WPF TreeView控件详解

一：静态使用

1.TreeView控件介绍

TreeView简介：父类：ItemsControl —条目控件 MenuItem:HeaderedItemsControl

按层次结构组织数据 TreeViewItem —HeaderedItemsControl

属性介绍

SelectedItem 选择的项 SelectedValue 选择项的值.

SelectedValuePath (string) 菜单名称编号（列名或属性名）

ItemsSource 数据源

TreeViewItem介绍

TreeViewItem —HeaderedItemsControl

ItemsSource IsExpanded true 展开 false（默认）折叠

IsSelected 是否选择

2.具体案例

<Window x:Class="WpfAppTest.TreeViewWindow"        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"        xmlns:local="clr-namespace:WpfAppTest"        mc:Ignorable="d"        Title="TreeViewWindow" Height="450" Width="800">        <Window.Resources>                <Style  TargetType="TreeViewItem">                        <Setter Property="Foreground" Value="Orange"/>                        <Setter Property="FontSize" Value="14"/>                        <Setter Property="Padding" Value="10"/>                        <Setter Property="Background" Value="Transparent"/></Style>        </Window.Resources>        <Grid>                <TreeView Name="tvLsit" HorizontalAlignment="Left" Height="292" Margin="31,25,0,0" VerticalAlignment="Top" Width="330"  SelectedItemChanged="TvLsit_SelectedItemChanged">                                              <TreeViewItem Header="学生管理系统" IsExpanded="True" >                                <TreeViewItem Header="系统管理" IsExpanded="True">                                        <TreeViewItem Header="角色管理" IsSelected="True" Foreground="LightBlue"  />                                        <TreeViewItem Header="用户管理"/>                                        <TreeViewItem Header="菜单管理"/>                                        <TreeViewItem Header="权限管理"/>                                </TreeViewItem>                                <TreeViewItem Header="业务管理" IsExpanded="False">                                        <TreeViewItem Header="采购入库"/>                                        <TreeViewItem Header="销售出库"/>                                </TreeViewItem>                        </TreeViewItem>                </TreeView>
        </Grid></Window>

/// <summary>/// 节点选择响应事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void TvLsit_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e){        var val = e.NewValue as TreeViewItem;        MessageBox.Show(val.Header.ToString());}

二：动态使用

1.TreeView控件介绍

代码创建节点：可后台代码添加节点，并不比xaml代码简洁

多层次数据，构造出来：数据库表、Xml文档、Excel数据

编号名称父节点编号

1 进销存系统 0

2 系统管理 1

3 用户管理 2

动态生成节点树—分层数据模板

DataType 数据模型

ItemsSource 下一级别的数据列表

2.具体案例

<Window x:Class="WpfAppTest.TreeViewWindow2"        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"        xmlns:local="clr-namespace:WpfAppTest"                xmlns:model="clr-namespace:WpfAppTest.Models"        mc:Ignorable="d"        Title="TreeViewWindow2" Height="450" Width="800" Loaded="Window_Loaded">        <Grid>                <TreeView Name="tvList" HorizontalAlignment="Left" Height="210" Margin="55,78,0,0" VerticalAlignment="Top" Width="283" ItemsSource="{Binding MenuList}" SelectedItemChanged="TvList_SelectedItemChanged">                        <TreeView.ItemTemplate>                                <HierarchicalDataTemplate DataType="{x:Type model:MenuItemModel}" ItemsSource="{Binding SubItems}">                                        <TextBlock Text="{Binding MenuName}" VerticalAlignment="Center" />                                </HierarchicalDataTemplate>                        </TreeView.ItemTemplate>                </TreeView>
        </Grid></Window>

namespace WpfAppTest{        /// <summary>        /// TreeViewWindow2.xaml 的交互逻辑        /// </summary>        public partial class TreeViewWindow2 : Window        {                public TreeViewWindow2()                {                        InitializeComponent();                }
                private void Window_Loaded(object sender, RoutedEventArgs e)                {                        //代码添加节点---并不比xaml代码简洁                        {                                //TreeViewItem ti = new TreeViewItem();                                //ti.Header = "进销存管理系统";                                //tvList.Items.Add(ti);
                                根节点下添加三个子节点                                //TreeViewItem ti1 = new TreeViewItem();                                //ti1.Header = "系统管理";                                //ti.Items.Add(ti1);                                //TreeViewItem ti2 = new TreeViewItem();                                //ti2.Header = "业务管理";                                //ti.Items.Add(ti2);                                //TreeViewItem ti3 = new TreeViewItem();                                //ti3.Header = "查询中心";                                //ti.Items.Add(ti3);
                                系统管理节点下添加4个子节点                                //TreeViewItem ti11 = new TreeViewItem();                                //ti11.Header = "用户管理";                                //ti1.Items.Add(ti11);                                //TreeViewItem ti12 = new TreeViewItem();                                //ti12.Header = "角色管理";                                //ti1.Items.Add(ti12);                                //TreeViewItem ti13 = new TreeViewItem();                                //ti13.Header = "菜单管理";                                //ti1.Items.Add(ti13);                                //TreeViewItem ti14 = new TreeViewItem();                                //ti14.Header = "权限管理";                                //ti1.Items.Add(ti14);                        }
                        {                                List<MenuInfo> allMenus = GetMenuList();//基础菜单数据                                List<MenuItemModel> menuList = new List<MenuItemModel>();//目标菜单数据                                AddAllMenus(allMenus, menuList, null, 0);                                VMenuModel vmodel = new VMenuModel();                                vmodel.MenuList = menuList;                                this.DataContext = vmodel;//当前Window的数据上下文                        }                           }
                /// <summary>                /// 递归加载菜单项数据                /// </summary>                /// <param name="allMenus"></param>                /// <param name="menusList"></param>                /// <param name="pMenu"></param>                /// <param name="parentId"></param>                private void AddAllMenus(List<MenuInfo> allMenus, List<MenuItemModel> menusList, MenuItemModel pMenu, int parentId)                {                        var subList = allMenus.Where(m => m.ParentId == parentId);                        foreach (var mi in subList)                        {                                MenuItemModel miInfo = new MenuItemModel();                                miInfo.MenuId = mi.MenuId;                                miInfo.MenuName = mi.MenuName;                                if (pMenu != null)                                        pMenu.SubItems.Add(miInfo);                                else                                        menusList.Add(miInfo);                                AddAllMenus(allMenus, menusList, miInfo, mi.MenuId);                        }                }
                /// <summary>                /// 获取菜单数据                /// </summary>                /// <returns></returns>                private List<MenuInfo> GetMenuList()                {                        string sql = "select MenuId,MenuName,ParentId from MenuInfos";                        SqlDataReader dr = SqlHelper.ExecuteReader(sql, 1);                        List<MenuInfo> list = new List<MenuInfo>();                        while (dr.Read())                        {                                MenuInfo menu = new MenuInfo();                                menu.MenuId = (int)dr["MenuId"];                                menu.MenuName = dr["MenuName"].ToString();                                menu.ParentId = (int)dr["ParentId"];                                list.Add(menu);                        }                        dr.Close();                        return list;                }
                private void TvList_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)                {                        //响应操作                        var val = e.NewValue as MenuItemModel;//                        MessageBox.Show(val.MenuName);                }        }}public class VMenuModel{        /// <summary>        /// Menu控件的数据源属性        /// </summary>        public List<MenuItemModel> MenuList { get; set; }}
public class MenuInfo{    public int MenuId { get; set; }    public string MenuName { get; set; }    public int ParentId { get; set; }    public string MKey { get; set; }}

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