QStreamable.GroupBy<TPayload, TKey> Method (IQStreamable<TPayload>, Expression<Func<TPayload, TKey>>)
Partition operator.
Namespace: Microsoft.ComplexEventProcessing.Linq
Assembly: Microsoft.ComplexEventProcessing (in Microsoft.ComplexEventProcessing.dll)
Syntax
'Declaration
<ExtensionAttribute> _
Public Shared Function GroupBy(Of TPayload, TKey) ( _
source As IQStreamable(Of TPayload), _
keySelector As Expression(Of Func(Of TPayload, TKey)) _
) As IQPartitionedStreamable(Of TKey, TPayload)
'Usage
Dim source As IQStreamable(Of TPayload)
Dim keySelector As Expression(Of Func(Of TPayload, TKey))
Dim returnValue As IQPartitionedStreamable(Of TKey, TPayload)
returnValue = source.GroupBy(keySelector)
public static IQPartitionedStreamable<TKey, TPayload> GroupBy<TPayload, TKey>(
this IQStreamable<TPayload> source,
Expression<Func<TPayload, TKey>> keySelector
)
[ExtensionAttribute]
public:
generic<typename TPayload, typename TKey>
static IQPartitionedStreamable<TKey, TPayload>^ GroupBy(
IQStreamable<TPayload>^ source,
Expression<Func<TPayload, TKey>^>^ keySelector
)
static member GroupBy :
source:IQStreamable<'TPayload> *
keySelector:Expression<Func<'TPayload, 'TKey>> -> IQPartitionedStreamable<'TKey, 'TPayload>
JScript does not support generic types and methods.
Type Parameters
- TPayload
The input payload type.
- TKey
The type of partition key.
Parameters
- source
Type: Microsoft.ComplexEventProcessing.Linq.IQStreamable<TPayload>
The input stream.
- keySelector
Type: System.Linq.Expressions.Expression<Func<TPayload, TKey>>
The key projection expression.
Return Value
Type: Microsoft.ComplexEventProcessing.Linq.IQPartitionedStreamable<TKey, TPayload>
The partitioned stream.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type IQStreamable<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.111) or https://msdn.microsoft.com/en-us/library/bb383977(v=sql.111).