CepStream.GroupBy<TPayload, TGroupingKey, TResult> 方法 (CepStream<TPayload>, Expression<Func<TPayload, TGroupingKey>>, Expression<Func<TPayload, TResult>>)

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依指定的索引鍵選取器函數來分組來源資料流，然後使用元素選擇器函數投射結果。

命名空間:   Microsoft.ComplexEventProcessing.Linq
組件:  Microsoft.ComplexEventProcessing (在 Microsoft.ComplexEventProcessing.dll 中)

語法

public static CepGroupingStreams<TResult, TGroupingKey> GroupBy<TPayload, TGroupingKey, TResult>(
    this CepStream<TPayload> source,
    Expression<Func<TPayload, TGroupingKey>> keySelector,
    Expression<Func<TPayload, TResult>> selector
)

public:
generic<typename TPayload, typename TGroupingKey, typename TResult>
[ExtensionAttribute]
static CepGroupingStreams<TResult, TGroupingKey>^ GroupBy(
    CepStream<TPayload>^ source,
    Expression<Func<TPayload, TGroupingKey>^>^ keySelector,
    Expression<Func<TPayload, TResult>^>^ selector
)

static member GroupBy<'TPayload, 'TGroupingKey, 'TResult> : 
        source:CepStream<'TPayload> *
        keySelector:Expression<Func<'TPayload, 'TGroupingKey>> *
        selector:Expression<Func<'TPayload, 'TResult>> -> CepGroupingStreams<'TResult, 'TGroupingKey>

<ExtensionAttribute>
Public Shared Function GroupBy(Of TPayload, TGroupingKey, TResult) (
    source As CepStream(Of TPayload),
    keySelector As Expression(Of Func(Of TPayload, TGroupingKey)),
    selector As Expression(Of Func(Of TPayload, TResult))
) As CepGroupingStreams(Of TResult, TGroupingKey)

參數

  • source
    輸入資料流。
  • keySelector
    定義索引鍵值的運算式。
  • selector
    投射結果的運算式。

傳回值

Type: Microsoft.ComplexEventProcessing.Linq.CepGroupingStreams<TResult, TGroupingKey>

資料流的群組。

類型參數

  • TPayload
    輸入事件的裝載類型。
  • TGroupingKey
    群組索引鍵的事件類型。
  • TResult
    結果事件的裝載類型。

請參閱

GroupBy 超載
CepStream 類別
Microsoft.ComplexEventProcessing.Linq 命名空間

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