无法评估表达式，因为代码已优化或本机框架c＃ [英] unable to evaluate expression because the code is optimized or a native frame c#

问题描述

public void ExportToExcel(DataTable dt, string FileName)
      {
         
              System.Web.HttpContext.Current.Response.Clear();
              System.Web.HttpContext.Current.Response.Buffer = true;
              System.Web.HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=" + FileName + DateTime.Now + ".xls");
              System.Web.HttpContext.Current.Response.Charset = "";
              System.Web.HttpContext.Current.Response.ContentType = "application/text";
              StringBuilder sb = new StringBuilder();
              sb.Append("<table cellSpacing='0' cellPadding='0' align='center' border='1'><tr>");

              for (int k = 0; k <= dt.Columns.Count - 1; k++)

              {

                  //add separator

                  //& sw.ToString() & "</table>")
                  sb.Append("<th align ='Left' width = '50px'>");
                  sb.Append(dt.Columns[k].ColumnName.ToString());
                  sb.Append("</th>");
              }
              sb.Append("</tr>");
              //append new line
              //sb.Append(Constants.vbCr + Constants.vbLf);
              for (int i = 0; i <= dt.Rows.Count - 1; i++)

              {

                  sb.Append("<tr>");
                  for (int k = 0; k <= dt.Columns.Count - 1; k++)

                  {

                      //add separator

                      string retval = dt.Rows[i][k].ToString();

                      sb.Append("<td align ='Left' width = '50px'>");
                      sb.Append(dt.Rows[i][k].ToString().Replace(",", ";"));
                      sb.Append("</td>");
                  }
                  sb.Append("</tr>");
                  //append new line
                  //sb.Append(Constants.vbCr + Constants.vbLf);
              }
              sb.Append("</table>");
              System.Web.HttpContext.Current.Response.Output.Write(sb.ToString());
              System.Web.HttpContext.Current.Response.Flush();
              //HttpContext.Current.ApplicationInstance.CompleteRequest();

              System.Web.HttpContext.Current.Response.End();
          }
         
          }
}

推荐答案

确保没有其他在 Response.End（）之后执行的逻辑。

Response.End（）应该抛出这个设计的异常。 br />
您可以尝试通过调用 ApplicationInstance.CompleteRequest（）而不是 Response.End（）来解决此问题。

示例：

Make sure that there is no other logic to execute after the Response.End().
Response.End() is supposed to throw this exception which is by design.
You can try to resolve this by calling ApplicationInstance.CompleteRequest() instead of Response.End() .
Example:

System.Web.HttpContext.Current.ApplicationInstance.CompleteRequest();

参考：

如果使用响应，则会发生ThreadAbortException。 End，Response.Redirect或Server.Transfer [ ^ ]



希望，它有帮助：）

Reference:
ThreadAbortException Occurs If You Use Response.End, Response.Redirect, or Server.Transfer[^]

Hope, it helps :)

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