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 = 0; i < 10; i++)
           {
               PropertyNodeItem aa = new PropertyNodeItem()
               {
                   Name="测试"+i,
                   Children = new List<PropertyNodeItem>() {  new PropertyNodeItem(){Name="测试1"+i+i} }
               };
               MyProperty.Add(aa);
           }
       }

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)
       {

       }

完毕~~~