Trouver Bound Point de TreeViewItem de ContextMenu

Question

Je cette Tree View qui ressemble à ceci:

 <TreeView 
       Grid.Column="0" 
       Grid.Row="2" 
       MinHeight="100" 
       MinWidth="100" 
       BorderBrush="White" 
       DataContext="{Binding Projects, Source={x:Static SizingApp:Manager.Instance}}"> 
       <TreeView.Resources> 
        <Style TargetType="TreeViewItem"> 
         <Setter Property="IsExpanded" Value="True" /> 
        </Style> 
        <DataTemplate x:Key="LoadTemplate"> 
         <TextBlock Text="{Binding Name}"> 
          <TextBlock.ContextMenu> 
           <ContextMenu> 
            <MenuItem InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Edit_InputGestureText}"> 
             <MenuItem.Header> 
              <TextBlock Text="{Binding Path=Name, 
                      StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Edit_Header}}" /> 
             </MenuItem.Header> 
            </MenuItem> 
            <MenuItem> 
             <MenuItem.Header> 
              <TextBlock Text="{Binding Path=Name, 
                      StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Save_Header}}" /> 
             </MenuItem.Header> 
            </MenuItem> 
            <MenuItem> 
             <MenuItem.Header> 
              <TextBlock Text="{Binding Path=Name, 
                      StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Export_Header}}" /> 
             </MenuItem.Header> 
            </MenuItem> 
            <MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Copy_Header}" 
                    InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Copy_InputGestureText}"/> 
            <MenuItem InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Remove_InputGestureText}"> 
             <MenuItem.Header> 
              <TextBlock Text="{Binding Path=Name, 
                      StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=load_ContextMenu_Remove_Header}}" /> 
             </MenuItem.Header> 
            </MenuItem> 
           </ContextMenu> 
          </TextBlock.ContextMenu> 
         </TextBlock> 
        </DataTemplate> 
        <HierarchicalDataTemplate x:Key="StepTemplate" 
          ItemsSource="{Binding Loads}" 
          ItemTemplate="{StaticResource LoadTemplate}"> 
         <TextBlock Text="{Binding Name}"> 
          <TextBlock.ContextMenu> 
           <ContextMenu> 
            <MenuItem InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Edit_InputGestureText}"> 
             <MenuItem.Header> 
              <TextBlock Text="{Binding Path=Name, 
                   StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Edit_Header}}" /> 
             </MenuItem.Header> 
            </MenuItem> 
            <MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Copy_Header}" 
                 InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Copy_InputGestureText}" /> 
            <MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Paste_Header}" 
                 InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Paste_InputGestureText}" /> 
            <MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Import_Load_Header}" /> 
            <MenuItem> 
             <MenuItem.Header> 
              <TextBlock Text="{Binding Path=Name, 
                   StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Export_Header}}" /> 
             </MenuItem.Header> 
            </MenuItem> 
            <MenuItem InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Remove_InputGestureText}"> 
             <MenuItem.Header> 
              <TextBlock Text="{Binding Path=Name, 
                   StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Remove_Header}}" /> 
             </MenuItem.Header> 
            </MenuItem> 
            <MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=step_ContextMenu_Add_Load_Header}" 
                 ItemsSource="{StaticResource mnuLoadSubmenuCommon}"/> 
           </ContextMenu> 
          </TextBlock.ContextMenu> 
         </TextBlock> 
        </HierarchicalDataTemplate> 
        <HierarchicalDataTemplate x:Key="ProjectTemplate" 
          ItemsSource="{Binding Steps}" 
          ItemTemplate="{StaticResource StepTemplate}"> 
         <TextBlock Text="{Binding Name}"> 
          <TextBlock.ContextMenu> 
           <ContextMenu> 
            <MenuItem InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Edit_InputGestureText}" 
               Click="EditProject_Click"> 
             <MenuItem.Header> 
              <TextBlock Text="{Binding Path=Name, 
                StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Edit_Header}}" /> 
             </MenuItem.Header> 
            </MenuItem> 
            <MenuItem> 
             <MenuItem.Header> 
              <TextBlock Text="{Binding Path=Name, 
                StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Save_Header}}" /> 
             </MenuItem.Header> 
            </MenuItem> 
            <MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Copy_Header}" 
              InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Copy_InputGestureText}" /> 
            <MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Paste_Header}" 
              InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Paste_InputGestureText}" /> 
            <MenuItem InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Remove_InputGestureText}"> 
             <MenuItem.Header> 
              <TextBlock Text="{Binding Path=Name, 
                StringFormat={Resx ResxName=PSSPECApplication.Controls.ProjectControlResources,Key=project_ContextMenu_Remove_Header}}" /> 
             </MenuItem.Header> 
            </MenuItem> 
            <MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources, Key=projectTree_Project_AddStep_Header}" /> 
            <MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources, Key=projectTree_Project_ImportStep_Header}" /> 
           </ContextMenu> 
          </TextBlock.ContextMenu> 
         </TextBlock> 
        </HierarchicalDataTemplate> 
       </TreeView.Resources> 
       <TreeViewItem 
         Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources, Key=projectTree_Header}" 
         ItemsSource="{Binding}" 
         IsExpanded="True" 
         ItemTemplate="{StaticResource ProjectTemplate}"> 
        <TreeViewItem.ContextMenu> 
         <ContextMenu> 
          <MenuItem Header="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources, Key=projectTree_Paste_Header}" 
            InputGestureText="{Resx ResxName=PSSPECApplication.Controls.ProjectControlResources, Key=projectTree_Paste_InputGestureText}" /> 
         </ContextMenu> 
        </TreeViewItem.ContextMenu> 
       </TreeViewItem> 
      </TreeView> 

Et voici mon événement click

private void EditProject_Click(object sender, RoutedEventArgs e) 
    { 
     //how do I find the bound item of the node this context menu resides on? 
    } 

Je suis en train d'écrire l'événement EditProject_Click pour la ContextMenu MenuItem cliquez sur l'événement. Lorsque je clique dessus, je veux être capable de trouver l'élément lié au nœud que le menu contextuel réside. Comment je fais ça?

---

La réponse

private void EditProject_Click(object sender, RoutedEventArgs e) 
    { 
     Project project = (Project)((MenuItem)sender).DataContext; 

     //Do stuff with the project here 
    } 

, si vous voulez également obtenir votre ContextMenu mettre à jour c'est DataContext de l'élément ContextMenu est supposé être attaché à, voici la syntaxe que:

<ContextMenu DataContext="{Binding PlacementTarget.DataContext, RelativeSource={RelativeSource Self}}"> 

Answer 1

Dans le gestionnaire d'événements click, "(expéditeur en tant que FrameworkElement) .DataContext" correspondrait-il à ce que vous recherchez?

EDIT:

Exemple de code ci-dessous.

XAML:

<Window x:Class="WpfApplication3.MainWindow" 
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
     xmlns:v="clr-namespace:WpfApplication3" 
     Title="MainWindow" Height="350" Width="525"> 
    <Window.Resources> 
     <DataTemplate x:Key="template"> 
      <TextBlock Text="{Binding}"> 
       <TextBlock.ContextMenu> 
        <ContextMenu> 
         <MenuItem Header="Test" Click="MenuItem_Click"/> 
        </ContextMenu> 
       </TextBlock.ContextMenu> 
      </TextBlock> 
     </DataTemplate> 
    </Window.Resources> 
    <DockPanel> 
     <Button DockPanel.Dock="Top" Click="Button_Click">Change Context</Button> 

     <TreeView x:Name="tv" ItemTemplate="{StaticResource template}"/> 

    </DockPanel> 

</Window> 

code-behind:

public partial class MainWindow : Window 
{ 
    bool flag = false; 
    public MainWindow() 
    { 
     InitializeComponent(); 
     List list = new List() { "A", "B", "C", "D" }; 
     this.tv.ItemsSource = list; 
    } 
    private void MenuItem_Click(object sender, RoutedEventArgs e) 
    { 
     MessageBox.Show((sender as MenuItem).DataContext.ToString()); 
    } 
    private void Button_Click(object sender, RoutedEventArgs e) 
    { 
     if (flag) 
     { 
      List list = new List() { "A", "B", "C", "D" }; 
      this.tv.ItemsSource = list; 
     } 
     else 
     { 
      List list = new List() { 1, 2, 3, 4 }; 
      this.tv.ItemsSource = list; 
     } 
     flag = !flag; 
    } 

}