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

Groups the source stream by the specified key selector functions and projects results using the element selector function.

Namespace:  Microsoft.ComplexEventProcessing.Linq
Assembly:  Microsoft.ComplexEventProcessing (in Microsoft.ComplexEventProcessing.dll)

Syntax

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

Type Parameters

  • TPayload
    Payload type of the input event.
  • TGroupingKey
    Grouping key event type.
  • TResult
    Payload type of result events.

Parameters

Return Value

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

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type CepStream<TPayload>. When you use instance method syntax to call this method, omit the first parameter. For more information, see https://msdn.microsoft.com/en-us/library/bb384936(v=sql.105) or https://msdn.microsoft.com/en-us/library/bb383977(v=sql.105).

See Also

Reference

CepStream Class

GroupBy Overload

Microsoft.ComplexEventProcessing.Linq Namespace