JSON import added

ViewModels/MainWindowViewModel.cs

@@ -45,15 +45,29 @@ public partial class MainWindowViewModel : ViewModelBase
     }
 
     [RelayCommand]
-    private void ImportPoint(Window w)
+    private async Task ImportPoint(Window w)
     {
-        
+        var files = await w.StorageProvider.OpenFilePickerAsync(new FilePickerOpenOptions
+        {
+            AllowMultiple = true,
+            SuggestedStartLocation = 
+                await w.StorageProvider.TryGetFolderFromPathAsync(
+                    Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments))
+        });
+        foreach (var file in files)
+        {
+            var url = file.Path.AbsolutePath;
+            var decoded = HttpUtility.HtmlDecode(url);
+            var point = DataSerialization.LoadPoint(decoded);
+            point?.SetPropertyParents();
+            Points.Add(new PointViewModel(point ?? new Point()));
+        }
     }
 
     [RelayCommand]
     private async Task ExportPoint(Window w)
     {
-        var folder = await w.StorageProvider.OpenFolderPickerAsync(new FolderPickerOpenOptions()
+        var folder = await w.StorageProvider.OpenFolderPickerAsync(new FolderPickerOpenOptions
         {
             AllowMultiple = false,
             SuggestedStartLocation =
@@ -64,9 +78,10 @@ public partial class MainWindowViewModel : ViewModelBase
         {
             DataSerialization.SavePoint(point.GetPoint(), Path.Combine(HttpUtility.HtmlDecode(folder[0].Path.AbsolutePath), point.Name + ".json") );
         }
+        
     }
     
-    // Visual properties
+    // Visual and other properties
     
     [ObservableProperty]
     private bool _isLineVisible;