DataGridView.OnDataError(Boolean, DataGridViewDataErrorEventArgs) 方法

定义

引发 DataError 事件。Raises the DataError event.

protected:
 virtual void OnDataError(bool displayErrorDialogIfNoHandler, System::Windows::Forms::DataGridViewDataErrorEventArgs ^ e);
protected virtual void OnDataError (bool displayErrorDialogIfNoHandler, System.Windows.Forms.DataGridViewDataErrorEventArgs e);
abstract member OnDataError : bool * System.Windows.Forms.DataGridViewDataErrorEventArgs -> unit
override this.OnDataError : bool * System.Windows.Forms.DataGridViewDataErrorEventArgs -> unit
Protected Overridable Sub OnDataError (displayErrorDialogIfNoHandler As Boolean, e As DataGridViewDataErrorEventArgs)

参数

displayErrorDialogIfNoHandler
Boolean

如果要在没有 DataError 事件的处理程序的情况下显示错误对话框,则为 truetrue to display an error dialog box if there is no handler for the DataError event.

e
DataGridViewDataErrorEventArgs

包含事件数据的 DataGridViewDataErrorEventArgsA DataGridViewDataErrorEventArgs that contains the event data.

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.

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

适用于

另请参阅