ToolStripItem.VisibleChanged ToolStripItem.VisibleChanged ToolStripItem.VisibleChanged ToolStripItem.VisibleChanged Event


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

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


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VisibleChanged事件的发生。In the example, an event handler reports on the occurrence of the VisibleChanged 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MessageBox.ShowConsole.WriteLine消息替换为多行或将TextBox其追加到多行。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,该项目包含从ToolStripItem继承的类型的实例,如ToolStripMenuItem ToolStripButton或。To run the example code, paste it into a project that contains an instance of a type that inherits from ToolStripItem, such as a ToolStripButton or ToolStripMenuItem. 然后命名该实例ToolStripItem1 ,并确保事件处理程序VisibleChanged与事件相关联。Then name the instance ToolStripItem1 and ensure that the event handler is associated with the VisibleChanged event.

private void ToolStripItem1_VisibleChanged(Object sender, EventArgs e) {

   MessageBox.Show("You are in the ToolStripItem.VisibleChanged event.");

Private Sub ToolStripItem1_VisibleChanged(sender as Object, e as EventArgs) _ 
     Handles ToolStripItem1.VisibleChanged

   MessageBox.Show("You are in the ToolStripItem.VisibleChanged event.")

End Sub


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.


更改的Enabled ToolStrip属性不会引发VisibleChanged事件。Changing the Enabled property of a ToolStrip does not raise the VisibleChanged event. 用特定属性设置引发此事件。Raise this event with specific property settings.