// TreeView 全选/反选/子级选中父级也选中 

CSDN 下载链接

 /// 
  /// 选中  /// 
  ///   ///   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);    }   /// 
  /// 修改是否选中  /// 
  ///   ///   ///   public List setBol(List 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;  }    /// 
  /// 不选中  /// 
  ///   ///   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);   }   /// 
  ///    /// 
  ///   ///    private void gg(string cc, List list)  {      List xin = new List();      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(viewModel.BuildTree(r.OrderBy(x => x.menu.Remark).ToList()));          return;      }       xin123 = new List();      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(viewModel.BuildTree(r.OrderBy(x=>x.menu.Remark).ToList()));  }    List xin123 = new List();  private void gg2(string cc, List 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 {     /// 
     ///      /// 
     public t_menu()     {     }      private System.Int32 _id;     /// 
     ///      /// 
     public System.Int32 id { get { return this._id; } set { this._id = value; } }      private System.String _HeaderCode;     /// 
     ///      /// 
     public System.String HeaderCode { get { return this._HeaderCode; } set { this._HeaderCode = value; } }      private System.String _Header;     /// 
     ///      /// 
     public System.String Header { get { return this._Header; } set { this._Header = value; } }      private System.String _HeaderParent;     /// 
     ///      /// 
     public System.String HeaderParent { get { return this._HeaderParent; } set { this._HeaderParent = value; } }      private System.String _Remark;     /// 
     ///      /// 
     public System.String Remark { get { return this._Remark; } set { this._Remark = value; } }      private System.SByte? _ToRole;     /// 
     ///      /// 
     public System.SByte? ToRole { get { return this._ToRole; } set { this._ToRole = value; } }      private System.SByte? _status;     /// 
     ///      /// 
     public System.SByte? status { get { return this._status; } set { this._status = value; } } }     public class MenuParent     {          public t_menu menu { get; set; }          /// 
         /// 是否选中         /// 
         public bool IsSelect { get; set; }          /// 
         /// 子菜单列表         /// 
         public List MenuChild { get; set; }          public MenuParent(t_menu menu)         {             this.menu = menu;             this.IsSelect = false;             this.MenuChild = new List();         }         public MenuParent(bool IsSelect,t_menu menu)         {             this.menu = menu;             this.IsSelect = IsSelect;             this.MenuChild = new List();         }     } 

// viewModel // 初始化时  List menuParents = new List(); MenuList = new ObservableCollection(); MenuList = new ObservableCollection(BuildTree(menuParents));    private ObservableCollection _menuList = new ObservableCollection();  /// 
  /// 菜单列表  /// 
  public ObservableCollection MenuList  {      get      {          return _menuList;      }      set      {          _menuList = value;          OnPropertyChanged(() => MenuList);      }  }  /// 
  /// 转为tree结构  /// 
  ///   ///   public List BuildTree(List 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();       // 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();       // 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;  }   /// 
  /// 获取list  /// 
  ///   public List bphList(List menuParents)  {      List menuParents1 = new List();       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;  }