WPF MVVM TreeView 实现 右键选中 右键菜单

1.非MVVM模式：下载源代码WpfApplication1.zip 

<TreeView Height="200" PreviewMouseRightButtonDown="TreeViewItem_PreviewMouseRightButtonDown" HorizontalAlignment="Left" Margin="12,0,0,0" Name="treeView1" VerticalAlignment="Top" Width="120">

            <TreeViewItem Header="哈哈">

                <TreeViewItem Header="呵呵"/>

                <TreeViewItem Header="嘿嘿" />

                <TreeViewItem Header="哈哈哈哈" />

            </TreeViewItem>

            <TreeViewItem Header="呵呵">

                <TreeViewItem Header="呵呵呵呵" />

                <TreeViewItem Header="呵呵呵呵呵呵" />

            </TreeViewItem>

            <TreeView.ContextMenu>

                <ContextMenu>

                    <MenuItem Header="点我" Name="miClickMe" Click="miClickMe_Click"/>

                    <MenuItem Header="别点我" Name="miDontClickMe" Click="miDontClickMe_Click"/>

                </ContextMenu>

            </TreeView.ContextMenu>

        </TreeView>

XAML

  private void TreeViewItem_PreviewMouseRightButtonDown(object sender, MouseButtonEventArgs e)

        {

            var treeViewItem = VisualUpwardSearch<TreeViewItem>(e.OriginalSource as DependencyObject) as TreeViewItem;

            if (treeViewItem != null)

            {

                treeViewItem.Focus();

                e.Handled = true;

            }

        }



        static DependencyObject VisualUpwardSearch<T>(DependencyObject source)

        {

            while (source != null && source.GetType() != typeof(T))

                source = VisualTreeHelper.GetParent(source);



            return source;

        }



        private void miClickMe_Click(object sender, RoutedEventArgs e)

        {

            var node = treeView1.SelectedItem as TreeViewItem;

            MessageBox.Show("点我" + node.Header);

        }



        private void miDontClickMe_Click(object sender, RoutedEventArgs e)

        {

            var node = treeView1.SelectedItem as TreeViewItem;

            MessageBox.Show("别点我" + node.Header);

        }

C#

 

2.MVVM模式： 下载源代码MVVM模式.zip

1)添加引用：System.Windows.Interactivity.dll。

　　添加引用→程序集→扩展。 下载dll

2）添加MVVMLight引用：GalaSoft.MvvmLight.Extras.WPF4.dll 下载dll

3）添加Prism框架引用：Microsoft.Practices.Prism.dll 下载dll

<Window x:Class="WpfApplication1.MainWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

            xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"

             xmlns:cmd="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras.WPF4"

        Title="MainWindow" Height="350" Width="525">

    <Grid>

        <TreeView Height="200" HorizontalAlignment="Left" Margin="12,0,0,0" Name="treeView1" VerticalAlignment="Top" Width="120">

            <TreeViewItem Header="哈哈">

                <TreeViewItem Header="呵呵"/>

                <TreeViewItem Header="嘿嘿" />

                <TreeViewItem Header="哈哈哈哈" />

            </TreeViewItem>

            <TreeViewItem Header="呵呵">

                <TreeViewItem Header="呵呵呵呵" />

                <TreeViewItem Header="呵呵呵呵呵呵" />

            </TreeViewItem>

            <TreeView.ContextMenu>

                <ContextMenu>

                    <MenuItem Header="点我" Name="miClickMe" />

                    <MenuItem Header="别点我" Name="miDontClickMe"/>

                </ContextMenu>

            </TreeView.ContextMenu>

            <i:Interaction.Triggers>

                <i:EventTrigger EventName="PreviewMouseRightButtonDown">

                    <cmd:EventToCommand Command="{Binding SelectTreeNodeCommand}" PassEventArgsToCommand="True" />

                </i:EventTrigger>

            </i:Interaction.Triggers>

        </TreeView>

    </Grid>

</Window>

XAML

public class MainViewModel:NotificationObject

    {

        public ICommand SelectTreeNodeCommand { get; set; }



        public MainViewModel()

        {

            SelectTreeNodeCommand = new DelegateCommand<RoutedEventArgs>(SelectTreeNodeCommandExec);

        }



        private void SelectTreeNodeCommandExec(RoutedEventArgs e)

        {

            var treeViewItem = VisualUpwardSearch<TreeViewItem>(e.OriginalSource as DependencyObject) as TreeViewItem;



            if (treeViewItem == null) return;

            treeViewItem.Focus();

            e.Handled = true;

        }



        private static DependencyObject VisualUpwardSearch<M>(DependencyObject source)

        {

            while (source != null && source.GetType() != typeof(M))

            {

                if (source is Visual || source is Visual3D)

                    source = VisualTreeHelper.GetParent(source);

                else

                    source = LogicalTreeHelper.GetParent(source);

            }

            return source;

        }



    }

ViewModel