PropertyChangedEventHandler 委托

定义

表示将处理 PropertyChanged 事件的方法,该事件在更改组件上的属性时引发。Represents the method that will handle the PropertyChanged event raised when a property is changed on a component.

public delegate void PropertyChangedEventHandler(System::Object ^ sender, PropertyChangedEventArgs ^ e);
public delegate void PropertyChangedEventHandler(object sender, PropertyChangedEventArgs e);
type PropertyChangedEventHandler = delegate of obj * PropertyChangedEventArgs -> unit
Public Delegate Sub PropertyChangedEventHandler(sender As Object, e As PropertyChangedEventArgs)

参数

sender
Object

事件源。The source of the event.

e
PropertyChangedEventArgs

包含事件数据的 PropertyChangedEventArgsA PropertyChangedEventArgs that contains the event data.

继承
PropertyChangedEventHandler

注解

创建 PropertyChangedEventHandler 委托时,需要标识将处理该事件的方法。When you create a PropertyChangedEventHandler delegate, you identify the method that will handle the event. 若要将事件与事件处理程序关联,请将该委托的一个实例添加到事件中。To associate the event with your event handler, add an instance of the delegate to the event. 只要事件发生, 就会调用事件处理程序方法, 除非删除委托。The event-handler method is called whenever the event occurs, unless you remove the delegate. 有关事件处理程序委托的详细信息, 请参阅处理和引发事件For more information about event-handler delegates, see Handling and Raising Events.

扩展方法

GetMethodInfo(Delegate)

获取指示指定委托表示的方法的对象。Gets an object that represents the method represented by the specified delegate.

适用于

另请参阅