Stylus.PreviewStylusButtonDown Stylus.PreviewStylusButtonDown Stylus.PreviewStylusButtonDown Attached Event

定義

使用者按下手寫筆上其中一個按鈕時發生。Occurs when the user presses one of the buttons on the stylus.

see AddPreviewStylusButtonDownHandler, and RemovePreviewStylusButtonDownHandler
see AddPreviewStylusButtonDownHandler, and RemovePreviewStylusButtonDownHandler
see AddPreviewStylusButtonDownHandler, and RemovePreviewStylusButtonDownHandler

範例

下列範例示範如何判斷引發PreviewStylusButtonDown事件的按鈕。The following example demonstrates how to determine which button raised the PreviewStylusButtonDown event. 這個範例假設有一個TextBox呼叫textBox1 , 而且該PreviewStylusButtonDown事件已連接到事件處理常式。This example assumes that there is a TextBox called textBox1 and that the PreviewStylusButtonDown event is connected to the event handlers.

void textbox1_PreviewStylusButtonDown(object sender, StylusButtonEventArgs e)
{
    textbox1.AppendText(e.StylusButton.Name + "\n");
}
Private Sub textbox1_PreviewStylusButtonDown(ByVal sender As Object, _
    ByVal e As StylusButtonEventArgs) Handles textbox1.PreviewStylusButtonDown

    textbox1.AppendText(e.StylusButton.Name & vbLf)

End Sub

備註

這是附加事件。This is an attached event. WPFWPF將附加事件實作為路由事件。implements attached events as routed events. 附加事件基本上是一種XAMLXAML語言概念, 用來參考在不會定義事件的物件上處理的事件。An attached event is, fundamentally, a XAMLXAML language concept used to reference events that are handled on objects that do not, themselves, define events. WPFWPF進一步擴充附加事件的功能, 讓它能夠跨越路由。further expands an attached event's capabilities, allowing it to traverse a route. 附加事件在程式碼中沒有直接處理語法;若要在程式碼中附加路由事件的處理常式, 請使用指定的 Add * 處理常式方法。Attached events do not have a direct handling syntax in code; to attach handlers for a routed event in code, use a designated Add*Handler method. 如需詳細資訊, 請參閱附加事件總覽For details, see Attached Events Overview.

路由事件資訊Routed Event Information

識別碼欄位Identifier field PreviewStylusButtonDownEvent
路由策略Routing strategy 建立Tunneling
Delegate - 委派Delegate StylusButtonEventHandler

適用於

另請參閱