Observable.FromAsyncPattern<TResult> 方法 (Func<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 TResult) ( _
    begin As Func(Of AsyncCallback, Object, IAsyncResult), _
    end As Func(Of IAsyncResult, TResult) _
) As Func(Of IObservable(Of TResult))

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

returnValue = Observable.FromAsyncPattern(begin, _
    end)

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

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

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

JScript does not support generic types and methods.

类型参数

• TResult
  结果的类型。

参数

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

• end
  类型： System.Func<IAsyncResult、TResult>
  end invoke 函数。

返回值

类型： System.Func<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