Sequence.SelectMany(TSource, TCollection, TResult) Method (ISequence(TSource), Func(TSource, Int32, IEnumerable(TCollection)), Func(TSource, TCollection, TResult))

Sequence SelectMany TSource, TCollection, TResult Method (ISequence TSource , Func TSource, Int32, IEnumerable TCollection , Func TSource, TCollection, TResult )

A Sandcastle Documented Class Library

Projects each element of a sequence to an IEnumerable T , flattens the resulting enumerables into one sequence, and invokes a result selector function on each element therein. The index of each source element is used in the intermediate projected form of that element.

Namespace: Sequences
Assembly: Sequences (in Sequences.dll) Version: 1.0.1.0 (1.0.1)

Syntax

C++

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public static ISequence<TResult> SelectMany<TSource, TCollection, TResult>(
	this ISequence<TSource> source,
	Func<TSource, int, IEnumerable<TCollection>> collectionSelector,
	Func<TSource, TCollection, TResult> resultSelector
)

public static ISequence<TResult> SelectMany<TSource, TCollection, TResult>(
	this ISequence<TSource> source,
	Func<TSource, int, IEnumerable<TCollection>> collectionSelector,
	Func<TSource, TCollection, TResult> resultSelector
)

<ExtensionAttribute> 
Public Shared Function SelectMany(Of TSource, TCollection, TResult) ( 
	source As ISequence(Of TSource),
	collectionSelector As Func(Of TSource, Integer, IEnumerable(Of TCollection)),
	resultSelector As Func(Of TSource, TCollection, TResult)
) As ISequence(Of TResult)

<ExtensionAttribute> 
Public Shared Function SelectMany(Of TSource, TCollection, TResult) ( 
	source As ISequence(Of TSource),
	collectionSelector As Func(Of TSource, Integer, IEnumerable(Of TCollection)),
	resultSelector As Func(Of TSource, TCollection, TResult)
) As ISequence(Of TResult)

public:
[ExtensionAttribute]
generic<typename TSource, typename TCollection, typename TResult>
static ISequence<TResult>^ SelectMany(
	ISequence<TSource>^ source, 
	Func<TSource, int, IEnumerable<TCollection>^>^ collectionSelector, 
	Func<TSource, TCollection, TResult>^ resultSelector
)

public:
[ExtensionAttribute]
generic<typename TSource, typename TCollection, typename TResult>
static ISequence<TResult>^ SelectMany(
	ISequence<TSource>^ source, 
	Func<TSource, int, IEnumerable<TCollection>^>^ collectionSelector, 
	Func<TSource, TCollection, TResult>^ resultSelector
)

static member SelectMany : 
        source : ISequence<'TSource> * 
        collectionSelector : Func<'TSource, int, IEnumerable<'TCollection>> * 
        resultSelector : Func<'TSource, 'TCollection, 'TResult> -> ISequence<'TResult>

static member SelectMany : 
        source : ISequence<'TSource> * 
        collectionSelector : Func<'TSource, int, IEnumerable<'TCollection>> * 
        resultSelector : Func<'TSource, 'TCollection, 'TResult> -> ISequence<'TResult>

Parameters

source: Type: Sequences ISequence TSource
A sequence of values to project.

collectionSelector: Type: System Func TSource, Int32, IEnumerable TCollection
A transform function to apply to each source element; the second parameter of the function represents the index of the source element.

resultSelector: Type: System Func TSource, TCollection, TResult
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 sequence.

Return Value

Type: ISequence TResult
A sequence 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.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type ISequence TSource . 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).

Reference

Sequence Class

SelectMany Overload

Sequences Namespace