DataGridView.OnValidating(CancelEventArgs) 方法

定义

引发 Validating 事件。Raises the Validating event.

protected:
 override void OnValidating(System::ComponentModel::CancelEventArgs ^ e);
protected override void OnValidating (System.ComponentModel.CancelEventArgs e);
override this.OnValidating : System.ComponentModel.CancelEventArgs -> unit
Protected Overrides Sub OnValidating (e As CancelEventArgs)

参数

e
CancelEventArgs

包含事件数据的 CancelEventArgsA CancelEventArgs that contains the event data.

异常

验证失败,且没有 DataError 事件的处理程序或处理程序已将 ThrowException 属性设置为 trueValidation 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.

注解

除了引发 @no__t 0 事件外,此方法还结束当前单元格编辑并验证单元和行值。In addition to raising the Validating event, this method ends the current cell edit and validates the cell and row values.

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.

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

适用于

另请参阅