wpf之TreeView绑定

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wpf绑定TreeView，貌似比winForm可能要麻烦一些，不过仔细分析一下，还是很好解决的，最近做了一个项目，正好写了一下，下面把代码贴出来和大家分享一下

首先、需要创建一个节点类，包括节点名称，图片，内容等，另外为了可以增加子节点，在加一个泛型IList,类型就是节点类本身

/// <summary>    /// 节点类    /// </summary>    internal class PropertyNodeItem    {        public string Icon { get; set; }        public string EditIcon { get; set; }        public string DisplayName { get; set; }        public string Name { get; set; }        public int id { get; set; }        public int parentId{get;set;}        public bool IsExpanded { get; set; }        public List<PropertyNodeItem> Children { get; set; }        public PropertyNodeItem()        {            Children = new List<PropertyNodeItem>();        }    }

然后从数据库中读取根节点绑定到treeView中

 //根节点添加到treeVIew中        private void loadTree()        {            tvProperties.Items.Clear();//加载根节点前先清除Treeview控件项            List<PropertyNodeItem> itemList = new List<PropertyNodeItem>();            DataTable  dt=webDict.GetArticles();            DataView dv = dt.DefaultView;            dv.RowFilter = " ClassType='3' and ParentId=0 ";            PropertyNodeItem node = new PropertyNodeItem()            {                DisplayName = dv[0].Row["title"].ToString(),                Name = dv[0].Row["title"].ToString(),                id=Convert.ToInt32(dv[0].Row["id"].ToString()),                parentId=Convert.ToInt32(dv[0].Row["ParentId"].ToString()),                IsExpanded=true                            };            int id =Convert.ToInt32(dv[0]["id"].ToString());            int pid = Convert.ToInt32(dv[0]["ParentId"].ToString());            ForeachPropertyNode(node, id);            itemList.Add(node);                        this.tvProperties.ItemsSource = itemList;        }

然后，在 ForeachPropertyNode方法中，实现了无限极节点

 //无限接循环子节点添加到根节点下面        private void ForeachPropertyNode(PropertyNodeItem node,int pid)        {            DataTable dtDict = webDict.GetArticles();            DataView dvDict = dtDict.DefaultView;            dvDict.RowFilter = " ClassType='3' and ParentId=" + pid;            if (dvDict.Count > 0)            {                foreach (DataRowView view in dvDict)                {                    int id = Convert.ToInt32(view["id"].ToString());                    string name = view["title"].ToString();                    int parentId = Convert.ToInt32(view["ParentId"].ToString());                    PropertyNodeItem childNodeItem = new PropertyNodeItem()                    {                        DisplayName = name,                        Name = name,                        id=id,                        parentId=parentId,                        IsExpanded=false                    };                    ForeachPropertyNode(childNodeItem, id);                    node.Children.Add(childNodeItem);                }            }                  }

如果我们想触发点击节点事件

      //选中节点事件        private void tvProperties_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)        {            PropertyNodeItem item = this.tvProperties.SelectedItem as PropertyNodeItem;            string nodeText= item.Name;          //  MessageBox.Show(nodeText);                    }

前台的xaml文件

 <TreeView Height="264" x:Name="tvProperties" Width="220" SelectedItemChanged="tvProperties_SelectedItemChanged">                <TreeView.ItemContainerStyle>                    <Style TargetType="{x:Type TreeViewItem}">                        <Setter Property="IsExpanded" Value="{Binding IsExpanded}"></Setter>                    </Style>                </TreeView.ItemContainerStyle>                    <TreeView.ItemTemplate>                                  <HierarchicalDataTemplate  ItemsSource="{Binding Path=Children}">                                                <StackPanel Orientation="Horizontal">                                                      <Image VerticalAlignment="Center" Source="{Binding Icon}" Width="16" Height="16" Margin="0,0,2,2"></Image>                            <TextBlock VerticalAlignment="Center" Name="nodeName" Text="{Binding DisplayName}"></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>

可以发现，我们绑定的节点是类型的，到时候都可以转化过去，从而取得相关的值

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