Element.HandlerChanging 事件

定义

每当元素的处理程序开始更改时引发。

public:
 virtual event EventHandler<Microsoft::Maui::Controls::HandlerChangingEventArgs ^> ^ HandlerChanging;
public event EventHandler<Microsoft.Maui.Controls.HandlerChangingEventArgs> HandlerChanging;
member this.HandlerChanging : EventHandler<Microsoft.Maui.Controls.HandlerChangingEventArgs> 
Public Event HandlerChanging As EventHandler(Of HandlerChangingEventArgs) 

事件类型

适用于