DataTable.OnPropertyChanging(PropertyChangedEventArgs) 方法
定义
引发 PropertyChanged 事件。Raises the PropertyChanged event.
protected:
virtual void OnPropertyChanging(System::ComponentModel::PropertyChangedEventArgs ^ pcevent);
protected public:
virtual void OnPropertyChanging(System::ComponentModel::PropertyChangedEventArgs ^ pcevent);
protected virtual void OnPropertyChanging (System.ComponentModel.PropertyChangedEventArgs pcevent);
protected internal virtual void OnPropertyChanging (System.ComponentModel.PropertyChangedEventArgs pcevent);
abstract member OnPropertyChanging : System.ComponentModel.PropertyChangedEventArgs -> unit
override this.OnPropertyChanging : System.ComponentModel.PropertyChangedEventArgs -> unit
Protected Overridable Sub OnPropertyChanging (pcevent As PropertyChangedEventArgs)
Protected Friend Overridable Sub OnPropertyChanging (pcevent As PropertyChangedEventArgs)
参数
- pcevent
- PropertyChangedEventArgs
包含事件数据的 PropertyChangedEventArgs。A PropertyChangedEventArgs 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. 有关概述,请参阅 处理和引发事件。For an overview, see Handling and Raising Events.
继承者说明
当 OnPropertyChanging(PropertyChangedEventArgs) 在派生类中重写时,请确保调用基类的 OnPropertyChanging(PropertyChangedEventArgs) 方法。When overriding OnPropertyChanging(PropertyChangedEventArgs) in a derived class, be sure to call the base class's OnPropertyChanging(PropertyChangedEventArgs) method.