Ensure Extended Item Properties Are Loaded Upon Initial Navigation

Author: lukeblevins

Files/Filesystem/ItemViewModel.cs

@@ -526,8 +526,22 @@ public static extern IntPtr FindFirstFileExFromApp(
 
         [DllImport("api-ms-win-core-file-l1-1-0.dll")]
         static extern bool FindClose(IntPtr hFindFile);
-
-        bool isLoadingItems = false;
+        private bool _isLoadingItems = false;
+        public bool isLoadingItems
+        {
+            get
+            {
+                return _isLoadingItems;
+            }
+            internal set
+            {
+                if(_isLoadingItems != value)
+                {
+                    _isLoadingItems = value;
+                    NotifyPropertyChanged("isLoadingItems");
+                }
+            }
+        }
 
         class PartialStorageItem
         {
@@ -564,7 +578,7 @@ public async void LoadExtendedItemProperties(ListedItem item)
                     }
                     catch (UnauthorizedAccessException)
                     {
-                        await App.consentDialog.ShowAsync();
+                        item.ItemPropertiesInitialized = true;
                         return;
                     }
                     catch (FileNotFoundException)
@@ -587,7 +601,7 @@ public async void LoadExtendedItemProperties(ListedItem item)
                     }
                     catch (UnauthorizedAccessException)
                     {
-                        await App.consentDialog.ShowAsync();
+                        item.ItemPropertiesInitialized = true;
                         return;
                     }
                     catch (FileNotFoundException)

Files/Interacts/Interaction.cs

@@ -241,6 +241,22 @@ public void AllView_RightTapped(object sender, RightTappedRoutedEventArgs e)
 
         }
 
+        public static T FindChild<T>(DependencyObject startNode) where T : DependencyObject
+        {
+            int count = VisualTreeHelper.GetChildrenCount(startNode);
+            for (int i = 0; i < count; i++)
+            {
+                DependencyObject current = VisualTreeHelper.GetChild(startNode, i);
+                if ((current.GetType()).Equals(typeof(T)) || (current.GetType().GetTypeInfo().IsSubclassOf(typeof(T))))
+                {
+                    T asType = (T)current;
+                    return asType;
+                }
+                FindChild<T>(current);
+            }
+            return null;
+        }
+
         public static void FindChildren<T>(List<T> results, DependencyObject startNode) where T : DependencyObject
         {
             int count = VisualTreeHelper.GetChildrenCount(startNode);

Files/UserControls/GenericFileBrowser.xaml

@@ -295,7 +295,7 @@
             x:Name="AllView"
             Grid.Row="3"
             Margin="12,12,0,0"
-            HorizontalAlignment="Stretch"
+            HorizontalAlignment="Left"
             x:FieldModifier="public"
             AllowDrop="True"
             AutoGenerateColumns="False"

Files/UserControls/GenericFileBrowser.xaml.cs

@@ -17,6 +17,8 @@
 using System.Linq;
 using Microsoft.Toolkit.Uwp.UI.Behaviors;
 using Windows.Foundation;
+using Windows.UI.Xaml.Media;
+using System.Collections.Generic;
 
 namespace Files
 {
@@ -78,7 +80,7 @@ public GenericFileBrowser()
             App.CurrentInstance.ViewModel.PropertyChanged += ViewModel_PropertyChanged;
         }
 
-        private void ViewModel_PropertyChanged(object sender, PropertyChangedEventArgs e)
+        private async void ViewModel_PropertyChanged(object sender, PropertyChangedEventArgs e)
         {
             if (e.PropertyName == "DirectorySortOption")
             {
@@ -103,6 +105,26 @@ private void ViewModel_PropertyChanged(object sender, PropertyChangedEventArgs e
                 // Swap arrows
                 SortedColumn = _sortedColumn;
             }
+            else if (e.PropertyName == "isLoadingItems")
+            {
+                if (!AssociatedViewModel.isLoadingItems && AssociatedViewModel.FilesAndFolders.Count > 0)
+                {
+                    var allRows = new List<DataGridRow>();
+
+                    Interacts.Interaction.FindChildren<DataGridRow>(allRows, AllView);
+                    foreach(DataGridRow row in allRows.Take(20))
+                    {
+                        if (!(row.DataContext as ListedItem).ItemPropertiesInitialized)
+                        {
+                            await Window.Current.CoreWindow.Dispatcher.RunIdleAsync((e) =>
+                            {
+                                App.CurrentInstance.ViewModel.LoadExtendedItemProperties(row.DataContext as ListedItem);
+                                (row.DataContext as ListedItem).ItemPropertiesInitialized = true;
+                            });
+                        }
+                    }
+                }
+            }
         }
 
         private void AllView_DragOver(object sender, DragEventArgs e)