javascript - SaveFileDialog disables webpart buttons in Sharepoint using C# -

i have button opens savefiledialog save downloaded file clients pc.

after save file, or press cancel, buttons on web-part becomes unresponsive.

why happen, , how can fix it?

code webpart (i tried javascript aswell, no success, still same problem)

datatable table = populatedatatable(selectquery);  system.web.httpresponse response = system.web.httpcontext.current.response;  response.clearcontent(); response.clear(); response.contenttype = "text/plain"; response.appendheader("content-disposition", "attachment;filename=ethicsfeedexport " + datetime.now.tostring("yyyy-mm-dd") + "s.cv");  stringbuilder sb = new stringbuilder(); \\populate sb  response.write(sb.tostring()); response.flush(); response.end(); 

ruan,

i had issues similar experiencing. reason sharepoint doesn't allow multiple postbacks. take @ link stackoverflow question no controls postback after using export csv method .

hope helps.