添加一个新类DataGridHelper,用于更新datagrid

ViewModel/MainWindowViewModel.cs

@@ -170,7 +170,7 @@ namespace formula_manage.ViewModel
         {
             DispatcherTimer timer = new DispatcherTimer//初始化循环，每0.5秒调用一次Tick_Event
             {
-                Interval = TimeSpan.FromSeconds(0.1)
+                Interval = TimeSpan.FromSeconds(0.5)
             };
             timer.Tick += Tick_Event;
             timer.Start();