title: asp.net C# uploading big file and processing it
body: <p>I want to be able to upload file from my .aspx page to my web server so that it can be preocessed into a different format.</p>
  
  <p>e.g. user will upload a doc and in few seconds it would see a pdf version of the doc on the web page.</p>
  
  <p>I have web service available which can convert doc to pdf.</p>
  
  <p>now</p>
  
  <p>1- how do i automate upload + conversion process.</p>
  
  <p>2- how do i handle big files here.</p>
  
  <p>3- how not to make user wait for all this thing to happen.</p>