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

定义

在控件的句柄处于销毁过程中时发生。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 
属性

示例

下面的代码示例演示如何将此成员。The following code example demonstrates the use of this member. 在示例中,事件处理程序报告的匹配项HandleDestroyed事件。In the example, an event handler reports on the occurrence of the HandleDestroyed event. 此报告可帮助您了解事件发生的并可以帮助您进行调试。This report helps you to learn when the event occurs and can assist you in debugging. 若要报告或频繁发生的事件上多个事件,请考虑更换MessageBox.ShowConsole.WriteLine或将消息附加到多行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.

若要运行此代码示例,请将其粘贴到包含继承的类型的实例的项目Control,如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. 然后该实例命名Control1,并确保事件处理程序相关联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

注解

期间HandleDestroyed事件,该控件仍是有效的 Windows 控件和Handle可以通过调用重新创建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.

有关处理事件的详细信息,请参阅处理和引发事件For more information about handling events, see Handling and Raising Events.

适用于

另请参阅