
      <asp:GridView ID="gvCountTotalsCat" runat="server" 
          AutoGenerateColumns="false"
          CellPadding="3" PageSize="25" BackColor="White" BorderColor="MidnightBlue"
          BorderStyle="Groove" BorderWidth="1px" CssClass="TextCompact" 
          GridLines="Vertical"
          OnRowDataBound="gridView_OnRowDataBound"
          EmptyDataText="Your request has returned zero records">
          <Columns>
           <asp:TemplateField>
            <HeaderTemplate>
             <asp:Label runat="server" ID="lblHeader" Text="Cat" />
            </HeaderTemplate>
           <ItemTemplate>
            <asp:Literal ID="litWuc" runat="server" />
           </ItemTemplate>
           </asp:TemplateField>
            <asp:BoundField DataField="Cat Entries" HeaderText="Cat Entries" />
           <asp:TemplateField>
           <HeaderTemplate>
            <asp:Label runat="server" ID="lblHeader" />
           </HeaderTemplate>
           <ItemTemplate>
            <asp:Literal ID="litSum" runat="server" />
           </ItemTemplate>
          </asp:TemplateField>
         </Columns>                                              
        </asp:GridView>
       </asp:Panel>
   </td>
  </tr>
  <tr>
   <td align="left">
    <asp:Button ID="btnExport1" runat="server" OnClick="btnExport_Click1" 
         Text="Export" Visible="false" />
   </td>
  </tr>
  <tr>
   <td>                         
    <asp:Panel runat="server" ID="pnl2" Visible="false">
     <asp:GridView ID="gvCountTotalsCat1" runat="server" 
          AutoGenerateColumns="false"
          AllowPaging="false" CellPadding="3" PageSize="25" BackColor="White"
          BorderColor="MidnightBlue" BorderStyle="Groove" BorderWidth="1px" 
          CssClass="TextCompact" GridLines="Vertical" 
          OnRowDataBound="gridView_OnRowDataBound"
          EmptyDataText="Your request has returned zero records">
          <Columns>
            <asp:TemplateField>
             <HeaderTemplate>
              <asp:Label runat="server" ID="lblHeaderWuc" Text="Wuc" />
             </HeaderTemplate>
            <ItemTemplate>
            <asp:Literal ID="litWuc" runat="server" />
            </ItemTemplate>
           </asp:TemplateField>
           <asp:BoundField DataField="Wuc Entries" HeaderText="Wuc Entries" />
           <asp:TemplateField>
            <HeaderTemplate>
              <asp:Label runat="server" ID="lblHeader" />
            </HeaderTemplate>
            <ItemTemplate>
              <asp:Literal ID="litSum" runat="server" />
            </ItemTemplate>
           </asp:TemplateField>
          </Columns>     
         </asp:GridView>
        </asp:Panel>
       </td>
      </tr>
     </table>



public void btnExport_Click(object sender, System.EventArgs e)
{
    string attachment = string.Empty;
    StringWriter sw = new StringWriter();
    HtmlTextWriter htw = new HtmlTextWriter(sw);

    // Create a form to contain the grid
    HtmlForm frm = new HtmlForm();
    frm.Attributes["runat"] = "server";

    attachment = "attachment; filename=gvCountTotalsCat_" + _selectedSite + ".xls";
    gvCountTotalsCat.Parent.Controls.Add(frm);
    frm.Controls.Add(gvCountTotalsCat);

    Response.ClearContent();
    Response.AddHeader("content-disposition", attachment);
    Response.ContentType = "application/ms-excel";

    frm.RenderControl(htw);

    Response.Write(sw.ToString());

    Response.End();
}



public void btnExport_Click1(object sender, System.EventArgs e)
{
    string attachment = string.Empty;
    StringWriter sw = new StringWriter();
    HtmlTextWriter htw = new HtmlTextWriter(sw);
    Response.Clear();
    Response.ClearHeaders();

    // Create a form to contain the grid
    HtmlForm frm = new HtmlForm();
    frm.Attributes["runat"] = "server";

    attachment = "attachment; filename=gvCountTotalsCat1_" + _selectedSite + ".xls";
    gvCountTotalsCat1.Parent.Controls.Add(frm);
    frm.Controls.Add(gvCountTotalsCat1);

    Response.ClearContent();
    Response.AddHeader("content-disposition", attachment);
    Response.ContentType = "application/ms-excel";

    frm.RenderControl(htw);

    Response.Write(sw.ToString());

    try
    {
 >> Error thrown here >>     Response.End();

    }
    catch (System.Threading.ThreadAbortException lException)
    {
        lException;
    }
}

Answer 1

它破灭了我有一个网格和按钮在一个Update Panel,只有顶部按钮被设置为PostBackTrigger.在我添加第二个<asp:PostBackTrigger ControlID="btnExport1" />并解决问题之后.