c# - 不透明度未应用于 WPF 弹出控件

Question

Popup popUpControl = new Popup();

popUpControl.PlacementTarget = this; 
popUpControl.StaysOpen = true;
popUpControl.Child = new MyUserControl(); /// my user control 
popUpControl.Opacity = 0.5; // this code has no effect in the appearance of the popup
popUpControl.IsOpen = true;

怎么做？

Answer 1

您应该启用弹出窗口以具有透明度。添加以下代码行。

popUpControl.AllowsTransparency=true;