WCF Service

[Darren]

I'm loading data from a WCF Service into a RadCombo box.  I think I am having a problem with the call being asynchronous.  If I load the data imediately without calling the service items appear in the dropdown.  If I call the service there isn't.  I check the Observable Collection and it does have data.  I tried calling UpdateLayout after loading the data but it's still empty.  Is there something I should call on the RadComboBox to make it display the items in the dropdown?

[Darren]

I set the ItemsSource instead of the DataContext and now it works.  What exactly is the difference here?

[Miroslav]

Hi Darren ,

The DataContext of an object is what it will bind to. I.e. when you see {Binding SomeName}, SomeName is a property on the object that is given as a DataContext.

The DataContext is inherited through the visual tree.

The ItemsSource on the other hand is an IEnumerable (often a collection or list) that gives the ItemsControl its items.

Best wishes,
Miroslav
the Telerik team

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[Darren]

Thanks Miroslav!