我的树视图看起来像这样：
<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>
这是我的点击事件
private void EditProject_Click(object sender, RoutedEventArgs e)
{
//how do I find the bound item of the node this context menu resides on?
}
我正在尝试为ContextMenu MenuItem点击事件编写EditProject_Click事件。当我单击它时，我希望能够找到绑定到上下文菜单所在节点的项目。我该怎么做？
答案
private void EditProject_Click(object sender, RoutedEventArgs e)
{
Project project = (Project)((MenuItem)sender).DataContext;
//Do stuff with the project here
}
另外，如果你想让ContextMenu从ContextMenu附加的元素更新它的DataContext，这里的语法是：
<ContextMenu DataContext="{Binding PlacementTarget.DataContext, RelativeSource={RelativeSource Self}}">
答案 0 :(得分：6)
在点击事件处理程序中，“（发件人为FrameworkElement）.DataContext”会是您要找的吗？
修改
以下示例代码。
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>
代码隐藏：
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;
}
}