DataGridView.OnCellToolTipTextNeeded(DataGridViewCellToolTipTextNeededEventArgs) 方法

定义

引发 CellToolTipTextNeeded 事件。Raises the CellToolTipTextNeeded event.

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

参数

异常

eColumnIndex 属性值大于控件中的列数减一。The value of the ColumnIndex property of e is greater than the number of columns in the control minus one.

- 或 --or- eRowIndex 属性值大于控件中的行数减一。The value of the RowIndex property of e is greater than the number of rows in the control minus one.

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.

OnCellToolTipTextNeeded 方法还允许派生类对事件进行处理而不必附加委托。The OnCellToolTipTextNeeded 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 OnCellToolTipTextNeeded(DataGridViewCellToolTipTextNeededEventArgs) 时,请确保调用基类 "OnCellToolTipTextNeeded(DataGridViewCellToolTipTextNeededEventArgs) 方法,以便注册的委托接收事件。When overriding OnCellToolTipTextNeeded(DataGridViewCellToolTipTextNeededEventArgs) in a derived class, be sure to call the base class' OnCellToolTipTextNeeded(DataGridViewCellToolTipTextNeededEventArgs) method so that registered delegates receive the event.

适用于

另请参阅