TreeView.OnAfterExpand(TreeViewEventArgs) TreeView.OnAfterExpand(TreeViewEventArgs) TreeView.OnAfterExpand(TreeViewEventArgs) TreeView.OnAfterExpand(TreeViewEventArgs) Method

定义

引发 AfterExpand 事件。Raises the AfterExpand event.

protected:
 virtual void OnAfterExpand(System::Windows::Forms::TreeViewEventArgs ^ e);
protected virtual void OnAfterExpand (System.Windows.Forms.TreeViewEventArgs e);
abstract member OnAfterExpand : System.Windows.Forms.TreeViewEventArgs -> unit
override this.OnAfterExpand : System.Windows.Forms.TreeViewEventArgs -> unit
Protected Overridable Sub OnAfterExpand (e As TreeViewEventArgs)

参数

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.

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

适用于

另请参阅