將 Begin/End invoke 函式組轉換成非同步函式。
Namespace：System.Reactive.Linq
裝配： System.Reactive.Providers.dll) 中的 System.Reactive.Providers (
Syntax
'Declaration
<ExtensionAttribute> _
Public Shared Function FromAsyncPattern(Of T1, TResult) ( _
provider As IQbservableProvider, _
begin As Expression(Of Func(Of T1, AsyncCallback, Object, IAsyncResult)), _
end As Expression(Of Func(Of IAsyncResult, TResult)) _
) As Func(Of T1, IQbservable(Of TResult))
'Usage
Dim provider As IQbservableProvider
Dim begin As Expression(Of Func(Of T1, AsyncCallback, Object, IAsyncResult))
Dim end As Expression(Of Func(Of IAsyncResult, TResult))
Dim returnValue As Func(Of T1, IQbservable(Of TResult))
returnValue = provider.FromAsyncPattern(begin, _
end)
public static Func<T1, IQbservable<TResult>> FromAsyncPattern<T1, TResult>(
this IQbservableProvider provider,
Expression<Func<T1, AsyncCallback, Object, IAsyncResult>> begin,
Expression<Func<IAsyncResult, TResult>> end
)
[ExtensionAttribute]
public:
generic<typename T1, typename TResult>
static Func<T1, IQbservable<TResult>^>^ FromAsyncPattern(
IQbservableProvider^ provider,
Expression<Func<T1, AsyncCallback^, Object^, IAsyncResult^>^>^ begin,
Expression<Func<IAsyncResult^, TResult>^>^ end
)
static member FromAsyncPattern :
provider:IQbservableProvider *
begin:Expression<Func<'T1, AsyncCallback, Object, IAsyncResult>> *
end:Expression<Func<IAsyncResult, 'TResult>> -> Func<'T1, IQbservable<'TResult>>
JScript does not support generic types and methods.
類型參數
- T1
函式的第一種類型。
- TResult
結果的類型。
參數
- provider
類型： System.Reactive.Linq.IQbservableProvider
本機 Qbservable 提供者。
- begin
類型：System.Linq.Expressions.Expression<Func< T1、AsyncCallback、Object、IAsyncResult>>
begin invoke 函式。
- end
類型：System.Linq.Expressions.Expression<Func<IAsyncResult、 TResult>>
結束叫用函式。
傳回值
類型：System.Func< T1、IQbservable< TResult>>
結束叫用函式。
使用注意事項
在 Visual Basic 和 C# 中，您可以在 IQbservableProvider類型的任何物件上呼叫此方法作為實例方法。 使用執行個體方法語法呼叫這個方法時，請省略第一個參數。 如需詳細資訊，請參閱 或 。