两个控件这间的数据绑定
<dxe:ComboBoxEdit Name="dxeQuantityUnit" DisplayMember="ComboItemName" ValueMember="ComboItemCode" Style="{DynamicResource ResourceKey=CENullStyle}" SelectedItem="{Binding ElementName=cbeDoseUnit, Path=SelectedItem}" SelectedIndexChanged="dxeQuantityUnit_SelectedIndexChanged"/>