Home / Community & Support / Developer Productivity Tools Forums / ASP.NET AJAX > Ajax > Microsoft JScript runtime error: Unable to set value of the property 'control': object is null or undefined

• Dhaval

  Posted on Feb 8, 2012 (permalink)

  Hi,
  
  I am using cascaded drop down and i have used RadAjaxManager to update the another dropdown, but i am getting the following error while using it :
  
  Microsoft JScript runtime error: Unable to set value of the property 'control': object is null or undefined
  
  Moreover, i have the dropdowns in ascx page and i am calling that ascx in aspx. if i take the dropdowns in aspx it works smoothly.
  
  Help me out on this.
  
  Thanks & Regards,
  Dhaval Shukla

  Reply

• Iana Tsolova Iana Tsolova

  Posted on Feb 9, 2012 (permalink)

  Hello Dhaval,
  
  How is the user controls added to the page, statically or dynamically? Does the error persist if you disable ajax? Do you have any custom javascript either in the user control or on the page and is it possible the error to come from some line there?
  
  Greetings,
  Iana Tsolova
  the Telerik team

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  Reply


• syed

  Posted on May 3, 2012 (permalink)

  I get the same error when i try to enable "Filter by column", in the RadGrid.
  I have a check box to enable or disable this filter. I am using master page with RadScriptManager in it.
  The error I get is in content Page (Although the grid is enabled for filtering, but i get that error twice in during testing in development, but no error when i host it to server or else wehre)
  
  Any help on this would be appreciated (see below the image)...
  
    
  

  Attached files

  • Error-Image.jpg

  Reply

• Iana Tsolova Iana Tsolova

  Posted on May 8, 2012 (permalink)

  Hi syed,
  
  It is hard to tell want is causing the error illustrated in the screenshot. It is too generic and unclear. Can you give us more information on your scenario? What is the grid setup? You can send the markup and code. What actions are triggering the issue?
  To recreate the issue on our side, it is also important to know which version of the controls you are using.
  
  Kind regards,
  Iana Tsolova
  the Telerik team

  If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed now.

  Reply

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