title: File upload is not working with AsyncPostBackTrigger in ASP.Net
body: <p>I have one html file upload control to upload the profile picture and I'm using update panel and AsyncPostBackTrigger trigger. If I use PostBackTrigger then uploading of profile image works but If I use AsyncPostBackTrigger then uploading doesn't work.</p>
  
  <p>Below is my code inline:</p>
  
  <pre><code>&lt;asp:UpdatePanel ID="pnlZerkerBasicProfile" runat="server"&gt;
  &lt;input type="file" id="myFile" name="myFile" class="file_input_hidden" onchange="javascript:FileUploadSubmit();" style="cursor: pointer;" /&gt;
  &lt;Triggers&gt;
          &lt;asp:AsyncPostBackTrigger ControlID="btnSaveProfilePicture" /&gt;
  &lt;/Triggers&gt;
  &lt;/asp:UpdatePanel&gt;
  </code></pre>
  
  <p>Can anyone help?</p>