When downloading a file from ASP .Net, the text file gets appended with HTML content

Question

I have made a page that allows users to upload files to the server using a FileUpload Control and handling its event with this code

Sub SaveAttachment()
             


        

Answer 1

Make sure to end your Response by calling Response.End() after Response.WriteFile(filepath) or else your form will be appended to the stream and sent to the client.

It will affect other files as well though most likely only be seen as garbage at the end of the file and ignored by their respective applications.

Answer 2

Is is not safe to use Response.End(), It will always return a System.Threading.ThreadAbortException:.. if debugged and seen in the catch block...

Alternative.. Use the following instead...

Response.Flush();
Response.SuppressContent = true;
Response.WriteFile(filepath);
HttpContext.Current.ApplicationInstance.CompleteRequest();

Answer 3

Response.redirect threw an exception. Shoaib's answer got me closer but it suppressed everything including the valid file content. What worked for me was reordering the statements as follows:

 Response.ContentType = ContentType
 Response.AppendHeader("Content-Disposition", "attachment; filename=" & originalFileName)
 Response.WriteFile(filePath)
 Response.Flush()
 Response.SuppressContent = True
 HttpContext.Current.ApplicationInstance.CompleteRequest()