Single Property bound to multiple controls in WPF
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I have a single property that consists of three letters and two numbers, such as "ABC 12". The requirements for my project ask that the UI divide this into a ComboBox for the three letter combinations and a TextBox for the numerical. I can do this pretty easily using a converters to  parse out the part of the string that I need.

My question is whether there is a way to implement the "ConvertBack" logic in my converter such that I can reset the property based upon the values in the two different controls.

My xaml:

    <ComboBox IsEnabled="{Binding EditMode}" ItemsSource="{Binding AbbrevsList}"      
              DisplayMemberPath="SelectedAbbrev" SelectedValuePath="Abbrev" 
              SelectedValue="{Binding Row.Code, Converter=CodeAlphaConverter, 
                              UpdateSourceTrigger=PropertyChanged}" />
    <TextBox TextAlignment="Left">
         <TextBox.Text>
              <Binding Path="Row.Code" Converter="CodeNumericConverter" 
                       UpdateSourceTrigger="LostFocus">
              </Binding>
          </TextBox.Text>
    </TextBox>

Thanks.