通过

Observable.FromAsyncPattern<T1， T2， T3， TResult> 方法 (Func<T1， T2， T3， AsyncCallback， Object， IAsyncResult>， Func<IAsyncResult， TResult>)

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(Of T1, T2, T3, TResult) ( _
    begin As Func(Of T1, T2, T3, AsyncCallback, Object, IAsyncResult), _
    end As Func(Of IAsyncResult, TResult) _
) As Func(Of T1, T2, T3, IObservable(Of TResult))

'Usage
Dim begin As Func(Of T1, T2, T3, AsyncCallback, Object, IAsyncResult)
Dim end As Func(Of IAsyncResult, TResult)
Dim returnValue As Func(Of T1, T2, T3, IObservable(Of TResult))

returnValue = Observable.FromAsyncPattern(begin, _
    end)

public static Func<T1, T2, T3, IObservable<TResult>> FromAsyncPattern<T1, T2, T3, TResult>(
    Func<T1, T2, T3, AsyncCallback, Object, IAsyncResult> begin,
    Func<IAsyncResult, TResult> end
)

public:
generic<typename T1, typename T2, typename T3, typename TResult>
static Func<T1, T2, T3, IObservable<TResult>^>^ FromAsyncPattern(
    Func<T1, T2, T3, AsyncCallback^, Object^, IAsyncResult^>^ begin, 
    Func<IAsyncResult^, TResult>^ end
)

static member FromAsyncPattern : 
        begin:Func<'T1, 'T2, 'T3, AsyncCallback, Object, IAsyncResult> * 
        end:Func<IAsyncResult, 'TResult> -> Func<'T1, 'T2, 'T3, IObservable<'TResult>> 

JScript does not support generic types and methods.

类型参数

  • T1
    第一种类型的函数。
  • T2
    第二种类型的函数。
  • T3
    第三种类型的函数。
  • TResult
    结果的类型。

parameters

返回值

类型： System.Func<T1、T2、T3、 IObservable<TResult>>
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