Gets or sets a field name in the bound data source whose values are displayed by the editor. This is a dependency property.
A String value that specifies the data source field whose values are displayed by the editor.
To bind the Range Control to a data source, use its RangeControlClientBase.ItemsSource property. The RangeControlClientBase.ValueMember property specifies the field name in the bound data source whose values are represented by the editor.