共用方式為


Element.HandlerChanging 事件

定義

每當項目的處理程序開始變更時引發。

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) 

事件類型

適用於