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超过 WPF On startUp 的 WPF 启动效果导致多个窗口实例
原标题:Overriding WPF OnStartUp results in multiple window instances
  • 时间:2012-05-23 12:29:57
  •  标签:
  • wpf
  • mvvm

在一个简单的 MVVM 方法中,我将主窗口与一个视图模式连接起来,在 App.Sxaml 中压倒了On startup。

  public partial class App : Application
  {

    protected override void OnStartup(StartupEventArgs e)
    {
      base.OnStartup(e);

      MainWindow window = new MainWindow();
      var viewModel = new MainWindowViewModel();
      window.DataContext = viewModel;
      window.Show();
    }

  }

这导致在我运行 WPF 应用程序时出现两次主窗口。 它应该只产生一次, 因为我压倒了启动程序?

窗口之一显示正确的 DataContext (ViewModel), 而另一个则不是 。

最佳回答

在App.xaml中:

<Application x:Class="WpfApplication1.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             StartupUri="MainWindow.xaml">

删除 StartupUri。 这将停止第二个窗口装入 。

问题回答

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