MongoQueryableJoinTOuter, TInner, TKey, TResult Method (IMongoQueryableTOuter, IMongoCollectionTInner, ExpressionFuncTOuter, TKey, ExpressionFuncTInner, TKey, ExpressionFuncTOuter, TInner, TResult) |
Correlates the elements of two sequences based on matching keys.
Namespace:
MongoDB.Driver.Linq
Assembly:
MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.5.0+57.Branch.master.Sha.6a4e00a2d91090c65a9b11364b9ebfdb9c7da076
Syntax public static IMongoQueryable<TResult> Join<TOuter, TInner, TKey, TResult>(
this IMongoQueryable<TOuter> outer,
IMongoCollection<TInner> inner,
Expression<Func<TOuter, TKey>> outerKeySelector,
Expression<Func<TInner, TKey>> innerKeySelector,
Expression<Func<TOuter, TInner, TResult>> resultSelector
)
<ExtensionAttribute>
Public Shared Function Join(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, TInner, TResult))
) As IMongoQueryable(Of TResult)
[<ExtensionAttribute>]
static member Join :
outer : IMongoQueryable<'TOuter> *
inner : IMongoCollection<'TInner> *
outerKeySelector : Expression<Func<'TOuter, 'TKey>> *
innerKeySelector : Expression<Func<'TInner, 'TKey>> *
resultSelector : Expression<Func<'TOuter, 'TInner, 'TResult>> -> IMongoQueryable<'TResult>
Parameters
- outer
- Type: MongoDB.Driver.LinqIMongoQueryableTOuter
The first sequence to join. - inner
- Type: MongoDB.DriverIMongoCollectionTInner
The sequence 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, TInner, TResult
A function to create a result element from two matching elements.
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
IQueryableT that has elements of type
TResult obtained by performing an inner 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