Observable.FromAsyncPattern 方法 (Func<AsyncCallback、Object、IAsyncResult>、Action<IAsyncResult>)

将 Begin/End 调用函数对转换为异步函数。

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

语法

'Declaration
Public Shared Function FromAsyncPattern ( _
    begin As Func(Of AsyncCallback, Object, IAsyncResult), _
    end As Action(Of IAsyncResult) _
) As Func(Of IObservable(Of Unit))

'Usage
Dim begin As Func(Of AsyncCallback, Object, IAsyncResult)
Dim end As Action(Of IAsyncResult)
Dim returnValue As Func(Of IObservable(Of Unit))

returnValue = Observable.FromAsyncPattern(begin, _
    end)

public static Func<IObservable<Unit>> FromAsyncPattern(
    Func<AsyncCallback, Object, IAsyncResult> begin,
    Action<IAsyncResult> end
)

public:
static Func<IObservable<Unit>^>^ FromAsyncPattern(
    Func<AsyncCallback^, Object^, IAsyncResult^>^ begin, 
    Action<IAsyncResult^>^ end
)

static member FromAsyncPattern : 
        begin:Func<AsyncCallback, Object, IAsyncResult> * 
        end:Action<IAsyncResult> -> Func<IObservable<Unit>> 

public static function FromAsyncPattern(
    begin : Func<AsyncCallback, Object, IAsyncResult>, 
    end : Action<IAsyncResult>
) : Func<IObservable<Unit>>

参数

• begin
  类型： System.Func<AsyncCallback、 Object、 IAsyncResult>
  begin 调用函数。

• end
  类型： System.Action<IAsyncResult>
  end invoke 函数。

返回值

类型： System.Func<IObservable<Unit>>
开始/结束调用函数对。

另请参阅

参考

可观测类

FromAsyncPattern 重载

System.Reactive.Linq 命名空间