关闭窗口时 将数据设置为null

Control/Windows/ConfigWindow.xaml.cs

@@ -95,6 +95,7 @@ namespace GeekDesk.Control.Windows
         {
             if (e.Key == Key.Escape)
             {
+                this.DataContext = null;
                 this.Close();
             }
         }

Control/Windows/ToDoInfoWindow.xaml.cs

@@ -247,6 +247,7 @@ namespace GeekDesk.Control.Windows
         {
             if (e.Key == Key.Escape)
             {
+                this.DataContext = null;
                 this.Close();
             }
         }

Control/Windows/ToDoWindow.xaml.cs

@@ -102,6 +102,7 @@ namespace GeekDesk.Control.Windows
         {
             if (e.Key == Key.Escape)
             {
+                this.DataContext = null;
                 this.Close();
             }
         }

Control/Windows/UpdateWindow.xaml.cs

@@ -111,6 +111,7 @@ namespace GeekDesk.Control.Windows
         {
             if (e.Key == Key.Escape)
             {
+                this.DataContext = null;
                 this.Close();
             }
         }