摘要：给与HierarchicalDataTemplate数据模板和treeview在MVVM模式下实现行政区划树，
撑持勾选。
一、代码
1、Model
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace WpfHierarchicalTemplate { public class District { public int ID { get; set; } public string Xzqhdm { get; set; }//行政区划代码 public string Xzqhmc { get; set; }//行政区划名称 public int Level { get; set; }//级别，0全国，，1省，2地市，3县，4，乡镇，5，村 public IList<District> Children { get; set; } public District Parent { get; set; } } }
2、ViewModel
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Collections.ObjectModel; namespace WpfHierarchicalTemplate { public class DistrictNodeViewModel : ModelCommon.NotifyObject { private bool? isSelected = false; public bool? IsSelected { get { return isSelected; } set { isSelected = value; RaisePropertyChanged("IsSelected"); } } private bool? isChecked = false; public bool? IsChecked { get { return isChecked; } set { if (value != isChecked) { isChecked = value; RaisePropertyChanged("IsChecked"); } if (this.Children.Count > 0&&this.Children[0].isChecked!=value) { foreach (var item in this.Children) { item.IsChecked = value; } } if (this.parent!=null&&this.Parent.Children.Count==this.Parent.Children.Count(item=>item.isChecked==value)) { this.Parent.IsChecked = value; return; } } } private bool? isExpand = false; public bool? IsExpand { get { return isExpand; } set { isExpand = value; RaisePropertyChanged("IsExpand"); } } private ObservableCollection<DistrictNodeViewModel> children = new ObservableCollection<DistrictNodeViewModel>(); public ObservableCollection<DistrictNodeViewModel> Children { get { return children; } set { children = value; RaisePropertyChanged("Children"); } } private DistrictNodeViewModel parent; public DistrictNodeViewModel Parent { get { return parent; } set { parent = value; RaisePropertyChanged("Parent"); } } private District district; public District District { get { return district; } set { district = value; RaisePropertyChanged("District"); } } } }
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Collections.ObjectModel; namespace WpfHierarchicalTemplate { public class DistrictMainViewModel : ModelCommon.NotifyObject { private ObservableCollection<DistrictNodeViewModel> vmNodes; public ObservableCollection<DistrictNodeViewModel> VmNodes { get { return vmNodes; } set { vmNodes = value; RaisePropertyChanged("VmNodes"); } } public DistrictMainViewModel() { this.VmNodes = new ObservableCollection<DistrictNodeViewModel> { LoadData() }; } public DistrictNodeViewModel LoadData() { ObservableCollection<District> rootNodes =new ObservableCollection<District>(); District d00 = new District() { Xzqhmc = "全国", Parent = null }; District d0 = new District() { Xzqhmc="河南", Parent=d00 }; District d1 = new District() { Xzqhmc = "北京", Parent = d00 }; District d2 = new District() { Xzqhmc = "山东", Parent = d00 }; District d11 = new District() { Xzqhmc = "海淀区", Parent = d1 }; District d12 = new District() { Xzqhmc = "石景山区", Parent = d1 }; District d13 = new District() { Xzqhmc = "向阳区", Parent = d1 }; District d01 = new District() { Xzqhmc = "商丘", Parent = d0 }; District d02 = new District() { Xzqhmc = "郑州", Parent = d0 }; District d03 = new District() { Xzqhmc = "周口", Parent = d0 }; d1.Children = new List<District> { d11, d12, d13 }; d0.Children = new List<District> { d01, d02, d03 }; d00.Children = new List<District>{d1,d2,d0}; rootNodes.Add(d00); DistrictNodeViewModel dnv = new DistrictNodeViewModel(); dnv.District = rootNodes[0]; SetDNV(dnv, rootNodes[0]); return dnv; } private void SetDNV(DistrictNodeViewModel vm,District root) { if (root==null||root.Children==null||root.Children.Count==0) { return; } foreach (var item in root.Children) { DistrictNodeViewModel vmNew = new DistrictNodeViewModel(); vmNew.District = item; vmNew.Parent = vm; vm.Children.Add(vmNew); SetDNV(vmNew, item); } } } }
3、主窗口
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; namespace WpfHierarchicalTemplate { /// <summary> /// MainWindow.xaml 的交互逻辑 /// </summary> public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); this.DataContext = new DistrictMainViewModel(); } } }
4、前台xaml