SelectMany<TSource,TCollection,TResult>(IIndexedSource<TSource>,Expression<Func<TSource,IEnumerable<TCollection>>>,Expression<Func<TSource,TCollection,TResult>>) Method

Projects each element of a collection to a sequence of collections, flattens the resulting collections into one collection, and invokes a result selector function on each element therein.

Syntax

Visual Basic
C#

'Declaration
 
Public Overloads Shared Function SelectMany
    (Of TSource,TCollection,TResult)( _
   ByVal source As IIndexedSource(Of TSource), _
   ByVal collectionSelector As System.Linq.Expressions.Expression(Of Func(Of TSource,IEnumerable(Of TCollection))), _
   ByVal resultSelector As System.Linq.Expressions.Expression(Of Func(Of TSource,TCollection,TResult)) _
) As IIndexedSource(Of TResult)

public static IIndexedSource<TResult> SelectMany<TSource,TCollection,TResult>( 
   IIndexedSource<TSource> source,
   System.Linq.Expressions.Expression<Func<TSource,IEnumerable<TCollection>>> collectionSelector,
   System.Linq.Expressions.Expression<Func<TSource,TCollection,TResult>> resultSelector
)

Parameters

source: A collection of values to project.
collectionSelector: A transform function to apply to each element of the input collection.
resultSelector: A transform function to apply to each element of the intermediate sequence.

Type Parameters

TSource: The type of the elements of source.
TCollection: The type of the intermediate elements collected by collectionSelector.
TResult: The type of the elements of the resulting collection.

Return Value

An IIndexedSource<TResult> whose elements are the result of invoking the one-to-many transform function collectionSelector on each element of source and then mapping each of those sequence elements and their corresponding source element to a result element.

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

IndexedQueryExtensions Class
IndexedQueryExtensions Members
Overload List