Treeview-wpf-mvvm-hierarchicaldatatemplate

Summary: Use hierarchicaldatatemplate data template and TreeView to implement the administrative division tree in MVVM mode,

Support Tick.

One, the code

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;} Administrative Division Code Public        string XZQHMC {get; set;} Administrative division name Public        int level {get; set;} Level, 0 nationwide, 1 provinces, 2 cities, 3 counties, 4, townships, 5, village 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). 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<distric        Tnodeviewmodel> ();            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 =ne            W observablecollection<district> (); District d00 = new District () {XZQHMC = "National ", Parent = null};                              District D0 = new District () {xzqhmc= "Henan", parent=d00            };            District D1 = new District () {XZQHMC = "Beijing", Parent = d00};            District D2 = new District () {XZQHMC = "Shandong", Parent = d00};             District D11 = new District () {XZQHMC = "Haidian", Parent = D1};            District D12 = new District () {XZQHMC = "Shijingshan", Parent = D1            };                        District D13 = new District () {XZQHMC = "Chaoyang", Parent = D1};            District d01 = new District () {XZQHMC = "Shangqiu", Parent = D0            };   District d02 = new District ()         {XZQHMC = "Zhengzhou", Parent = D0};            District d03 = new District () {XZQHMC = "Zhoukou", 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 to 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. main Window

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 Interactive logic///    </summary> public    partial class Mainwindow:window    {        public MainWindow ()        {            InitializeComponent ();            This. DataContext = new Districtmainviewmodel ();}}    }

　　

4. Foreground XAML

<window x:class= "Wpfhierarchicaltemplate.mainwindow"        xmlns= "Http://schemas.microsoft.com/winfx/2006/xaml /presentation "        xmlns:x=" Http://schemas.microsoft.com/winfx/2006/xaml "        title=" MainWindow "height=" 350 " Width= "525" >    <Window.Resources>        
Second, the effect
 Treeview-wpf-mvvm-hierarchicaldatatemplate