ISelectionService.SelectionChanging 事件
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
在将要更改当前选择时发生。
public:
event EventHandler ^ SelectionChanging;event EventHandler SelectionChanging;member this.SelectionChanging : EventHandler Event SelectionChanging As EventHandler 事件类型
示例
以下示例演示如何使用 SelectionChanging 事件。
// Add SelectionChanging event handler to event
m_selectionService->SelectionChanging += gcnew EventHandler( this, &ComponentClass::OnSelectionChanging );
// Add SelectionChanging event handler to event
m_selectionService.SelectionChanging += new EventHandler(OnSelectionChanging);
' Add SelectionChanging event handler to event
AddHandler m_selectionService.SelectionChanging, AddressOf OnSelectionChanging
/* This is the OnSelectionChanging handler method. This method calls
OnUserChange to display a message that indicates the name of the
handler that made the call and the type of the event argument. */
void OnSelectionChanging( Object^ /*sender*/, EventArgs^ args )
{
OnUserChange( "OnSelectionChanging", args->ToString() );
}
/* This is the OnSelectionChanging handler method. This method calls
OnUserChange to display a message that indicates the name of the
handler that made the call and the type of the event argument. */
private void OnSelectionChanging(object sender, EventArgs args)
{
OnUserChange("OnSelectionChanging", args.ToString());
}
' This is the OnSelectionChanging handler method. This method calls
' OnUserChange to display a message that indicates the name of the
' handler that made the call and the type of the event argument.
Private Sub OnSelectionChanging(ByVal sender As Object, ByVal args As EventArgs)
OnUserChange("OnSelectionChanging", args.ToString())
End Sub
注解
在处理此事件时尽量减少处理，因为在此事件处理程序中发生的处理可能会显著影响表单设计器的整体性能。
