Control.HandleDestroyed 事件

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使用此成员。The following code example demonstrates the use of this member. 在此示例中,事件处理程序报告 HandleDestroyed 事件的发生。In the example, an event handler reports on the occurrence of the HandleDestroyed event. 此报表可帮助你了解何时发生事件,并可帮助你进行调试。This report helps you to learn when the event occurs and can assist you in debugging. 若要报告多个事件或频繁发生的事件,请考虑将 MessageBox.Show 替换为 Console.WriteLine 或将消息附加到多行 TextBox中。To 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.

若要运行示例代码,请将其粘贴到一个项目中,该项目包含继承自 Control的类型的实例,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,将该实例命名为 Control1 并确保事件处理程序与 HandleDestroyed 事件关联。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

HandleDestroyed 事件期间,控件仍然是有效的 Windows 控件,可以通过调用 RecreateHandle 方法来重新创建 HandleDuring 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