关于WPF TreeView我的一点心得

首先我的样式操作：
文件名是：TreeViewStyle

 <Style x:Key="DefaultTreeViewItem" TargetType="{x:Type TreeViewItem}">         <Setter Property="MinHeight" Value="40" />         <Setter Property="Foreground" Value="#333233" />         <!--<Setter Property="Background" Value="#484C7F" />-->         <Setter Property="SnapsToDevicePixels" Value="True" />         <Setter Property="Cursor" Value="Hand" />         <Setter Property="Margin" Value="5,0,5,0" />         <Setter Property="FontSize" Value="14" />         <!--<EventSetter Event="PreviewMouseLeftButtonDown" Handler="TreeViewItem_Click" />-->         <!--<Setter Property="local:ControlAttachProperty.FIconSize" Value="19"/>-->         <Setter Property="Template">             <Setter.Value>                 <ControlTemplate TargetType="{x:Type TreeViewItem}">                     <Grid>                         <Grid.RowDefinitions>                             <RowDefinition/>                             <RowDefinition/>                         </Grid.RowDefinitions>                         <Border x:Name="Bd" Margin="3" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" CornerRadius="4"                                 BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}"                                 MinHeight="{TemplateBinding MinHeight}" UseLayoutRounding="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}">                             <!--多层级间隔，暂缓-->                             <!--<Grid Margin="{Binding Converter={StaticResource LengthConverter}, RelativeSource={x:Static RelativeSource.TemplatedParent}}"-->                             <Grid Margin="{TemplateBinding Margin}">                                 <Grid.ColumnDefinitions>                                     <ColumnDefinition Width="15" />                                     <ColumnDefinition Width="*" />                                     <ColumnDefinition MinWidth="18" Width="Auto" />                                     <ColumnDefinition Width="15" />                                 </Grid.ColumnDefinitions>                                 <!--展开收缩按钮-->                                 <ToggleButton x:Name="ExpanderBtn" Grid.Column="2" HorizontalContentAlignment="Stretch"                                               IsChecked="{Binding Path=IsExpanded, RelativeSource={x:Static RelativeSource.TemplatedParent}, Mode=TwoWay}"                                               ClickMode="Press" >                                     <ToggleButton.Template>                                         <ControlTemplate TargetType="ToggleButton">                                             <Border>                                                 <ContentPresenter VerticalAlignment="Center" HorizontalAlignment="Center" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />                                             </Border>                                         </ControlTemplate>                                     </ToggleButton.Template>                                     <ToggleButton.Content>                                         <TextBlock x:Name="ExpanderIcon" Foreground="#333233" FontFamily="../../Fonts/MyFonts/#iconfont" Grid.Column="1" Text="&#xf104;" FontSize="18" />                                         <!--FontSize="{TemplateBinding local:ControlAttachProperty.FIconSize}" />-->                                     </ToggleButton.Content>                                 </ToggleButton>                                 <!--内容-->                                 <ContentPresenter x:Name="PART_Header" Grid.Column="1" ContentSource="Header"                                                   SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"                                                   HorizontalAlignment="Left"                                                   VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>                             </Grid>                         </Border>                         <!--<ItemsPresenter Grid.Row="1" Margin="18,0,0,0" x:Name="ItemsHost"  SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />-->                          <Border x:Name="MianBan" Grid.Row="1" CornerRadius="4" Margin="5,0,5,0">                             <ItemsPresenter  x:Name="ItemsHost"/>                         </Border>                         <!--Margin="18,0,0,0"-->                     </Grid>                     <ControlTemplate.Triggers>                         <Trigger Property="IsExpanded" Value="False">                             <Setter TargetName="ItemsHost" Property="Visibility" Value="Collapsed" />                         </Trigger>                         <Trigger Property="IsExpanded" Value="True">                             <!--<Setter TargetName="ExpanderIcon" Property="Text" Value="&#xe62d;" />-->                             <Setter TargetName="ExpanderIcon" Property="Text" Value="&#xf107;" />                         </Trigger>                         <Trigger Property="HasItems" Value="False">                             <Setter TargetName="ExpanderIcon" Property="Visibility" Value="Hidden" />                         </Trigger>                         <!--<Trigger Property="IsMouseOver" Value="True">                             <Setter Property="Background" TargetName="Bd" Value="#60636C" />                             <Setter Property="Foreground" TargetName="ExpanderIcon" Value="#FFFFCC" />                             <Setter Property="Foreground" Value="#FFFFCC" />                         </Trigger>-->                         <!--<DataTrigger Binding="{Binding IsGrouping}" Value="1">                             <Setter Property="Background" TargetName="MianBan" Value="#E6E7EF" />                         </DataTrigger>                         <DataTrigger Binding="{Binding IsGrouping}" Value="2">                             <Setter Property="Background" TargetName="MianBan" Value="#CFD0D7" />                         </DataTrigger>-->                         <!--<Trigger Property="IsSelected" Value="True">                             <Setter Property="Background" TargetName="Bd" Value="#60636C" />                             <Setter Property="Foreground" TargetName="ExpanderIcon" Value="#F9DEC1" />                             <Setter Property="Foreground" Value="#F9DEC1" />                         </Trigger>-->                          <!--<MultiTrigger>                                     <MultiTrigger.Conditions>                                         <Condition Property="IsSelected" Value="True" />                                         <Condition Property="Selector.IsSelectionActive" Value="True" />                                     </MultiTrigger.Conditions>                                     <Setter Property="Background" TargetName="Bd" Value="#60636C" />                                     <Setter Property="Foreground" TargetName="ExpanderIcon" Value="red" />                                     <Setter Property="Foreground" Value="#F9DEC1" />                                 </MultiTrigger>-->                         <MultiTrigger>                             <MultiTrigger.Conditions>                                 <Condition Property="IsSelected" Value="True" />                                 <!--<Condition Property="Selector.IsSelectionActive" Value="True" />-->                             </MultiTrigger.Conditions>                             <Setter Property="Background" TargetName="Bd" Value="#60636C" />                             <Setter Property="Foreground" TargetName="ExpanderIcon" Value="#F9DEC1" />                             <Setter Property="Foreground" Value="#F9DEC1" />                         </MultiTrigger>                     </ControlTemplate.Triggers>                 </ControlTemplate>             </Setter.Value>         </Setter>     </Style>       <Style x:Key="TypeTreeStyle" TargetType="TreeView">         <Setter Property="ScrollViewer.CanContentScroll" Value="True" />         <Setter Property="VirtualizingStackPanel.IsVirtualizing" Value="True"></Setter>         <Setter Property="VirtualizingStackPanel.VirtualizationMode" Value="Recycling" />         <Setter Property="ScrollViewer.IsDeferredScrollingEnabled" Value="False" />         <Setter Property="Background"  Value="Transparent"/>         <Setter Property="Padding" Value="0"/>         <!--<EventSetter Event="PreviewMouseLeftButtonDown" Handler="TreeViewItem_PreviewMouseLeftButtonDown" />-->         <Setter Property="ItemContainerStyle" Value="{StaticResource DefaultTreeViewItem}"></Setter>         <Setter Property="ItemsPanel">             <Setter.Value>                 <ItemsPanelTemplate>                     <VirtualizingStackPanel IsItemsHost="True" IsVirtualizing="True" VirtualizationMode="Recycling" Margin="0"/>                 </ItemsPanelTemplate>             </Setter.Value>         </Setter>         <Setter Property="Template">             <Setter.Value>                 <ControlTemplate TargetType="TreeView">                     <ScrollViewer Padding="4" Focusable="False" CanContentScroll="False">                         <ItemsPresenter/>                     </ScrollViewer>                 </ControlTemplate>             </Setter.Value>         </Setter>     </Style>     <Style x:Key="TypeNode" TargetType="TreeViewItem">         <Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}"/>   <!--如果有这个属性可以通过这属性获取到是否选择的状态-->         <Setter Property="FontWeight" Value="Normal"/>         <Setter Property="IsExpanded" Value="True"/> <!--设置直接展开-->         <Style.Triggers>             <Trigger Property="IsSelected" Value="True">                 <Setter Property="FontWeight" Value="Bold"/>                 <Setter Property="Background" Value="Brown"/>             </Trigger>          </Style.Triggers>     </Style>     <HierarchicalDataTemplate x:Key="TypeTreeGroup" ItemsSource="{Binding Children}">         <StackPanel Orientation="Horizontal">             <!--<Image Source="/WpfTutorialSamples;component/Images/user.png" Margin="0,0,5,0" />-->             <!--当然这里可以用Image数据来操作 也可以用binding来绑定对应的图片标示-->             <TextBlock Text="{Binding ThisName}" FontSize="13"/>         </StackPanel>     </HierarchicalDataTemplate> 

我的界面配置：

<Window.Resources>         <ResourceDictionary>             <ResourceDictionary.MergedDictionaries>                 <ResourceDictionary Source="/Styles/TreeViewStyle.xaml"></ResourceDictionary>                 <ResourceDictionary Source="/Styles/ButtonSetStyle.xaml"></ResourceDictionary>                 <!--<ResourceDictionary Source="../../Assets/style/ScrollBarThumbStyle.xaml"></ResourceDictionary>-->             </ResourceDictionary.MergedDictionaries>         </ResourceDictionary>     </Window.Resources> 

然后 关于 treeview 的配置是

<TreeView Name="MainTree"  ItemsSource="{Binding TypeTree}" Style="{StaticResource TypeTreeStyle}" ItemContainerStyle="{StaticResource TypeNode}" ItemTemplate="{StaticResource TypeTreeGroup}" SelectedItemChanged="MainTree_SelectedItemChanged">   </TreeView> 

这个配置必须要 绑定ThisName textbolck 的text 显示 然后
ItemsSource="{Binding Children} 对应就是属性children数据
其中 属性为：

   /// <summary>     /// 栏目表     /// </summary>     public  class MainItemInfos     {                        /// <summary>         ///          /// </summary>          [Description("")]         public int  Id { get; set; }          /// <summary>         /// 编号         /// </summary>          [Description("编号")]         public string ThisNo { get; set; }          /// <summary>         /// 父id         /// </summary>          [Description("父id")]         public int  PId { get; set; }          /// <summary>         /// 当前地址         /// </summary>          [Description("当前地址")]         public string  ThitPath { get; set; }          /// <summary>         /// 当前名称         /// </summary>          [Description("当前名称")]         public string  ThisName { get; set; }          /// <summary>         /// 是否启用         /// </summary>          [Description("是否启用")]         public bool  IsUsed { get; set; }          /// <summary>         /// 数据类型（0，首页，1 栏目，3根栏目）         /// </summary>          [Description("数据类型（0 顶级页，1首页，2 栏目，3根栏目）")]         public EItemType  PathType { get; set; }          /// <summary>         ///          /// </summary>          [Description("")]         public DateTime  CreateDate { get; set; }          /// <summary>         ///          /// </summary>          [Description("")]         public DateTime  Updated { get; set; }         /// <summary>         /// 当前         /// </summary>         public MainItemInfos ParentInfo { get; set; }          /// <summary>         /// 当前所有子数据         /// </summary>         public ObservableCollection<MainItemInfos> Children { get; set; }     } 

另外 从数据库获取来后的list操作

 /// <summary>         /// 获取树结构下所有数据         /// </summary>         /// <param name="ThisInfo"></param>         /// <param name="ThisListAll"></param>         /// <param name="RetureInfolist"></param>         public void GetTreeNodeModel(MainItemInfos ThisInfo, List<MainItemInfos> ThisListAll, ref List<MainItemInfos> RetureInfolist)         {             List<MainItemInfos> ListOut = new List<MainItemInfos>();             IEnumerable<MainItemInfos> ListThisMains = ThisListAll.Where(x => x.PId == ThisInfo.Id);             if (ListThisMains != null && ListThisMains.Count() > 0)             {                 ThisInfo.Children = new System.Collections.ObjectModel.ObservableCollection<MainItemInfos>(ListThisMains);                 RetureInfolist.Add(ThisInfo);                 foreach (MainItemInfos OneInfo in ThisInfo.Children)                 {                      OneInfo.ParentInfo = ThisInfo;                     GetChildren(OneInfo, ThisListAll);                     //GetTreeNodeModel(OneInfo, ThisListAll, ref RetureInfolist);                 }             }         }         /// <summary>         /// 子目录下的文件（这样只有一个List可以只有一个树结构）一一更新         /// </summary>         /// <param name="ThisModel"></param>         /// <param name="ListAll"></param>         public void GetChildren(MainItemInfos ThisModel,List<MainItemInfos> ListAll)         {             if (ListAll != null )             {                 IEnumerable<MainItemInfos> ListThisMains = ListAll.Where(x => x.PId == ThisModel.Id);                  if (ListThisMains!=null &&  ListThisMains.Count() > 0)                 {                     ThisModel.Children = new System.Collections.ObjectModel.ObservableCollection<MainItemInfos>(ListThisMains) ;                     foreach (MainItemInfos OneItem in ThisModel.Children)                     {                         GetChildren(OneItem,ListAll);                     }                 }                              }                    }         /// <summary>         /// 刷新树结构         /// </summary>         public void ReflashNodes()         {             List<MainItemInfos> ListDB = new DAL.DALMainItemInfos().QueryList().ToList();             MainItemInfos ThisZongInfos = ListDB.Where(x => x.PathType == 0).FirstOrDefault();             ListDB.Remove(ThisZongInfos);             List<MainItemInfos> ListBinding = new List<MainItemInfos>();             GetTreeNodeModel(ThisZongInfos, ListDB, ref ListBinding);             if (ListBinding != null)             {                 MainTree.ItemsSource = ListBinding;             }         }