IAggregateFluentExtensions.Group<TResult, TKey, TNewResult> Method (IAggregateFluent<TResult>, Expression<Func<TResult, TKey>>, Expression<Func<IGrouping<TKey, TResult>, TNewResult>>) |
Appends a group stage to the pipeline.
Namespace:
MongoDB.Driver
Assembly:
MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.20.0+ee01960089f28ea1b501690df5fc9f6318a70242
Syntaxpublic static IAggregateFluent<TNewResult> Group<TResult, TKey, TNewResult>(
this IAggregateFluent<TResult> aggregate,
Expression<Func<TResult, TKey>> id,
Expression<Func<IGrouping<TKey, TResult>, TNewResult>> group
)
<ExtensionAttribute>
Public Shared Function Group(Of TResult, TKey, TNewResult) (
aggregate As IAggregateFluent(Of TResult),
id As Expression(Of Func(Of TResult, TKey)),
group As Expression(Of Func(Of IGrouping(Of TKey, TResult), TNewResult))
) As IAggregateFluent(Of TNewResult)
[<ExtensionAttribute>]
static member Group :
aggregate : IAggregateFluent<'TResult> *
id : Expression<Func<'TResult, 'TKey>> *
group : Expression<Func<IGrouping<'TKey, 'TResult>, 'TNewResult>> -> IAggregateFluent<'TNewResult>
Parameters
- aggregate
- Type: MongoDB.Driver.IAggregateFluent<TResult>
The aggregate. - id
- Type: System.Linq.Expressions.Expression<Func<TResult, TKey>>
The id. - group
- Type: System.Linq.Expressions.Expression<Func<IGrouping<TKey, TResult>, TNewResult>>
The group projection.
Type Parameters
- TResult
- The type of the result.
- TKey
- The type of the key.
- TNewResult
- The type of the new result.
Return Value
Type:
IAggregateFluent<TNewResult>
The fluent aggregate interface.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type
IAggregateFluent<TResult>. When you use instance method syntax to call this method, omit the first parameter. For more information, see
Extension Methods (Visual Basic) or
Extension Methods (C# Programming Guide).
See Also