I have a DataTemplate with a ListView control. This DataTemplate is located in Templates.xaml (which is a ResourceDictionary). Template.xaml is then included into my main UserControl SourceManager.xaml through ResourceDictionary.MergedDictionaries. I want to raise the SelectionChanged event of the DataTemplate's ListView but I want the handler in the code behind to be in SourceManager.xaml.cs.

How can I achieve that?

Templates.xaml:

  x:Class="LawBib.Templates"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

 x:Key="SectionTemplate">
    
         Text="{Binding XPath=@Title}" />
         x:Name="GroupList" ItemsSource="{Binding XPath=Source}">
            
                
                     IsItemsHost="True">

                    
                
            
            
                
                    
                         Source="images/source.png" />
                         Text="{Binding XPath=@Title}" HorizontalAlignment="Center" />
                    
                
            
        
   

SourceManager.xaml:

  x:Class="LawBib.SourceManager"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300" Background="#f5f7f8">
    
        
            
                 Source="Resources.xaml" />
                 Source="Templates.xaml" />
            
        
    
...