PipelineStageDefinitionBuilderGroupTInput, TValue, TOutput Method (ExpressionFuncTInput, TValue, ExpressionFuncIGroupingTValue, TInput, TOutput, ExpressionTranslationOptions) |
Creates a $group stage (this method can only be used with LINQ2).
Namespace:
MongoDB.Driver
Assembly:
MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.15.0+f503bf610759c13f78cff9a3c01e91453185d2ed
Syntax public static PipelineStageDefinition<TInput, TOutput> Group<TInput, TValue, TOutput>(
Expression<Func<TInput, TValue>> value,
Expression<Func<IGrouping<TValue, TInput>, TOutput>> group,
ExpressionTranslationOptions translationOptions = null
)
Public Shared Function Group(Of TInput, TValue, TOutput) (
value As Expression(Of Func(Of TInput, TValue)),
group As Expression(Of Func(Of IGrouping(Of TValue, TInput), TOutput)),
Optional translationOptions As ExpressionTranslationOptions = Nothing
) As PipelineStageDefinition(Of TInput, TOutput)
static member Group :
value : Expression<Func<'TInput, 'TValue>> *
group : Expression<Func<IGrouping<'TValue, 'TInput>, 'TOutput>> *
?translationOptions : ExpressionTranslationOptions
(* Defaults:
let _translationOptions = defaultArg translationOptions null
*)
-> PipelineStageDefinition<'TInput, 'TOutput>
Parameters
- value
- Type: System.Linq.ExpressionsExpressionFuncTInput, TValue
The value field. - group
- Type: System.Linq.ExpressionsExpressionFuncIGroupingTValue, TInput, TOutput
The group projection. - translationOptions (Optional)
- Type: MongoDB.DriverExpressionTranslationOptions
The translation options.
Type Parameters
- TInput
- The type of the input documents.
- TValue
- The type of the values.
- TOutput
- The type of the output documents.
Return Value
Type:
PipelineStageDefinitionTInput,
TOutputThe stage.
Remarks This method can only be used with LINQ2 but that can't be verified until Render is called.
See Also