当前位置：首页 > news >正文

WPF TreeView 全选/反选/子级选中父级也选中

news 来源：原创 2024/9/20 19:48:16

// TreeView 全选/反选/子级选中父级也选中

CSDN 下载链接

<TreeView Grid.Column="0" Grid.Row="1" Grid.ColumnSpan="2" Name="menuTree" Width="240" ItemsSource="{Binding MenuList}" BorderThickness="0" Background="#fff" HorizontalAlignment="Center" VerticalAlignment="Center"><TreeView.ItemTemplate><HierarchicalDataTemplate ItemsSource="{Binding Path=MenuChild}"><StackPanel><CheckBox Content="{Binding Path=menu.Header}" Margin="0,3"  x:Name="ckName" IsChecked="{Binding Path=IsSelect,Mode=TwoWay}"   Tag="{Binding Path=menu.HeaderCode}"  Checked="CkName_Checked" Unchecked="CkName_Unchecked"></CheckBox></StackPanel></HierarchicalDataTemplate></TreeView.ItemTemplate><TreeView.ItemContainerStyle><Style TargetType="{x:Type TreeViewItem}"><Setter Property="IsExpanded" Value="True"/><Setter Property="IsEnabled" Value="True"/></Style></TreeView.ItemContainerStyle></TreeView>

 /// <summary>/// 选中/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void CkName_Checked(object sender, RoutedEventArgs e){CheckBox ck = sender as CheckBox;var list = viewModel.MenuList.ToList();for (int i = 0; i < list.Count(); i++){var item = list[i];if (ck.Tag.ToString() == item.menu.HeaderCode){item.IsSelect = true;item.MenuChild = setBol(item.MenuChild, true, ck.Tag.ToString(), true);}else{item.MenuChild = setBol(item.MenuChild, true, ck.Tag.ToString());}} gg(ck.Tag.ToString(), list);}/// <summary>/// 修改是否选中/// </summary>/// <param name="list"></param>/// <param name="bol"></param>/// <returns></returns>public List<MenuParent> setBol(List<MenuParent> list, bool bol, string str, bool dbol = false){var d = list.ToList();for (int i = 0; i < d.Count(); i++){if (str == d[i].menu.HeaderCode || dbol){d[i].IsSelect = bol;if (d[i].MenuChild != null && d[i].MenuChild.Count > 0){d[i].MenuChild = setBol(d[i].MenuChild, bol, str, true);}}}return d;}/// <summary>/// 不选中/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void CkName_Unchecked(object sender, RoutedEventArgs e){CheckBox ck = sender as CheckBox;var list = viewModel.MenuList.ToList();for (int i = 0; i < list.Count(); i++){var item = list[i];if (ck.Tag.ToString() == item.menu.HeaderCode){item.IsSelect = false;item.MenuChild = setBol(item.MenuChild, false, ck.Tag.ToString(), true);}else{item.MenuChild = setBol(item.MenuChild, false, ck.Tag.ToString());}} gg(ck.Tag.ToString(),list);}/// <summary>///  /// </summary>/// <param name="cc"></param>/// <param name="list"></param> private void gg(string cc, List<MenuParent> list){List<MenuParent> xin = new List<MenuParent>();var r = viewModel.bphList(list.ToList()).Select(x => new MenuParent(x.IsSelect, x.menu)).OrderByDescending(x => x.menu.Remark).ToList();var one = r.FirstOrDefault(x=>x.menu.HeaderCode == cc);if (string.IsNullOrEmpty(one.menu.HeaderParent)){viewModel.MenuList = new System.Collections.ObjectModel.ObservableCollection<MenuParent>(viewModel.BuildTree(r.OrderBy(x => x.menu.Remark).ToList()));return;}xin123 = new List<MenuParent>();gg2(one.menu.Header,r);for (int i = 0; i < r.Count(); i++){var d = r[i];if (xin123.Any(x => x.menu.Header == d.menu.Header)){d.IsSelect = xin123.FirstOrDefault(x=>x.menu.Header==d.menu.Header).IsSelect;}}viewModel.MenuList = new System.Collections.ObjectModel.ObservableCollection<MenuParent>(viewModel.BuildTree(r.OrderBy(x=>x.menu.Remark).ToList()));}List<MenuParent> xin123 = new List<MenuParent>();private void gg2(string cc, List<MenuParent> list,string s=""){var r = list.ToList();var one = r.FirstOrDefault(x => x.menu.Header == cc);if(!string.IsNullOrEmpty(s) && one.menu.Header != s){if (r.Any(x => x.menu.HeaderParent == one.menu.Header && x.IsSelect)){one.IsSelect = true;}else{one.IsSelect = false;}xin123.Add(one);for (int i = 0; i < r.Count(); i++){var d = r[i];if (xin123.Any(x => x.menu.Header == d.menu.Header)){d.IsSelect = xin123.FirstOrDefault(x => x.menu.Header == d.menu.Header).IsSelect;}}}if (!string.IsNullOrEmpty(one.menu.HeaderParent)){gg2(one.menu.HeaderParent,list, cc);} }

public class t_menu
{/// <summary>/// /// </summary>public t_menu(){}private System.Int32 _id;/// <summary>/// /// </summary>public System.Int32 id { get { return this._id; } set { this._id = value; } }private System.String _HeaderCode;/// <summary>/// /// </summary>public System.String HeaderCode { get { return this._HeaderCode; } set { this._HeaderCode = value; } }private System.String _Header;/// <summary>/// /// </summary>public System.String Header { get { return this._Header; } set { this._Header = value; } }private System.String _HeaderParent;/// <summary>/// /// </summary>public System.String HeaderParent { get { return this._HeaderParent; } set { this._HeaderParent = value; } }private System.String _Remark;/// <summary>/// /// </summary>public System.String Remark { get { return this._Remark; } set { this._Remark = value; } }private System.SByte? _ToRole;/// <summary>/// /// </summary>public System.SByte? ToRole { get { return this._ToRole; } set { this._ToRole = value; } }private System.SByte? _status;/// <summary>/// /// </summary>public System.SByte? status { get { return this._status; } set { this._status = value; } }
}public class MenuParent{public t_menu menu { get; set; }/// <summary>/// 是否选中/// </summary>public bool IsSelect { get; set; }/// <summary>/// 子菜单列表/// </summary>public List<MenuParent> MenuChild { get; set; }public MenuParent(t_menu menu){this.menu = menu;this.IsSelect = false;this.MenuChild = new List<MenuParent>();}public MenuParent(bool IsSelect,t_menu menu){this.menu = menu;this.IsSelect = IsSelect;this.MenuChild = new List<MenuParent>();}}

// viewModel
// 初始化时 
List<MenuParent> menuParents = new List<MenuParent>();
MenuList = new ObservableCollection<MenuParent>();
MenuList = new ObservableCollection<MenuParent>(BuildTree(menuParents));private ObservableCollection<MenuParent> _menuList = new ObservableCollection<MenuParent>();/// <summary>/// 菜单列表/// </summary>public ObservableCollection<MenuParent> MenuList{get{return _menuList;}set{_menuList = value;OnPropertyChanged(() => MenuList);}}/// <summary>/// 转为tree结构/// </summary>/// <param name="flatList"></param>/// <returns></returns>public List<MenuParent> BuildTree(List<MenuParent> menuItems){// 创建一个字典来存储所有菜单项，以便快速查找  var menuDict = new Dictionary<string, MenuParent>();// 遍历菜单项，将它们添加到字典中  foreach (var item in menuItems){menuDict[item.menu.Header] = item;}// 创建一个列表来存储根菜单项（HeaderParent 为空或未设置的）  var rootMenuItems = new List<MenuParent>();// 再次遍历菜单项，构建树形结构  foreach (var item in menuItems){// 检查当前项是否有 HeaderParent  if (string.IsNullOrEmpty(item.menu.HeaderParent) || !menuDict.ContainsKey(item.menu.HeaderParent)){// 如果没有 HeaderParent 或找不到父节点，则它是根节点  rootMenuItems.Add(item);}else{// 找到父节点，并将当前项添加到其父节点的 Children 列表中  MenuParent parent = menuDict[item.menu.HeaderParent]; parent.MenuChild.Add(item);}}// 返回根菜单项列表  return rootMenuItems;}/// <summary>/// 获取list/// </summary>/// <returns></returns>public List<MenuParent> bphList(List<MenuParent> menuParents){List<MenuParent> menuParents1 = new List<MenuParent>();if(menuParents != null && menuParents.Count>0){foreach (var item in menuParents){var temp = item;if(temp != null && temp.MenuChild!=null && temp.MenuChild.Count>0){var d = bphList(temp.MenuChild);menuParents1.AddRange(d);} menuParents1.Add(item); }}return menuParents1;}