MongoQueryableGroupJoinTOuter, TInner, TKey, TResult Method (IMongoQueryableTOuter, IMongoCollectionTInner, ExpressionFuncTOuter, TKey, ExpressionFuncTInner, TKey, ExpressionFuncTOuter, IEnumerableTInner, TResult) (original) (raw)
Correlates the elements of two sequences based on key equality and groups the results.
Namespace: MongoDB.Driver.Linq
Assembly: MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.10.0+569905ff5e778c38ea19d9d0392496a83e1704ed
Syntax
public static IMongoQueryable GroupJoin<TOuter, TInner, TKey, TResult>( this IMongoQueryable outer, IMongoCollection inner, Expression<Func<TOuter, TKey>> outerKeySelector, Expression<Func<TInner, TKey>> innerKeySelector, Expression<Func<TOuter, IEnumerable, TResult>> resultSelector )
Public Shared Function GroupJoin(Of TOuter, TInner, TKey, TResult) ( outer As IMongoQueryable(Of TOuter), inner As IMongoCollection(Of TInner), outerKeySelector As Expression(Of Func(Of TOuter, TKey)), innerKeySelector As Expression(Of Func(Of TInner, TKey)), resultSelector As Expression(Of Func(Of TOuter, IEnumerable(Of TInner), TResult)) ) As IMongoQueryable(Of TResult)[] static member GroupJoin : outer : IMongoQueryable<'TOuter> * inner : IMongoCollection<'TInner> * outerKeySelector : Expression<Func<'TOuter, 'TKey>> * innerKeySelector : Expression<Func<'TInner, 'TKey>> * resultSelector : Expression<Func<'TOuter, IEnumerable<'TInner>, 'TResult>> -> IMongoQueryable<'TResult>
Parameters
outer
Type: MongoDB.Driver.LinqIMongoQueryableTOuter
The first sequence to join.
inner
Type: MongoDB.DriverIMongoCollectionTInner
The collection to join to the first sequence.
outerKeySelector
Type: System.Linq.ExpressionsExpressionFuncTOuter, TKey
A function to extract the join key from each element of the first sequence.
innerKeySelector
Type: System.Linq.ExpressionsExpressionFuncTInner, TKey
A function to extract the join key from each element of the second sequence.
resultSelector
Type: System.Linq.ExpressionsExpressionFuncTOuter, IEnumerableTInner, TResult
A function to create a result element from an element from the first sequence and a collection of matching elements from the second sequence.
Type Parameters
TOuter
The type of the elements of the first sequence.
TInner
The type of the elements of the second sequence.
TKey
The type of the keys returned by the key selector functions.
TResult
The type of the result elements.
Return Value
Type: IMongoQueryableTResult
An IMongoQueryableT that contains elements of type TResult obtained by performing a grouped join on two sequences.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type IMongoQueryableTOuter. 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