Hello Louis ,
Initially, when a data source is assigned to RadComboBox.DataSource
property, there is no selected item. Then you can use SelectedIndex
properties to select an item. If you want to use SelectedValue
property you should set a priori ValueMember
property to the corresponding data field. If there is no selected item, the SelectedItem
would return null.
Please check your implementation meets the necessary conditions. If it seems to be ok, please try to reproduce the problem in a small sample application and send it to us so we can examine it and find where is the problem.
the Telerik team