highlight the item with same text if already in itemscontrol collection

Question

18829-xxx.txtHi,

I have two textboxes where user enters prefix and suffix to be appended in already existing itemscontrol of checkboxes. I want the functionality if the name already exists s.t. prefixText+any item+ suffixText then make the existing item red and bold.

Attached file has XAML and ViewModel. (Do I need MultiBinding?)

Edit: attached text file

Many thanks,
Harry

Answer 1

Hi Harry,
check value of DataTrigger to "True" and return true/fasle from Converter.

                <DataTrigger Value="True">  
                  <DataTrigger.Binding>  
                    <MultiBinding Converter="{StaticResource conv}">  
                      <Binding RelativeSource="{RelativeSource Self}" Path="Content"/>  
                      <Binding Path="Text" ElementName="prefixTB"/>  
                      <Binding Path="Text" ElementName="suffixTB"/>  
                    </MultiBinding>  
                  </DataTrigger.Binding>  
                  <Setter Property="Foreground" Value="Red"/>  
                  <Setter Property="FontWeight" Value="DemiBold"/>  
                </DataTrigger>  

Converter:

Or shorter: