ToolStripDropDown.Closed ToolStripDropDown.Closed ToolStripDropDown.Closed ToolStripDropDown.Closed Event

定义

发生时ToolStripDropDown已关闭。Occurs when the ToolStripDropDown is closed.

public:
 event System::Windows::Forms::ToolStripDropDownClosedEventHandler ^ Closed;
public event System.Windows.Forms.ToolStripDropDownClosedEventHandler Closed;
member this.Closed : System.Windows.Forms.ToolStripDropDownClosedEventHandler 
Public Custom Event Closed As ToolStripDropDownClosedEventHandler 

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Closed事件。In the example, an event handler reports on the occurrence of the Closed 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,请将其粘贴到包含类型的实例的项目ToolStripDropDown名为ToolStripDropDown1To run the example code, paste it into a project that contains an instance of type ToolStripDropDown named ToolStripDropDown1. 然后,确保事件处理程序相关联Closed事件。Then ensure that the event handler is associated with the Closed event.

private void ToolStripDropDown1_Closed(Object sender, ToolStripDropDownClosedEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "CloseReason", e.CloseReason );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "Closed Event" );
}
Private Sub ToolStripDropDown1_Closed(sender as Object, e as ToolStripDropDownClosedEventArgs) _ 
     Handles ToolStripDropDown1.Closed

    Dim messageBoxVB as New System.Text.StringBuilder()
    messageBoxVB.AppendFormat("{0} = {1}", "CloseReason", e.CloseReason)
    messageBoxVB.AppendLine()
    MessageBox.Show(messageBoxVB.ToString(),"Closed Event")

End Sub

注解

创建 ToolStripDropDown 委托时,需要标识将处理该事件的方法。When you create a ToolStripDropDown delegate, you identify the method that will handle the event. 若要将事件与事件处理程序关联,请将该委托的一个实例添加到事件中。To associate the event with your event handler, add an instance of the delegate to the event. 除非移除了该委托,否则每当发生该事件时就会调用事件处理程序。The event handler is called whenever the event occurs, unless you remove the delegate. 有关事件处理程序委托的详细信息,请参阅处理和引发事件For more information about event-handler delegates, see Handling and Raising Events.

适用于