Binding a RadDatePicker to a data source is easy provided you use the DbSelectedDate property.  It works almost like the SelectedDate one, but will not throw an exception when it has been given a null value.

This example demonstrates binding a DataGrid control to a DataTable with dates, containing null values. Binding the date is done via the DbSelectedDateProperty:

<EditItemTemplate>
    <rad:RadDatePicker id="Raddatepicker2" MinDate="2006/1/1" AllowEmpty="True" Runat="server" DbSelectedDate='<%# DataBinder.Eval(Container.DataItem, "Dates") %>'>
    </rad:RadDatePicker>
</EditItemTemplate>