WPF-833954-Updating sample code for checked items using IsCheckedMemberPathProperty

Samples/CheckItem-By-Property/MainWindow.xaml

@@ -17,20 +17,14 @@
         </local:ViewModel>
     </Window.Resources>
     <Grid>
-        <syncfusion:CheckListBox ItemsSource="{Binding VirtualCollection}"
+        <syncfusion:CheckListBox IsCheckedMemberPath="Enabled"
+                                 ItemsSource="{Binding VirtualCollection}"
                                  GroupDescriptions="{Binding GroupDescriptions}"
                                  DataContext="{StaticResource viewModel}"
                                  DisplayMemberPath="Name" 
                                  Name="checkListBox"
                                  Margin="20">
 
-                        <!--Binding the IsChecked property from ViewModel-->
-                        <syncfusion:CheckListBox.Resources>
-                            <Style TargetType="syncfusion:CheckListBoxItem">
-                                <Setter Property="IsChecked" Value="{Binding Mode=TwoWay, Path=IsChecked}"/>
-                            </Style>
-                        </syncfusion:CheckListBox.Resources>
-
                         <!--Disable the Virtualization to update the checked item-->
                         <syncfusion:CheckListBox.ItemsPanel>
                             <ItemsPanelTemplate>

Samples/CheckItem-By-Property/Model/Model.cs

@@ -1,16 +1,32 @@
 using System;
 using System.Collections.Generic;
+using System.ComponentModel;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
 namespace CheckItem_By_Property
 {
     //Model.cs
-    public class GroupItem
+    public class GroupItem : INotifyPropertyChanged
     {
         public string Name { get; set; }
         public string GroupName { get; set; }
-        public bool IsChecked { get; set; }
-    }
+        private bool enabled;       
+        public bool Enabled
+        {
+            get { return enabled; }
+            set 
+            {
+               enabled = value;
+               OnPropertyChanged("Enabled");
+            }
+        }
+
+        public event PropertyChangedEventHandler PropertyChanged;
+        protected virtual void OnPropertyChanged(string propertyName)
+        {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+    }   
 }

Samples/CheckItem-By-Property/ViewModel/ViewModel.cs

@@ -39,7 +39,7 @@ public ViewModel()
             GroupDescriptions = new ObservableCollection<GroupDescription>();
 
             VirtualCollection = new ObservableCollection<GroupItem>();
-            for (int i = 0; i < 1000; i++)
+            for (int i = 0; i < 10; i++)
             {
                 for (int j = 0; j < 10; j++)
                 {
@@ -51,7 +51,7 @@ public ViewModel()
                     if (i % 2 == 0)
                     {
                         //Define a checked state for items
-                        myitem.IsChecked = true;
+                        myitem.Enabled = true;
                     }
                     VirtualCollection.Add(myitem);
                 }