Control.HandleDestroyed Control.HandleDestroyed Control.HandleDestroyed Control.HandleDestroyed Event

定義

發生於終結控制項的控制代碼時。Occurs when the control's handle is in the process of being destroyed.

public:
 event EventHandler ^ HandleDestroyed;
[System.ComponentModel.Browsable(false)]
public event EventHandler HandleDestroyed;
member this.HandleDestroyed : EventHandler 
Public Custom Event HandleDestroyed As EventHandler 
屬性

範例

下列程式碼範例示範如何使用這個成員。The following code example demonstrates the use of this member. 在範例中,事件處理常式會報告一次HandleDestroyed事件。In the example, an event handler reports on the occurrence of the HandleDestroyed event. 此報表可協助您了解事件發生的時機,並可協助您偵錯。This report helps you to learn when the event occurs and can assist you in debugging. 若要報告多個事件或事件經常發生,請考慮更換MessageBox.Show具有Console.WriteLine或將訊息附加到多行TextBoxTo report on multiple events or on events that occur frequently, consider replacing MessageBox.Show with Console.WriteLine or appending the message to a multiline TextBox.

若要執行範例程式碼,將它貼至專案,其中包含繼承自類型的執行個體Control,這類ButtonComboBoxTo run the example code, paste it into a project that contains an instance of a type that inherits from Control, such as a Button or ComboBox. 然後將其命名執行個體Control1,並確保與關聯的事件處理常式HandleDestroyed事件。Then name the instance Control1 and ensure that the event handler is associated with the HandleDestroyed event.

private void Control1_HandleDestroyed(Object sender, EventArgs e) {

   MessageBox.Show("You are in the Control.HandleDestroyed event.");

}
Private Sub Control1_HandleDestroyed(sender as Object, e as EventArgs) _ 
     Handles Control1.HandleDestroyed

   MessageBox.Show("You are in the Control.HandleDestroyed event.")

End Sub

備註

期間HandleDestroyed事件,控制項仍然是有效的 Windows 控制項和Handle可以藉由呼叫重新建立RecreateHandle方法。During the HandleDestroyed event, the control is still a valid Windows control and the Handle can be recreated by calling the RecreateHandle method.

如需有關如何處理事件的詳細資訊,請參閱 < 處理和引發事件For more information about handling events, see Handling and Raising Events.

適用於

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