ThreadAbortException (WebClient using DownloadFile to grab file from server)

Referencing my Earlier Question, regarding downloading a file from a server and handling exceptions properly. I am positive that I had this solved, then in classic programming fashion, returned days later to frustratingly find it broken :-(

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Updated code:

private static void GoGetIt(HttpContext context)
    {
        var directoryInfoOfWhereTheDirectoryFullOfFilesShouldBe = new FileInfo(......);
                var name = SomeBasicLogicToDecideName();

            //if (!directoryInfoOfWhereTheDirectoryFullOfFilesShouldBe.RefreshExists())
            //{
            //  throw new Exception(string.Format("Could not find {0}.", name));
            //}

            var tempDirectory = ""; //Omitted - creates temporary directory

            try
            {
                directoryInfoOfWhereTheDirectoryFullOfFilesShouldBe.CopyAll(tempDirectory);
                var response = context.Response;
                response.ContentType = "binary/octet-stream";
                response.AddHeader("Content-Disposition", string.Format("attachment;filename={0}.zip", name));
                ZipHelper.ZipDirectoryToStream(tempDirectory, response.OutputStream);
                response.End();
            }
            catch (Exception ex)
            {
                Debug.WriteLine(ex.ToString());
                context.Response.StatusCode = 404;
            }
            finally
            {
                tempDirectory.DeleteWithPrejudice();
            }
        }

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This was working fine, and returning the zip, otherwise if the file didn't exist returning 404. Then on the client side I could handle this:

public bool Download()
{   
 try
                {
                    using (var client = new WebClient())
                    {
                        client.DownloadFile(name, tempFilePath);
                    }

                }
                catch (Exception)
                {
                    fileExists = false;
                }
return fileExists;
    }

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But the problem now is two things.

1) I get System.Threading.ThreadAbortException: Thread was being aborted in the server side try-catch block. Usually this was just a file not found exception. I have no idea what or why that new exception is throwing?

2) Now that a different exception is throwing on the server side instead of the file not found, it would seem I can't use this set u开发者_如何学Pythonp for the application, because back on client side, any exception is assumed to be filenotfound.

Any help, especially info on why this ThreadAbortException is throwing!?!? greatly appreciated. Cheers

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The problem is that Response.End() throws a ThreadAbortException: that's how it ends the request. Just get rid of that call altogether, you don't need it.