title: How to get selected item of a nested listview?
body: <p>i have a nested listview, i can bind the selected item of the basic listview to my viewmodel but not my selected item of the nested listview ( in the basic listview ) I just do:
  this is my listview:</p>
  
  <pre><code>      &lt;ListView Height="155" ScrollViewer.CanContentScroll="True" ScrollViewer.VerticalScrollBarVisibility="Visible"   dd:DragDrop.IsDragSource="True" 
    dd:DragDrop.IsDropTarget="False" Margin="24,506,280,169" Background="#CDC5CBC5"
                   dd:DragDrop.DropHandler="{Binding}" SelectedItem ="{Binding Path=SelectedCluster,UpdateSourceTrigger=PropertyChanged,Mode=TwoWay}" ItemsSource="{Binding Path=Clusters,UpdateSourceTrigger=PropertyChanged,Mode=TwoWay}" &gt;
              &lt;ListView.View&gt;
                  &lt;GridView&gt;
                      &lt;GridView.Columns&gt;
                          &lt;GridViewColumn Header="Titel" DisplayMemberBinding="{Binding Title}"/&gt;
                          &lt;GridViewColumn Header="Questions"&gt;
                              &lt;GridViewColumn.CellTemplate&gt;
                                  &lt;DataTemplate&gt;
                                      &lt;ListView DataContext="{Binding}" ItemsSource="{Binding ExaminationQuestions}" SelectedItem="{Binding Path=SelectedExaminationQuestionInCluster,UpdateSourceTrigger=PropertyChanged,Mode=TwoWay}"&gt;
                                          &lt;ListView.View&gt;
                                              &lt;GridView&gt;
                                                  &lt;GridViewColumn Header="Description" DisplayMemberBinding="{Binding Question.Description}"/&gt;
  
  
                                              &lt;/GridView&gt;
                                          &lt;/ListView.View&gt;
                                      &lt;/ListView&gt;
                                  &lt;/DataTemplate&gt;
                              &lt;/GridViewColumn.CellTemplate&gt;
                          &lt;/GridViewColumn&gt;
                      &lt;/GridView.Columns&gt;
                  &lt;/GridView&gt;
              &lt;/ListView.View&gt;
          &lt;/ListView&gt;
  </code></pre>
  
  <p>Viewmodel:</p>
  
  <pre><code>public ExaminationQuestion SelectedExaminationQuestionInCluster
          {
              get { return selectedExaminationQuestionInCluster; }
              set { selectedExaminationQuestionInCluster = value;
              OnPropertyChanged("SelectedExaminationQuestionInCluster");
              }
          }
  </code></pre>
  
  <p>Someone who knows what i am doing wrong? If i set a breakpoint of the setter of selecteditem of the second listview. He just ignores that..</p>
  
  <p>Thanks</p>