title: Sending progress message from Server to Client using Ajax
body: <p>I am using UpdatePanel to trigger a button click event, which saves some 100+ files on a designated folder.
  I want the server to update the client about the status and count of files being saved.</p>
  
  <pre><code>protected void btnSave_Click(...){    
    var filesToSave = GetFilesToSave();
    foreach(var fileToSave in filesToSave){
      SaveProcessedFile(fileToSave);//It takes almost 30seconds to save a file
      UpdateStatusOnClient(fileToSave); //Don;t know what should be done here???????????
    }
  }
  </code></pre>
  
  <p>I am looking for some implementation of "UpdateStatusOnClient" from where i can send a desired message to client, or update a label message asynchronously so that the client knows the progress and status of files being saved.</p>
  
  <p>Thanks.</p>