Setting directory issue

MaterialDesignExtensions/Controllers/FileSystemController.cs

@@ -6,7 +6,7 @@
 using System.Text;
 using System.Text.RegularExpressions;
 using System.Threading.Tasks;
-
+using System.Windows;
 using MaterialDesignThemes.Wpf;
 
 using MaterialDesignExtensions.Model;
@@ -777,10 +777,18 @@ private bool AreObjectsEqual(object o1, object o2)
 
         private void OnPropertyChanged(string propertyName)
         {
-            if (PropertyChanged != null && !string.IsNullOrWhiteSpace(propertyName))
-            {
-                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
-            }
+            if (!string.IsNullOrWhiteSpace(propertyName))
+                if (PropertyChanged != null)
+                {
+                    PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
+                }
+                else
+                {
+                    Application.Current.Dispatcher.InvokeAsync(() =>
+                    {
+                        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+                    });
+                }
         }
     }
 }

MaterialDesignExtensions/Controls/BaseFileControl.cs

@@ -29,6 +29,11 @@ namespace MaterialDesignExtensions.Controls
     /// </summary>
     public abstract class BaseFileControl : FileSystemControl
     {
+        /// <summary>
+        /// An event-handler for the FileSelected event.
+        /// </summary>
+        public delegate void FileSelectedRoutedEventHandler(object sender, FileSelectedEventArgs fileSelectedEventArgs);
+
         /// <summary>
         /// The name of the combo box inside the template.
         /// </summary>
@@ -38,22 +43,15 @@ public abstract class BaseFileControl : FileSystemControl
         /// An event raised by selecting a file.
         /// </summary>
         public static readonly RoutedEvent FileSelectedEvent = EventManager.RegisterRoutedEvent(
-            nameof(FileSelected), RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(BaseFileControl));
+            nameof(FileSelected), RoutingStrategy.Bubble, typeof(FileSelectedRoutedEventHandler), typeof(BaseFileControl));
 
         /// <summary>
         /// An event raised by selecting a file.
         /// </summary>
-        public event RoutedEventHandler FileSelected
+        public event FileSelectedRoutedEventHandler FileSelected
         {
-            add
-            {
-                AddHandler(FileSelectedEvent, value);
-            }
-
-            remove
-            {
-                RemoveHandler(FileSelectedEvent, value);
-            }
+            add => AddHandler(FileSelectedEvent, value);
+            remove => RemoveHandler(FileSelectedEvent, value);
         }
 
         /// <summary>

MaterialDesignExtensions/Controls/FileSystemControl.cs

@@ -300,7 +300,6 @@ public FileSystemControl()
             : base()
         {
             m_controller = new FileSystemController();
-            m_controller.SelectDirectory(CurrentDirectory);
 
             CommandBindings.Add(new CommandBinding(FileSystemControlCommands.OpenSpecialDirectoriesDrawerCommand, OpenSpecialDirectoriesDrawerCommandHandler));
             CommandBindings.Add(new CommandBinding(FileSystemControlCommands.SelectDirectoryItemCommand, SelectDirectoryItemCommandHandler));
@@ -326,6 +325,7 @@ public override void OnApplyTemplate()
         {
             base.OnApplyTemplate();
 
+            m_controller.SelectDirectory(CurrentDirectory);
             m_pathPartsScrollViewer = Template.FindName(PathPartsScrollViewerName, this) as ScrollViewer;
 
             m_pathPartsItemsControl = Template.FindName(PathPartsItemsControlName, this) as ItemsControl;