I’m having a issue with a RadWindow which contains an UpdatePanel in combination with the RadWindowManager.
When the popup is added during a GET request it throws an error:
Cannot unregister UpdatePanel with ID 'test' since it was not registered with the ScriptManager. This might occur if the UpdatePanel was removed from the control tree and later added again, which is not supported.
When I disable the line: “createRadWindow()” it works and the popup is visible.
Why can’t the popup be created during a GET request?
But I use the RadWindowManager because it recreates the RadWindow from the ViewState in a postback request.
In short I have two questions:
How can I fix this issue? I Need the RadWindowManager to recreate my windows so events for controls on these dialogs work properly.
Why does the popup work when created from a postback and not from a get request.
Below is my sample code