<UserControl.Resources>

        <local:StatusConvertor x:Key="StatusConvertor"></local:StatusConvertor>

        <cvt:FullNameConverter x:Key="fullNameConverter"></cvt:FullNameConverter>

        <DataTemplate x:Key="doctorTemplate">

            <TextBlock Text="{Binding .,Converter={StaticResource ResourceKey=fullNameConverter}}" Margin="4,0,0,0"></TextBlock>

        </DataTemplate>

    </UserControl.Resources>

<dxe:ComboBoxEdit Name="comboBoxEdit_Doctor"

                  ApplyItemTemplateToSelectedItem="True"

                  ItemTemplate="{StaticResource ResourceKey=doctorTemplate}"

                  IsTextEditable="False" ShowCustomItems="True"

                  Margin="0,1"  Width="300" HorizontalAlignment="Left"

                 SelectedIndexChanged="comboBoxEdit_Doctor_SelectedIndexChanged" />