When binding data to the RadComboBox utilizing an Ajax panel, the RadComboBox loses its datasource when used within a master page. The RadComboBox is populated on initial load, but after making a selection, it loses the datasource.
My master page markup:
My content page markup (WebForm1):
My non-master page markup (WebForm2):
My code behind (of both the content and non-master pages):
As you can see, the code is VERY basic. The TagManager is a class that returns the data.
When using the Master Page (WebForm1), you lose the datasource after you make your first selection. If you attempt to click on the drop down arrow, after making your initial selection, the RadComboBox is empty (doesn't even respond to the click).
When using the non Master Page (WebForm2), the datasource is persisted no matter how many times you make a selection in the RadComboBox.
Any thoughts why there is a difference when using a master page?