Control.RegionChanged 事件

定义

Region 属性的值更改时发生。Occurs when the value of the Region property changes.

public:
 event EventHandler ^ RegionChanged;
public event EventHandler RegionChanged;
member this.RegionChanged : EventHandler 
Public Custom Event RegionChanged As EventHandler 

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 RegionChanged 事件的发生。In the example, an event handler reports on the occurrence of the RegionChanged 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 RegionChanged 事件关联。Then name the instance Control1 and ensure that the event handler is associated with the RegionChanged event.

private void Control1_RegionChanged(Object sender, EventArgs e) {

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

}
Private Sub Control1_RegionChanged(sender as Object, e as EventArgs) _ 
     Handles Control1.RegionChanged

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

End Sub

注解

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