Silverlight 4：TreeView/HierarchicalDataTemplate /選択されたノード/リーフの問題を取得

Question

<sdk:TreeView x:Name="tvPageManager" SelectedItemChanged="tvPageManager_SelectedItemChanged" Style="{StaticResource PageManagerStyle}"          
         ScrollViewer.HorizontalScrollBarVisibility="Hidden" ScrollViewer.VerticalScrollBarVisibility="Auto"> 
         <sdk:TreeView.ItemTemplate> 
          <sdk:HierarchicalDataTemplate ItemsSource="{Binding KeyPoints, Mode=TwoWay}"> 
           <StackPanel Orientation="Horizontal"> 
            <ToolTipService.ToolTip> 
             <ToolTip Content="{Binding PageName}" Style="{StaticResource ToolTipStyle}"/> 
            </ToolTipService.ToolTip> 
            <Image x:Name="imgPageIcon" Source="{Binding PageIconImage}" Style="{StaticResource PageIconStyle}" MouseLeftButtonDown="imgPageIcon_MouseLeftButtonDown" Tag="{Binding BurstPageId, Mode=TwoWay}" /> 
            <TextBlock x:Name="tbkLiteralTextPage" Text="Page " Style="{StaticResource PageNameLiteralTextBlockStyle}" /> 
            <TextBox x:Name="tbPageName" Text="{Binding PageName, Mode=TwoWay}" Style="{StaticResource PageNameTextBoxStyle}" TextChanged="tbPageName_TextChanged" /> 
           </StackPanel> 
           <sdk:HierarchicalDataTemplate.ItemTemplate> 
            <DataTemplate> 
             <StackPanel Orientation="Horizontal"> 
              <Image x:Name="imgKeypointIcon" Source="../Assets/Images/bullet_yellow.png" Style="{StaticResource KeypointIconStyle}"/> 
              <TextBlock x:Name="tbkKeypointTitle" Text="{Binding Title, Mode=TwoWay}" Style="{StaticResource KeypointNameTextBlockStyle}" /> 
              <StackPanel x:Name="spnlMoveImages" Orientation="Horizontal" HorizontalAlignment="Right" Width="30"> 
               <Image x:Name="imgMoveUp" Source="../Assets/Images/up_arrow.png" Style="{StaticResource MoveIconsStyle}" MouseLeftButtonDown="imgMoveUp_MouseLeftButtonDown" Tag="{Binding KeyPointId}"/> 
               <Image x:Name="imgMoveDn" Source="../Assets/Images/down_arrow.png" Style="{StaticResource MoveIconsStyle}" MouseLeftButtonDown="imgMoveDn_MouseLeftButtonDown" Tag="{Binding KeyPointId}"/> 
              </StackPanel> 
             </StackPanel> 
            </DataTemplate> 
           </sdk:HierarchicalDataTemplate.ItemTemplate> 
          </sdk:HierarchicalDataTemplate> 
         </sdk:TreeView.ItemTemplate> 
        </sdk:TreeView>  

for above XAML、私はプログラムによって、選択されたノードまたはリーフを知る必要がありますか？

現在のノードがパラメータ（e.NewValue）として渡されるので、あなたはすでに「tvPageManager_ SelectedItemChanged」選択イベントをキャッチしている

Answer 1

：

private void tvPageManager_SelectionChanged(object sender, RoutedPropertyChangedEventArgs<Object> e) 
{ 
    //Perform actions when SelectedItem changes 
    MessageBox.Show(((TreeViewItem) e.NewValue).Header.ToString()); 
} 

Answer 2

ハイテックマジック、 私は十分に私の質問を説明ないため申し訳ありません私は解決策を見つけました。

private void ExpandNodeAndSelectChild() 
    { 
     if (branchSelector < 1 || leafSelector < 1) 
      return; 

     TreeViewItem item = null; 
     int itemAtIndex = 0; 

     //Update tree layout 
     this.tvName.UpdateLayout(); 

     foreach (var branch in this.tvName.Items) 
     { 
      item = (this.tvName.GetContainerFromItem(this.tvName.Items[itemAtIndex]) as TreeViewItem); 
      if (item != null && item.HasItems) 
      { 
       if ((branch as Model.BranchBusinessObject).Id== branchSelector && (!item.IsExpanded)) 
        item.IsExpanded = true; 

       foreach (var leaf in item.Items) 
       { 
        item = (this.tvName.GetContainerFromItem(leaf as Model.LeafBusinessObject) as TreeViewItem); 
        if (item != null && ((leaf as Model.LeafBusinessObject).Id== leafSelector)) 
        { 
         item.IsSelected = true; 
         break; 
        }       
       } 
      } 
      itemAtIndex++; 
     } 
    }