ToolStripItem.OnDoubleClick(EventArgs) ToolStripItem.OnDoubleClick(EventArgs) ToolStripItem.OnDoubleClick(EventArgs) ToolStripItem.OnDoubleClick(EventArgs) Method

定义

引发 DoubleClick 事件。Raises the DoubleClick event.

protected:
 virtual void OnDoubleClick(EventArgs ^ e);
protected virtual void OnDoubleClick (EventArgs e);
abstract member OnDoubleClick : EventArgs -> unit
override this.OnDoubleClick : EventArgs -> unit
Protected Overridable Sub OnDoubleClick (e As EventArgs)

参数

e
EventArgs EventArgs EventArgs EventArgs

包含事件数据的 EventArgsAn EventArgs that contains the event data.

示例

下面的代码示例演示如何重写OnDoubleClick方法。The following code example demonstrates how to override the OnDoubleClick method. 此代码示例是为ToolStripItem类提供的更大示例的一部分。This code example is part of a larger example provided for the ToolStripItem class.

// The method defines the behavior of the DoubleClick 
// event. It shows a MessageBox with the item's text.
protected override void OnDoubleClick(EventArgs e)
{
    base.OnDoubleClick(e);

    string msg = String.Format("Item: {0}", this.Text);

    MessageBox.Show(msg);
}
' The method defines the behavior of the DoubleClick 
' event. It shows a MessageBox with the item's text.
Protected Overrides Sub OnDoubleClick(e As EventArgs)
   MyBase.OnDoubleClick(e)
   
   Dim msg As String = String.Format("Item: {0}", Me.Text)
   
   MessageBox.Show(msg)
 End Sub

注解

引发事件时,将通过委托调用事件处理程序。Raising an event invokes the event handler through a delegate. 有关详细信息, 请参阅处理和引发事件For more information, see Handling and Raising Events.

OnDoubleClick 方法还允许派生类对事件进行处理而不必附加委托。The OnDoubleClick method also allows derived classes to handle the event without attaching a delegate. 这是在派生类中处理事件的首选技术。This is the preferred technique for handling the event in a derived class.

继承者说明

在派生类中重写 OnDoubleClick(EventArgs) 时,一定要调用基类的 OnDoubleClick(EventArgs) 方法,以便已注册的委托对事件进行接收。When overriding OnDoubleClick(EventArgs) in a derived class, be sure to call the base class's OnDoubleClick(EventArgs) method so that registered delegates receive the event.

适用于