c# - 将窗口设置为在MVVM中隐藏后捕获屏幕

Question

将窗口变量设置为隐藏并触发onPropertyChanged()后，我试图捕获屏幕。为什么还要录制自己的节目？

_VisibilityWindow = false;
OnPropertyChanged("VisibilityWindow");


Screenshot.captureAll();

_VisibilityWindow = true;
OnPropertyChanged("VisibilityWindow");

Answer 1

属性更改后，UI没有机会进行更新。
您可以等到应用程序使用Dispatcher完成渲染为止:

_VisibilityWindow = false;
OnPropertyChanged("VisibilityWindow");

System.Windows.Application.Current?.Dispatcher?.Invoke(() =>
  {
    Screenshot.captureAll();

    _VisibilityWindow = true;
    OnPropertyChanged("VisibilityWindow");
  }, DispatcherPriority.ApplicationIdle);