Merge pull request #3 from susmitha-sundar/master

Updated the WPF DragDrop sample for SeemlessDragDrop blog

Author: AmalRajUmapathySelvam

WPF/App.config

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
     <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6"/>
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.2"/>
     </startup>
 </configuration>

WPF/Behavior/DragAndDropBehavior.cs

@@ -0,0 +1,88 @@
+using Microsoft.Xaml.Behaviors;
+using Syncfusion.UI.Xaml.Grid;
+using Syncfusion.UI.Xaml.TreeGrid;
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DragandDropDemo
+{
+    public class DragAndDropBehavior:Behavior<MainWindow>
+    {
+        protected override void OnAttached()
+        {
+            base.OnAttached();
+            //Uncomment these events for Drag Drop customization
+            //AssociatedObject.firstGrid.RowDragDropController.DragStart += RowDragDropController_DragStart;
+            //AssociatedObject.firstGrid.RowDragDropController.DragOver += RowDragDropController_DragOver;
+            //AssociatedObject.firstGrid.RowDragDropController.Drop += RowDragDropController_Drop;
+            //AssociatedObject.firstGrid.RowDragDropController.Dropped += RowDragDropController_Dropped;
+        }
+
+        private void RowDragDropController_Dropped(object sender, GridRowDroppedEventArgs e)
+        {
+            ObservableCollection<object> draggingRecords = new ObservableCollection<object>();
+
+            draggingRecords = e.Data.GetData("Records") as ObservableCollection<object>;
+
+            var items = draggingRecords[0] as UserInfo;
+
+            var records = AssociatedObject.firstGrid.View.Records.ToList();
+
+            IList collection = AssociatedObject.firstGrid.ItemsSource as IList;
+
+            for (int i = 0; i < records.Count; i++)
+            {
+
+                var orderData = records[i].Data as UserInfo;
+                if (orderData.UserId == items.UserId)
+                {
+                    collection.Remove(items);
+                    collection.Insert(i, orderData);
+                }
+
+            }
+            AssociatedObject.firstGrid.ItemsSource = collection;
+        }
+
+        private void RowDragDropController_Drop(object sender, GridRowDropEventArgs e)
+        {
+            var record = e.DraggingRecords[0] as UserInfo;
+            var dropPosition = e.DropPosition.ToString();
+
+            if (dropPosition == "DropAbove")
+                e.Handled = true;
+
+            if (record != null && record.UserId == 1010)
+                e.Handled = true;
+        }
+
+
+        private void RowDragDropController_DragOver(object sender, GridRowDragOverEventArgs e)
+        {
+            e.ShowDragUI = false;   
+        }
+
+        private void RowDragDropController_DragStart(object sender, GridRowDragStartEventArgs e)
+        {
+            var record = e.DraggingRecords[0] as UserInfo;
+            if(record != null && record.UserId == 1005)
+            {
+                e.Handled = true;
+            }
+        }
+
+        protected override void OnDetaching()
+        {
+            AssociatedObject.firstGrid.RowDragDropController.DragStart -= RowDragDropController_DragStart;
+            AssociatedObject.firstGrid.RowDragDropController.DragOver -= RowDragDropController_DragOver;
+            AssociatedObject.firstGrid.RowDragDropController.Drop -= RowDragDropController_Drop;
+            AssociatedObject.firstGrid.RowDragDropController.Dropped -= RowDragDropController_Dropped;
+            base.OnDetaching();
+        }
+    }
+}