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a way to identify your specific update panel on the page on server side

/ Published in: VB.NET
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  1. //logic to identify your update panel Id if there are multiple update panels on your page.
  2.  
  3.  If scriptManager.AsyncPostBackSourceElementID.Equals(upUser.UniqueID) Or 
  4.  
  5.  //logic to identify your the control that generated this post back.
  6.  
  7. scriptManager.AsyncPostBackSourceElementID.Equals(cmdFilterUser.UniqueID) Or 
  8.  
  9. //if you want to identify a specific element exist in this panel like in my case there is gridview naming "ngvAuditHistory"
  10.  
  11. scriptManager.AsyncPostBackSourceElementID.Contains("ngvAuditHistory") 
  12.  
  13. Then
  14.                         If Request.Params("__EVENTARGUMENT") = "0" Then
  15.                //your logic for the __dopostback response

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