执行Response.End()方法时，asp.net中的ThreadAbortException处理 [英] ThreadAbortException handling in asp.net while executing Response.End() method

问题描述

在asp.net中执行 Response.End(); 方法时，它会抛出我在catch块中处理的 ThreadAbortException ，在内捕获块结束后我要执行一些其他代码，但直接跳转到外部catch块.是否由于响应已结束而发生这种情况，并且.net框架不再执行任何其他代码?

While executing Response.End(); method in asp.net it throws ThreadAbortException which I handled in catch block, after end of inner catch block I want to execute some further code but it directly jump to outer catch block. Is This happening because of response has ended and .net framework do not execute any further code?

protected void btn_click(object sender, EventArgs e)
{

    try
    {
        string fileToDownload = MapPath(@"~\Sample.txt");
        string fileToRead = MapPath(@"~\FileNotExist.txt");

        try
        {
            //Section 1
            try
            { 
                // try to read the file which does not exist to raise the exception
                StreamReader ss = new StreamReader(fileToRead);
            }
            catch (IOException IoEx)
            {
                // Just for sample exception
            }

            // Section 2 code block still execute because exception handled by upper try catch block 
            //Section 2

            Response.Clear();
            Response.ClearHeaders();
            Response.AddHeader("Content-Disposition", "attachment;filename=SampleTemplate.txt");
            Response.ContentType = "text";
            Response.WriteFile(fileToDownload);
            Response.Flush();
            Response.End();

        }
        catch (System.Threading.ThreadAbortException abrtEx)
        {
          // do not treat this exception as Exception
        }

        //Section 3 Code block not executing even after exception handeled by ThreadAbortException 
        //Section 3
         string test = "Do futher process after sample downloaded";


    }
    catch (Exception ex) // Outer Catch Block
    {
        throw ex;
    }


}

推荐答案

代替

Response.End()

使用

HttpContext.Current.ApplicationInstance.CompleteRequest()

赞

protected void btn_click(object sender, EventArgs e)
{
    try
    {
        string fileToDownload = MapPath(@"~\Sample.txt");
        string fileToRead = MapPath(@"~\FileNotExist.txt");

        try
        {
            //Section 1
            try
            { 
                // try to read the file which does not exist to raise the exception
                StreamReader ss = new StreamReader(fileToRead);
            }
            catch (IOException IoEx)
            {
                // Just for sample exception
            }

            // Section 2 code block still execute because exception handled by upper try catch block 
            //Section 2

            Response.Clear();
            Response.ClearHeaders();
            Response.AddHeader("Content-Length", fileToDownload.Length.ToString()); 
            Response.AddHeader("Content-Disposition","attachment;filename=SampleTemplate.txt");
            Response.ContentType = "text";
            Response.WriteFile(fileToDownload);
            Response.Flush();
            HttpContext.Current.ApplicationInstance.CompleteRequest();

        }
        catch (System.Threading.ThreadAbortException abrtEx)
        {

        }

        //Section 3 Code block not executing even after exception handeled by ThreadAbortException 
        //Section 3
         string test = "Do futher process after sample downloaded";


    }
    catch (Exception ex) // Outer Catch Block
    {
        throw ex;
    }
}

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