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+1  Q: 

DataKeyNames with subclassed property?

Is it possible to set a DataKeyNames property in a gridview/listview to a subclassed property?

For example if I have a Product business object that has a Category object as a property...

DataKeyNames="ProductID, Category.ID"

doesn't seem to work. ProductID alone works fine. A hidden field with #Eval("Code.CodeName") works but DataKeyNames should as well!

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