IChangeToken.RegisterChangeCallback(Action<Object>, Object) 方法
定义
注册将在项更改时调用的回叫。Registers for a callback that will be invoked when the entry has changed. 调用回叫之前,必须设置 HasChanged。HasChanged MUST be set before the callback is invoked.
public:
IDisposable ^ RegisterChangeCallback(Action<System::Object ^> ^ callback, System::Object ^ state);
public IDisposable RegisterChangeCallback (Action<object> callback, object state);
abstract member RegisterChangeCallback : Action<obj> * obj -> IDisposable
Public Function RegisterChangeCallback (callback As Action(Of Object), state As Object) As IDisposable
参数
- state
- Object
要传递给该回叫的状态。State to be passed into the callback.
返回
可用于注销回叫的 IDisposable。An IDisposable that is used to unregister the callback.