通过

Observable.FromEvent<TEventArgs> 方法 (Action<<TEventArgs>>、Action<Action<TEventArgs>>)

将 .NET 事件转换为可观察序列。

Namespace：System.Reactive.Linq
装配： System.Reactive.dll) 中的 System.Reactive (

语法

'Declaration
Public Shared Function FromEvent(Of TEventArgs) ( _
    addHandler As Action(Of Action(Of TEventArgs)), _
    removeHandler As Action(Of Action(Of TEventArgs)) _
) As IObservable(Of TEventArgs)

'Usage
Dim addHandler As Action(Of Action(Of TEventArgs))
Dim removeHandler As Action(Of Action(Of TEventArgs))
Dim returnValue As IObservable(Of TEventArgs)

returnValue = Observable.FromEvent(addHandler, _
    removeHandler)

public static IObservable<TEventArgs> FromEvent<TEventArgs>(
    Action<Action<TEventArgs>> addHandler,
    Action<Action<TEventArgs>> removeHandler
)

public:
generic<typename TEventArgs>
static IObservable<TEventArgs>^ FromEvent(
    Action<Action<TEventArgs>^>^ addHandler, 
    Action<Action<TEventArgs>^>^ removeHandler
)

static member FromEvent : 
        addHandler:Action<Action<'TEventArgs>> * 
        removeHandler:Action<Action<'TEventArgs>> -> IObservable<'TEventArgs> 

JScript does not support generic types and methods.

类型参数

  • TEventArgs
    事件的类型。

parameters

  • addHandler
    类型： System.Action<Action<TEventArgs>>
    将给定事件处理程序附加到基础 .NET 事件的操作。
  • removeHandler
    类型： System.Action<Action<TEventArgs>>
    将给定事件处理程序与基础 .NET 事件分离的操作。

返回值

类型： System.IObservable<TEventArgs>
包含基础 .NET 事件调用的数据表示形式的可观察序列。

另请参阅

参考

可观测类

FromEvent 重载

System.Reactive.Linq 命名空间