共用方式為


Qbservable.ToDictionary < TSource, TKey, TElement > 方法 (IQbservable < TSource > , Expression Func TSource, TKey >> , Expression << Func << TSource, TElement >>)

根據指定的索引鍵選取器函式和元素選取器函式,從可查詢的可觀察序列建立字典。

Namespace:System.Reactive.Linq
裝配: System.Reactive.Providers.dll) 中的 System.Reactive.Providers (

Syntax

'Declaration
<ExtensionAttribute> _
Public Shared Function ToDictionary(Of TSource, TKey, TElement) ( _
    source As IQbservable(Of TSource), _
    keySelector As Expression(Of Func(Of TSource, TKey)), _
    elementSelector As Expression(Of Func(Of TSource, TElement)) _
) As IQbservable(Of IDictionary(Of TKey, TElement))
'Usage
Dim source As IQbservable(Of TSource)
Dim keySelector As Expression(Of Func(Of TSource, TKey))
Dim elementSelector As Expression(Of Func(Of TSource, TElement))
Dim returnValue As IQbservable(Of IDictionary(Of TKey, TElement))

returnValue = source.ToDictionary(keySelector, _
    elementSelector)
public static IQbservable<IDictionary<TKey, TElement>> ToDictionary<TSource, TKey, TElement>(
    this IQbservable<TSource> source,
    Expression<Func<TSource, TKey>> keySelector,
    Expression<Func<TSource, TElement>> elementSelector
)
[ExtensionAttribute]
public:
generic<typename TSource, typename TKey, typename TElement>
static IQbservable<IDictionary<TKey, TElement>^>^ ToDictionary(
    IQbservable<TSource>^ source, 
    Expression<Func<TSource, TKey>^>^ keySelector, 
    Expression<Func<TSource, TElement>^>^ elementSelector
)
static member ToDictionary : 
        source:IQbservable<'TSource> * 
        keySelector:Expression<Func<'TSource, 'TKey>> * 
        elementSelector:Expression<Func<'TSource, 'TElement>> -> IQbservable<IDictionary<'TKey, 'TElement>> 
JScript does not support generic types and methods.

類型參數

  • TSource
    來源的類型。
  • TKey
    索引鍵類型。
  • TElement
    項目的型別。

參數

傳回值

類型:System.Reactive.Linq.IQbservable<IDictionary< TKey, TElement>>
根據指定的索引鍵選取器函式和元素選取器函式,從可查詢的可觀察序列字典。

使用注意事項

在 Visual Basic 和 C# 中,您可以在IQbservable< TSource > 類型的任何物件上呼叫這個方法作為實例方法。 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

另請參閱

參考

Qbservable 類別

ToDictionary 多載

System.Reactive.Linq 命名空間