hi I'm using Accordian control of ajax toolkit.
I'm getting the following error:
Microsoft JScript runtime error: Sys.ArgumentException: Value must not be null for Controls and Behaviors. Parameter name: element
please help me
A:
There could be a whole host of problems associated with this error. Not much to go on, but here are some possibilities
- Check the visibility settings of the Accordion. Apparently if it is set to visible=false or style="display:none" it may not hook to the extender correctly.
- Also check for any commented out Accordion controls (i.e. comment blocks). This may cause the ScriptManager to look for an Accordion that is not there.
- Finally, in case it is not the Accordion throwing the error, make sure each control and its extender are in the same UpdatePanel.
Hope this helps!
Matthew Jones
2009-06-11 13:54:35
I'm not using the update panel.
Aarsh Thakur
2009-06-11 13:56:16
Still, check your visibility settings. Controls with visible=false are not rendered to the page, so the extender cannot find it and, poof!, error. Check this thread for more info: http://forums.asp.net/t/1038420.aspx
Matthew Jones
2009-06-11 14:01:45
A:
We just had this problem as a result of not explicitly setting an ID on an AJAX control. You might want to check that you're setting the ID property.
StriplingWarrior
2009-11-25 23:24:29