Observable.FromEvent<TDelegate, TEventArgs> 方法 (Func<EventHandler<TEventArgs>, TDelegate>, Action<TDelegate>, Action<TDelegate>)

命名空间：  Microsoft.Phone.Reactive
程序集：  Microsoft.Phone.Reactive（在 Microsoft.Phone.Reactive.dll 中）

语法

声明
Public Shared Function FromEvent(Of TDelegate, TEventArgs As EventArgs) ( _
    conversion As Func(Of EventHandler(Of TEventArgs), TDelegate), _
    addHandler As Action(Of TDelegate), _
    removeHandler As Action(Of TDelegate) _
) As IObservable(Of IEvent(Of TEventArgs))

public static IObservable<IEvent<TEventArgs>> FromEvent<TDelegate, TEventArgs>(
    Func<EventHandler<TEventArgs>, TDelegate> conversion,
    Action<TDelegate> addHandler,
    Action<TDelegate> removeHandler
)
where TEventArgs : EventArgs

public:
generic<typename TDelegate, typename TEventArgs>
where TEventArgs : EventArgs
static IObservable<IEvent<TEventArgs>^>^ FromEvent(
    Func<EventHandler<TEventArgs>^, TDelegate>^ conversion, 
    Action<TDelegate>^ addHandler, 
    Action<TDelegate>^ removeHandler
)

static member FromEvent : 
        conversion:Func<EventHandler<'TEventArgs>, 'TDelegate> * 
        addHandler:Action<'TDelegate> * 
        removeHandler:Action<'TDelegate> -> IObservable<IEvent<'TEventArgs>>  when 'TEventArgs : EventArgs

类型参数

• TDelegate

• TEventArgs

参数

• conversion
  类型：System.Func<EventHandler<TEventArgs>, TDelegate>

• addHandler
  类型：System.Action<TDelegate>

• removeHandler
  类型：System.Action<TDelegate>

返回值

类型：System.IObservable<IEvent<TEventArgs>>

版本信息

适用于 Windows Phone 应用的 .NET

受以下版本支持：Windows Phone 8、Silverlight 8.1

.NET Framework 安全性

• 对直接调用方的完全信任。此成员不能由部分信任的代码使用。有关详细信息，请参阅通过部分受信任的代码使用库。

请参阅

参考

Observable 类

FromEvent 重载

Microsoft.Phone.Reactive 命名空间