<ContextMenu x:Key="ModeMenu">            <MenuItem Header="添加" Command="{Binding AddCommand}"                      CommandParameter="{Binding ElementName=ModesTree, Path=SelectedItem}">                <MenuItem.Icon>                    <Image Source="../Images/Add.png" Width="16" Height="16" />                </MenuItem.Icon>            </MenuItem>        </ContextMenu>

<HierarchicalDataTemplate x:Key="ModeTemplate" DataType="{x:Type Model:ModeInfo}" ItemsSource="{Binding Path=PlanInfoList}" >             <StackPanel Orientation="Horizontal" ContextMenu="{StaticResource ModeMenu}"                         DataContext="{Binding RelativeSource={RelativeSource TemplatedParent}}">                <Image x:Name="imgStatus" Source="../Images/Add.png" Width="16" Height="16" />                <TextBlock Margin="2,0,0,0" VerticalAlignment="Center" FontWeight="Bold" Text="{Binding ModeName}"  />            </StackPanel>        </HierarchicalDataTemplate>

public class CommandReference : Freezable, ICommand, ICommandSource    {public CommandReference()        {

        }

public static readonly DependencyProperty CommandParameterProperty =          DependencyProperty.Register("CommandParameter",typeof(object),typeof(CommandReference),new PropertyMetadata((object)null));

public object CommandParameter        {get            {return (object)GetValue(CommandParameterProperty);            }set            {                SetValue(CommandParameterProperty, value);            }        }

public static readonly DependencyProperty CommandTargetProperty =           DependencyProperty.Register("CommandTarget",typeof(IInputElement),typeof(CommandReference),new PropertyMetadata((IInputElement)null));

public IInputElement CommandTarget        {get            {return (IInputElement)GetValue(CommandTargetProperty);            }set            {                SetValue(CommandTargetProperty, value);            }        } 

public static readonly DependencyProperty CommandProperty = DependencyProperty.Register("Command", typeof(ICommand), typeof(CommandReference), new PropertyMetadata(new PropertyChangedCallback(OnCommandChanged)));

public ICommand Command        {get { return (ICommand)GetValue(CommandProperty); }set { SetValue(CommandProperty, value); }        }

#region ICommand Members

public bool CanExecute(object parameter)        {if (Command != null)return Command.CanExecute(CommandParameter);return false;        }

public void Execute(object parameter)        {            Command.Execute(CommandParameter);        }

public event EventHandler CanExecuteChanged;

private static void OnCommandChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)        {            CommandReference commandReference = d as CommandReference;            ICommand oldCommand = e.OldValue as ICommand;            ICommand newCommand = e.NewValue as ICommand;

if (oldCommand != null)            {                oldCommand.CanExecuteChanged -= commandReference.CanExecuteChanged;            }if (newCommand != null)            {                newCommand.CanExecuteChanged += commandReference.CanExecuteChanged;            }        }

#endregion

#region Freezable

protected override Freezable CreateInstanceCore()        {throw new NotImplementedException();        }

#endregion    }

<UserControl.Resources><c:CommandReference x:Key="AddModeCommandRef" Command="{Binding Path=AddModeCommand}"/><ContextMenu x:Key="RootMenu" >            <MenuItem Header="添加" Command="{StaticResource AddModeCommandRef}" >                                <MenuItem.Icon>                    <Image Source="../Images/Add.png" Width="16" Height="16" />                </MenuItem.Icon>            </MenuItem>        </ContextMenu><HierarchicalDataTemplate x:Key="ModeTemplate" DataType="{x:Type Model:ModeInfo}" ItemsSource="{Binding Path=PlanInfoList}" >            <StackPanel Orientation="Horizontal" ContextMenu="{StaticResource ModeMenu}" DataContext="{Binding RelativeSource={RelativeSource TemplatedParent}}">                 <Image x:Name="imgStatus" Source="../Images/Add.png" Width="16" Height="16" />                <TextBlock Margin="2,0,0,0" VerticalAlignment="Center" FontWeight="Bold" Text="{Binding ModeName}" />            </StackPanel>        </HierarchicalDataTemplate>

public ICommand AddModeCommand { get; set; }