TreeView 数据绑定及选中命令处理

昨天接近下班，一个群里面的网友，问treeView绑定后  选中命令怎么来处理，怎么没有效果，而且用MVVM的方式来写；快下班了本来想远程帮他看下，结果就说写个Demo给他看；再加上选中传参；

下面分享下代码：

 <TreeView Height="264" x:Name="tvProperties"  Width="220" ItemsSource="{Binding MyProperty}"><!--数据源-->
             <i:Interaction.Triggers>
                 <i:EventTrigger EventName="SelectedItemChanged">
                     <i:InvokeCommandAction Command="{Binding DataContext.SelectComamnd,
                             RelativeSource={RelativeSource AncestorType=Window, AncestorLevel=1,  Mode=FindAncestor}}" CommandParameter="{Binding SelectedItem, ElementName=tvProperties}"/><!--选中传值-->
                 </i:EventTrigger>
             </i:Interaction.Triggers>
             <TreeView.ItemContainerStyle>
                 <Style TargetType="{x:Type TreeViewItem}">
                     <Setter Property="IsExpanded" Value="{Binding IsExpanded}"></Setter>
                 </Style>
             </TreeView.ItemContainerStyle>
             <TreeView.ItemTemplate>

                 <HierarchicalDataTemplate  ItemsSource="{Binding Path=Children}"><!--节点-->

                     <StackPanel Orientation="Horizontal">

                         <Image VerticalAlignment="Center" Source="{Binding Icon}" Width="16" Height="16" Margin="0,0,2,2"></Image><!--绑定值-->

                         <TextBlock VerticalAlignment="Center" Name="nodeName" Text="{Binding Name}"></TextBlock>

                         <Image VerticalAlignment="Center" Source="{Binding EditIcon}" Margin="2,0,0,0"></Image>

                         <StackPanel.ToolTip>

                             <TextBlock VerticalAlignment="Center" Text="{Binding Name}" TextWrapping="Wrap" MaxWidth="200" ></TextBlock>

                         </StackPanel.ToolTip>

                     </StackPanel>

                 </HierarchicalDataTemplate>

             </TreeView.ItemTemplate>

         </TreeView>

这个绑定完了 咱们来看看数据：

    private List<PropertyNodeItem> myVar;
         /// <summary>
         /// 绑定值
         /// </summary>
         public List<PropertyNodeItem> MyProperty
         {
             get { return myVar ?? (myVar = new List<PropertyNodeItem>()); }
             set
             {
                 myVar = value;
                 this.OnPropertyChanged("MyProperty");
             }
         }
         /// <summary>
         /// 产生数据
         /// </summary>
        public  MainViewModels()
        {
            for (int i = ; i < ; i++)
            {
                PropertyNodeItem aa = new PropertyNodeItem()
                {
                    Name="测试"+i,
                    Children = new List<PropertyNodeItem>() {  new PropertyNodeItem(){Name="测试1"+i+i} }
                };
                MyProperty.Add(aa);
            }
        }

ViewModel Code

接着命令代码：

     private RelayCommand _selectCommand;
        /// <summary>
        /// 事件命令
        /// </summary>
        public RelayCommand SelectComamnd
        {
            get { return _selectCommand ?? (_selectCommand = new RelayCommand(OnSelectComamnd)); }
            set { _selectCommand = value; }
        }
        /// <summary>
        /// 选中事件执行函数
        /// </summary>
        /// <param name="paramter">参数</param>
        private void OnSelectComamnd(object paramter)
        {

        }

ViewModel Code

完毕~~~