public FullWindowPopup()
{
_contentControl = new ContentControl()
{
HorizontalContentAlignment = HorizontalAlignment.Stretch,
VerticalContentAlignment = VerticalAlignment.Stretch
};
_popup = new Popup()
{
Child = _contentControl
};
var binding = new Binding()
{
Source = this,
Path = new PropertyPath(nameof(IsOpen)),
Mode = BindingMode.TwoWay
};
_popup.SetBinding(Popup.IsOpenProperty, binding);
Action keepPopupSize = () =>
{
Window.Current.SizeChanged += delegate
{
ReSize();
};
ReSize();
};
var app = Bootstrapper.Current;
if (app != null && app.IsInConstructing)
{
// 应用程序的 App 类继承自 Bootstrapper，并且当前处于 App 类的构造函数中，将保持 Popup 大小的方法放至构造函数执行完成后再执行。
app._waitForConstructedActions.Add(() =>
{
keepPopupSize.Invoke();
return Task.FromResult<object>(null);
});
}
else
{
keepPopupSize.Invoke();
}
}