MongoQueryableSelectManyTSource, TCollection, TResult Method (IMongoQueryableTSource, ExpressionFuncTSource, IEnumerableTCollection, ExpressionFuncTSource, TCollection, TResult) |
Projects each element of a sequence to an
IEnumerableT and
invokes a result selector function on each element therein. The resulting values from
each intermediate sequence are combined into a single, one-dimensional sequence and returned.
Namespace:
MongoDB.Driver.Linq
Assembly:
MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.15.0+f503bf610759c13f78cff9a3c01e91453185d2ed
Syntax public static IMongoQueryable<TResult> SelectMany<TSource, TCollection, TResult>(
this IMongoQueryable<TSource> source,
Expression<Func<TSource, IEnumerable<TCollection>>> collectionSelector,
Expression<Func<TSource, TCollection, TResult>> resultSelector
)
<ExtensionAttribute>
Public Shared Function SelectMany(Of TSource, TCollection, TResult) (
source As IMongoQueryable(Of TSource),
collectionSelector As Expression(Of Func(Of TSource, IEnumerable(Of TCollection))),
resultSelector As Expression(Of Func(Of TSource, TCollection, TResult))
) As IMongoQueryable(Of TResult)
[<ExtensionAttribute>]
static member SelectMany :
source : IMongoQueryable<'TSource> *
collectionSelector : Expression<Func<'TSource, IEnumerable<'TCollection>>> *
resultSelector : Expression<Func<'TSource, 'TCollection, 'TResult>> -> IMongoQueryable<'TResult>
Parameters
- source
- Type: MongoDB.Driver.LinqIMongoQueryableTSource
A sequence of values to project. - collectionSelector
- Type: System.Linq.ExpressionsExpressionFuncTSource, IEnumerableTCollection
A projection function to apply to each element of the input sequence. - resultSelector
- Type: System.Linq.ExpressionsExpressionFuncTSource, TCollection, TResult
A projection function to apply to each element of each intermediate sequence.
Type Parameters
- TSource
- The type of the elements of source.
- TCollection
- The type of the intermediate elements collected by the function represented by collectionSelector.
- TResult
- The type of the elements of the resulting sequence.
Return Value
Type:
IMongoQueryableTResult
An
IMongoQueryableT whose elements are the result of invoking the one-to-many projection function
collectionSelector on each element of
source and then mapping each of those sequence elements and their corresponding
source element to a result element.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type
IMongoQueryableTSource. 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