Use ComboBox in DataForm with DataServices in Silverlight 4

I have this scenario when I want to show user object in DataForm, in this user there is one ComboBox which show UserType. 

this is the Table Structure, which show the connection between PP_User and DD_UserType.
The final result is going to be like this:

Here is the XAML code:

Note: you can replace RadComboBox with normal ComboBox.

Create the Converter:

Method to GetUsers and Fill the DataForm with the result from this GetUsers

then GetUserType Method to get UserType data and fill it into combobox:

That’s it you’re done. Hope this help, this is my first attempt to write :) just email me if something not clear: at jlukmanh at yahoo dot com