ToolStripItem.OnClick(EventArgs) ToolStripItem.OnClick(EventArgs) ToolStripItem.OnClick(EventArgs) ToolStripItem.OnClick(EventArgs) Method

定义

引发 Click 事件。Raises the Click event.

protected:
 virtual void OnClick(EventArgs ^ e);
protected virtual void OnClick (EventArgs e);
abstract member OnClick : EventArgs -> unit
override this.OnClick : EventArgs -> unit
Protected Overridable Sub OnClick (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OnClick方法。The following code example demonstrates how to override the OnClick 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 Click event.
// It simply toggles the state of the clickedValue field.
protected override void OnClick(EventArgs e)
{
    base.OnClick(e);

    this.clickedValue ^= true;
}
' The method defines the behavior of the Click event.
' It simply toggles the state of the clickedValue field.
Protected Overrides Sub OnClick(e As EventArgs)
   MyBase.OnClick(e)
   
     Me.clickedValue = Me.clickedValue Xor True
 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.

OnClick 方法还允许派生类对事件进行处理而不必附加委托。The OnClick 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 OnClick(EventArgs) 时,一定要调用基类的 OnClick(EventArgs) 方法,以便已注册的委托对事件进行接收。When overriding OnClick(EventArgs) in a derived class, be sure to call the base class's OnClick(EventArgs) method so that registered delegates receive the event.

适用于