Question

<DataTemplate>
  <StackPanel Orientation="Vertical" Name="AddressStackPanel" >
    <ComboBox  Name="ComboBox" ItemsSource="{Binding Path=MatchedAddressList}" DisplayMemberPath="Address" SelectedIndex="0" SelectionChanged="ComboBox_SelectionChanged"/>
    <TextBlock Name="InputtedAddress" Text="{Binding Path=InputtedAddress}"  Foreground={Hopefully pass the UI element to the dataconverter }  />
  </StackPanel>
</DataTemplate>

The ComboBox has addresses matched by from a geodatabase with the highest scoring value selected. The Textblock has the user-inputted address that was used for matching. If the address is the same, I want the foreground to be Green, otherwise Red.

I thought maybe I could pass the entire TextBlock into the dataconverter, get its Parent StackPanel, get child 0, cast to a Combobox get the 0th element and compare, and then return red or green. Is this do-able?

Otherwise I think I have to traverse the visual tree which is just as ugly i think

Answer 1

<DataTemplate>
    <StackPanel Orientation="Vertical" Name="AddressStackPanel" >
        <ComboBox  Name="ComboBox" 
                   ItemsSource="{Binding Path=MatchedAddressList}" 
                   DisplayMemberPath="Address" SelectedIndex="0" 
                   SelectionChanged="ComboBox_SelectionChanged"/>
        <TextBlock Name="InputtedAddress" Text="{Binding Path=InputtedAddress}"  
                   Foreground={"Binding RelativeSource={x:Static RelativeSource.Self}, 
                                Converter={x:StaticResource myConverter}}" />
   </StackPanel>
</DataTemplate> 

Yes. See msdn article