Qbservable.SelectMany<TSource, TResult> Method (IQbservable<TSource>, Expression<Func<TSource, IEnumerable<TResult>>>)
Projects each element of a queryable observable sequence to a queryable observable sequence and flattens the resulting queryable observable sequences into one queryable observable sequence.
Namespace: System.Reactive.Linq
Assembly: System.Reactive.Providers (in System.Reactive.Providers.dll)
Syntax
'Declaration
<ExtensionAttribute> _
Public Shared Function SelectMany(Of TSource, TResult) ( _
source As IQbservable(Of TSource), _
selector As Expression(Of Func(Of TSource, IEnumerable(Of TResult))) _
) As IQbservable(Of TResult)
'Usage
Dim source As IQbservable(Of TSource)
Dim selector As Expression(Of Func(Of TSource, IEnumerable(Of TResult)))
Dim returnValue As IQbservable(Of TResult)
returnValue = source.SelectMany(selector)
public static IQbservable<TResult> SelectMany<TSource, TResult>(
this IQbservable<TSource> source,
Expression<Func<TSource, IEnumerable<TResult>>> selector
)
[ExtensionAttribute]
public:
generic<typename TSource, typename TResult>
static IQbservable<TResult>^ SelectMany(
IQbservable<TSource>^ source,
Expression<Func<TSource, IEnumerable<TResult>^>^>^ selector
)
static member SelectMany :
source:IQbservable<'TSource> *
selector:Expression<Func<'TSource, IEnumerable<'TResult>>> -> IQbservable<'TResult>
JScript does not support generic types and methods.
Type Parameters
- TSource
The type of source.
- TResult
The type of result.
Parameters
- source
Type: System.Reactive.Linq.IQbservable<TSource>
A queryable observable sequence of elements to project.
- selector
Type: System.Linq.Expressions.Expression<Func<TSource, IEnumerable<TResult>>>
A transform function to apply to each element.
Return Value
Type: System.Reactive.Linq.IQbservable<TResult>
A queryable observable sequence whose elements are the result of invoking the one-to-many transform function on each element of the input sequence.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type IQbservable<TSource>. When you use instance method syntax to call this method, omit the first parameter. For more information, see or .