c# - AsyncFileUpload does not fire server side UploadComplete -


i have asyncfileupload control inside update panel in page using master page. when select file, client side onclientuploadcomplete fires not server side. searched issue , tried different suggestions, including adding hidden button outside update panel , "click" on client script force async postback modifying "form" tag on master page include encrypt type nothing seems working.

in aspx file have:

<script type="text/javascript">     function onclientuploadcomplete(sender, e) {debugger         var ct = e.get_contenttype();         var fn = e.get_filename();         var l = e.get_length();         var p = e.get_path();         document.getelementbyid('uploadcompleteinfo').innerhtml = '';         __dopostback('upnlnews', '');     }      function onclientuploadstart(sender, e) {         document.getelementbyid('uploadcompleteinfo').innerhtml = 'please wait while uploading ' + e._filename;     } </script>  <asp:updatepanel runat="server" id="upnlnews">     <contenttemplate>         <ajaxtoolkit:asyncfileupload runat="server" id="fuattcheddocs"             throbberid="mythrobber"              uploaderstyle="traditional"              onclientuploadcomplete="onclientuploadcomplete"             onuploadedcomplete="fuattcheddocs_uploadedcomplete"              onuploadedfileerror="fuattcheddocs_uploadedfileerror" />         <asp:label runat="server" id="mythrobber" style="display: none;">            <img align="middle" alt="" src="../assets/images/6.gif" />         </asp:label>         <div id="uploadcompleteinfo"></div><br />     </contenttemplate> </asp:updatepanel>

additional info when put breakpoint in client side script , check variables in chrome developer tool, see following:

function onclientuploadcomplete(sender, e) {debugger     var ct = e.get_contenttype();   ==> ct = ""     var fn = e.get_filename();      ==> fn = "spock.jpg"     var l = e.get_length();         ==> l = "nan"     var p = e.get_path();           ==> p = "c:\fakepath\spock.jpg"     document.getelementbyid('uploadcompleteinfo').innerhtml = '';     __dopostback('upnlnews', ''); }

the fact file length shows nan bit fishy!

i found out ui designer had added search text box , button combo , had contained them in <form>...</form> tag; page 2 <form> tags, 1 contained within other (main page form tag , one). broke code. realized when found regular button not fire onclick event. after changed form tags div worked fine.


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