Enable drop for DataGrid

Author: lukeblevins

Files UWP/GenericFileBrowser.xaml

@@ -12,7 +12,7 @@
     xmlns:local2="using:Files.Filesystem"
     xmlns:local3="using:Files.Interacts"
     Name="GenericItemView"
-    mc:Ignorable="d" IsRightTapEnabled="True" RightTapped="GenericItemView_RightTapped" PointerReleased="GenericItemView_PointerReleased">
+    mc:Ignorable="d"  IsRightTapEnabled="True" RightTapped="GenericItemView_RightTapped" PointerReleased="GenericItemView_PointerReleased">
     <Page.Resources>
         <Style x:Key="TextBoxStyleForPathBar" TargetType="TextBox">
             <Setter Property="Foreground" Value="{ThemeResource DefaultTextForegroundThemeBrush}"/>
@@ -266,7 +266,7 @@
 
 
 
-            <controls:DataGrid ContextRequested="AllView_ContextRequested" SelectionChanged="AllView_SelectionChanged" Margin="24,0,0,0" Grid.Row="3" CellEditEnded="AllView_CellEditEnded" FocusVisualPrimaryThickness="0" SelectionMode="Extended" IsDoubleTapEnabled="True" x:FieldModifier="public" x:Name="AllView" Drop="AllView_DropAsync"  AutoGenerateColumns="False" CanDrag="False" AllowDrop="True" DragOver="AllView_DragOver" IsRightTapEnabled="True" CanUserReorderColumns="False" IsReadOnly="True"  ItemsSource="{x:Bind local:App.ViewModel.FilesAndFolders}"  HorizontalAlignment="Left">
+            <controls:DataGrid AllowDrop="True" Drop="AllView_DropAsync" DragLeave="AllView_DragLeave" DragStarting="AllView_DragStarting" ContextRequested="AllView_ContextRequested" SelectionChanged="AllView_SelectionChanged" Margin="24,0,0,0" Grid.Row="3" CellEditEnded="AllView_CellEditEnded" FocusVisualPrimaryThickness="0" SelectionMode="Extended" IsDoubleTapEnabled="True" x:FieldModifier="public" x:Name="AllView" AutoGenerateColumns="False" CanDrag="True" DragOver="AllView_DragOver" IsRightTapEnabled="True" CanUserReorderColumns="False" IsReadOnly="True"  ItemsSource="{x:Bind local:App.ViewModel.FilesAndFolders}"  HorizontalAlignment="Left">
 
                 <controls:DataGrid.ColumnHeaderStyle>
                     <Style TargetType="controlsprimitives:DataGridColumnHeader">

Files UWP/GenericFileBrowser.xaml.cs

@@ -21,6 +21,8 @@
 using Windows.UI.Popups;
 using System.IO;
 using Windows.UI.Xaml.Controls.Primitives;
+using Windows.ApplicationModel.DataTransfer.DragDrop.Core;
+using System.Collections.Generic;
 
 namespace Files
 {
@@ -236,16 +238,17 @@ private async void AllView_DropAsync(object sender, DragEventArgs e)
         {
             if (e.DataView.Contains(StandardDataFormats.StorageItems))
             {
-                var items = await e.DataView.GetStorageItemsAsync();
-                if(items.Count() == 1)
-                {
-                    DataPackage data = new DataPackage();
-                    foreach(IStorageItem storageItem in items)
+                    foreach (IStorageItem item in await e.DataView.GetStorageItemsAsync())
                     {
-                        var itemPath = storageItem.Path;
-
-                    } 
-                }
+                        if (item.IsOfType(StorageItemTypes.Folder))
+                        {
+                            Interaction.CloneDirectoryAsync((item as StorageFolder).Path, App.ViewModel.Universal.path, (item as StorageFolder).DisplayName);
+                        }
+                        else
+                        {
+                            await (item as StorageFile).CopyAsync(await StorageFolder.GetFolderFromPathAsync(App.ViewModel.Universal.path));
+                        }
+                    }
             }
         }
 
@@ -477,6 +480,16 @@ private void AllView_ContextRequested(UIElement sender, ContextRequestedEventArg
         {
 
         }
+
+        private void AllView_DragStarting(UIElement sender, DragStartingEventArgs args)
+        {
+            args.DragUI.SetContentFromDataPackage();
+        }
+
+        private void AllView_DragLeave(object sender, DragEventArgs e)
+        {
+            
+        }
     }
 
     public class EmptyFolderTextState : INotifyPropertyChanged