How to bind selected items in wpf treeview

Author: susmitha-sundar

SfTreeViewMVVMSelection/App.ico

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+<Application x:Class="TreeViewMVVMselectionDemo.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+        <ResourceDictionary>
+           
+        </ResourceDictionary>
+    </Application.Resources>
+</Application>

SfTreeViewMVVMSelection/App.xaml

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+#region Copyright Syncfusion Inc. 2001 - 2011
+// Copyright Syncfusion Inc. 2001 - 2011. All rights reserved.
+// Use of this code is subject to the terms of our license.
+// A copy of the current license can be obtained at any time by e-mailing
+// licensing@syncfusion.com. Any infringement will be prosecuted under
+// applicable laws. 
+#endregion
+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Windows;
+using Syncfusion.Licensing;
+
+namespace CheckedTreeViewDemo
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+        public App()
+        {
+            SyncfusionLicenseProvider.RegisterLicense(DemoCommon.FindLicenseKey());
+        }
+    }
+
+}

SfTreeViewMVVMSelection/App.xaml.cs

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+<Window 
+    x:Class="TreeViewMVVMselectionDemo.MainWindow"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="clr-namespace:TreeViewMVVMselectionDemo"
+    xmlns:syncfusion="http://schemas.syncfusion.com/wpf"
+    Title="TreeView MVVM selection"
+    Width="450"
+    Height="600" 
+    Icon="App.ico"
+    WindowStartupLocation="CenterScreen">
+
+    <Window.DataContext>
+        <local:ViewModel/>
+    </Window.DataContext>
+
+    <Grid>
+        <syncfusion:SfTreeView 
+                    x:Name="treeView"
+                    Margin="10"
+                    BorderThickness="1"
+                    AutoExpandMode="AllNodes"
+                    BorderBrush="LightGray"
+                    AllowDragging="True"
+                    SelectionMode="Multiple"
+                    SelectedItems="{Binding SelectedNodes,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"
+                    CheckBoxMode ="Recursive"
+                    ChildPropertyName="Models"
+                    ExpandActionTrigger="Node"
+                    ItemTemplateDataContextType="Node"
+                    FocusVisualStyle="{x:Null}"
+                    IsAnimationEnabled="True"                     
+                    ItemsSource="{Binding Items}" >
+
+        <syncfusion:SfTreeView.ItemTemplate>
+                <DataTemplate>
+                    <Grid> 
+                        <TextBlock FontSize="12" VerticalAlignment="Center" Text="{Binding Content.State}" />
+                    </Grid>
+                </DataTemplate>
+            </syncfusion:SfTreeView.ItemTemplate>
+        </syncfusion:SfTreeView>
+        
+        
+    </Grid>
+</Window>

SfTreeViewMVVMSelection/MainWindow.xaml

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+using System.Windows;
+using Syncfusion.Windows.Shared;
+
+namespace TreeViewMVVMselectionDemo
+{
+    /// <summary>
+    /// Interaction logic for Window1.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        #region Constructor
+
+        public MainWindow()
+        {
+            InitializeComponent();
+        }
+
+        #endregion
+    }
+}

SfTreeViewMVVMSelection/MainWindow.xaml.cs

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+#region Copyright Syncfusion Inc. 2001 - 2011
+// Copyright Syncfusion Inc. 2001 - 2011. All rights reserved.
+// Use of this code is subject to the terms of our license.
+// A copy of the current license can be obtained at any time by e-mailing
+// licensing@syncfusion.com. Any infringement will be prosecuted under
+// applicable laws. 
+#endregion
+using System.Collections.ObjectModel;
+using System.Collections.Generic;
+using System.ComponentModel;
+using Syncfusion.Windows.Shared;
+using System.Windows.Media.Imaging;
+
+namespace TreeViewMVVMselectionDemo
+{
+    public class Model : NotificationObject
+    {
+        public Model()
+        {
+            Models = new ObservableCollection<Model>();
+        }
+
+        private ObservableCollection<Model> models;
+        public ObservableCollection<Model> Models
+        {
+            get
+            {
+                return models;
+            }
+
+            set
+            {
+                models = value;
+                this.RaisePropertyChanged("Models");
+            }
+        }
+
+        #region TreeViewItemAdv Properties
+
+        private string state;
+        /// <summary>
+        /// Gets or sets a value indicating the Header of the TreeViewItemAdv.
+        /// </summary>        
+        public string State
+        {
+            get
+            {
+                return state;
+            }
+
+            set
+            {
+                state = value;
+                this.RaisePropertyChanged("State");
+            }
+        }
+       
+
+        #endregion
+    }
+}

SfTreeViewMVVMSelection/Model/Model.cs

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+#region Copyright Syncfusion Inc. 2001 - 2011
+// Copyright Syncfusion Inc. 2001 - 2011. All rights reserved.
+// Use of this code is subject to the terms of our license.
+// A copy of the current license can be obtained at any time by e-mailing
+// licensing@syncfusion.com. Any infringement will be prosecuted under
+// applicable laws. 
+#endregion
+using System.Reflection;
+using System.Resources;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Windows;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("CheckedTreeViewDemo")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("Microsoft")]
+[assembly: AssemblyProduct("CheckedTreeViewDemo")]
+[assembly: AssemblyCopyright("Copyright © Microsoft 2011")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+//In order to begin building localizable applications, set 
+//<UICulture>CultureYouAreCodingWith</UICulture> in your .csproj file
+//inside a <PropertyGroup>.  For example, if you are using US english
+//in your source files, set the <UICulture> to en-US.  Then uncomment
+//the NeutralResourceLanguage attribute below.  Update the "en-US" in
+//the line below to match the UICulture setting in the project file.
+
+//[assembly: NeutralResourcesLanguage("en-US", UltimateResourceFallbackLocation.Satellite)]
+
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+    //(used if a resource is not found in the page, 
+    // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+    //(used if a resource is not found in the page, 
+    // app, or any theme specific resource dictionaries)
+)]
+
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]