DataGridView.OnEnter(EventArgs) 方法


引发 Enter 事件。Raises the Enter event.

 override void OnEnter(EventArgs ^ e);
protected override void OnEnter (EventArgs e);
override this.OnEnter : EventArgs -> unit
Protected Overrides Sub OnEnter (e As EventArgs)



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


此控件配置为在接收到焦点后进入编辑模式,但是进入焦点后,当前单元格的 EditType 属性不表示从 Control 派生并实现 IDataGridViewEditingControl 的类。The control is configured to enter edit mode when it receives focus, but upon entering focus, the EditType property of the current cell does not indicate a class that derives from Control and implements IDataGridViewEditingControl.

该控件配置为在收到焦点时进入编辑模式,但是对编辑单元格值的初始化失败,DataError 事件没有处理程序,或者处理程序已将 ThrowException 属性设置为 trueThe control is configured to enter edit mode when it receives focus, but initialization of the editing cell value failed and either there is no handler for the DataError event or the handler has set the ThrowException property to true. 通常情况下,可将该异常对象强制转换为类型 FormatExceptionThe exception object can typically be cast to type FormatException.


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.

OnEnter 方法还允许派生类对事件进行处理而不必附加委托。The OnEnter 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.


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