Sounds like you are having the same issue I had...A basic example giving the control a class, but nothing displays on the form. I opened a ticket and received a response...There is a property reference missing in the 'Getting Started' example. You need to set the EditorCreationmode = CreateByDefault.
The EditorCreationMode property
The EditorCreationMode property is used to define how
RadDataForm creates editors for the public properties of the business
object assigned as CurrentItem. Two options are available:
The CreateByDefault option implies that editors for each public
property will be created unless the property is marged with the
The IgnoreByDefault option implies that editors for each public
property are created as long as the property is marked with the
The EditorCreationMode property is used only when RadDataForm
has no XAML definition of its layout. When the layout of the fields is defined
in XAML the presence or absence of DataField elements for the
corresponding properties defines whether editors will be or will no be created
for the properties.