Hi guys,
the error is when I try to create a CollapsiblePanelExtender control type and put the ID gives me an error Sys.ArgumentException: Value must not be null for Controls and Behaviors.
Parameter name: element
I'm trying to create the control in a for loop because I have several controls (Panel) that i would like to expand, control is created successfully but when creating this distorts the tabs
the error is when I try to create a CollapsiblePanelExtender control type and put the ID gives me an error Sys.ArgumentException: Value must not be null for Controls and Behaviors.
Parameter name: element
I'm trying to create the control in a for loop because I have several controls (Panel) that i would like to expand, control is created successfully but when creating this distorts the tabs