Response.BinaryWrite calls the ASPX page twice

Question

I am trying to open a file in the browser using BinaryWriter. This causes the a dialog window to open and prompt the user to save or open the file. That behavior is fine; however, if I select open, the aspx page is called again and after a long wait the file finally opens.

I set the ContentType

Response.BinaryWrite(binary);
Response.End();
Repsonse.Close();

This behavior only occurs with excel and word files.

Browser IE8

Answer 1

A substitute way of doing the same. You can check it out:

FileInfo fileInfo = new FileInfo(yourFilePath);    
context.Response.Clear();   
context.Response.ContentType = contentType;   //Set the contentType
context.Response.AddHeader("content-disposition", "attachment; filename=" + Path.GetFilename(yourFilePath));   
context.Response.AddHeader("Content-Length", fileInfo.Length.ToString());       
context.Response.TransmitFile(yourFilePath); 

Hope this will help