Control.OnValidating(CancelEventArgs) Control.OnValidating(CancelEventArgs) Control.OnValidating(CancelEventArgs) Control.OnValidating(CancelEventArgs) Method

定義

引發 Validating 事件。Raises the Validating event.

protected:
 virtual void OnValidating(System::ComponentModel::CancelEventArgs ^ e);
protected virtual void OnValidating (System.ComponentModel.CancelEventArgs e);
abstract member OnValidating : System.ComponentModel.CancelEventArgs -> unit
override this.OnValidating : System.ComponentModel.CancelEventArgs -> unit
Protected Overridable Sub OnValidating (e As CancelEventArgs)

參數

e
CancelEventArgs CancelEventArgs CancelEventArgs CancelEventArgs

CancelEventArgs,其中包含事件資料。A CancelEventArgs that contains the event data.

備註

引發事件會透過委派叫用此事件處理常式。Raising an event invokes the event handler through a delegate. 如需詳細資訊,請參閱 < 處理和引發事件For more information, see Handling and Raising Events.

OnValidating方法也可讓衍生的類別,而不需要附加委派處理事件。The OnValidating method also enables derived classes to handle the event without attaching a delegate. 這是在衍生類別中處理事件的慣用技巧。This is the preferred technique for handling the event in a derived class.

給繼承者的注意事項

當在衍生類別中覆寫 OnValidating(CancelEventArgs) 時,請確定呼叫基底類別的 OnValidating(CancelEventArgs) 方法,使已註冊的委派能接收到事件。When overriding OnValidating(CancelEventArgs) in a derived class, be sure to call the base class's OnValidating(CancelEventArgs) method so that registered delegates receive the event.

適用於

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