Export (0) Print
Expand All

Observable.ToDictionary(Of TSource, TKey) Method (IObservable(Of TSource), Func(Of TSource, TKey))

Creates a dictionary from an observable sequence according to a specified key selector function.

Namespace:  System.Reactive.Linq
Assembly:  System.Reactive (in System.Reactive.dll)

'Declaration
<ExtensionAttribute> _
Public Shared Function ToDictionary(Of TSource, TKey) ( _
	source As IObservable(Of TSource), _
	keySelector As Func(Of TSource, TKey) _
) As IObservable(Of IDictionary(Of TKey, TSource))
'Usage
Dim source As IObservable(Of TSource)
Dim keySelector As Func(Of TSource, TKey)
Dim returnValue As IObservable(Of IDictionary(Of TKey, TSource))

returnValue = source.ToDictionary(keySelector)

Type Parameters

TSource

The type of source.

TKey

The type of key.

Parameters

source
Type: System.IObservable(Of TSource)
An observable sequence to create a dictionary for.
keySelector
Type: System.Func(Of TSource, TKey)
A function to extract a key from each element.

Return Value

Type: System.IObservable(Of IDictionary(Of TKey, TSource))
The dictionary from an observable sequence according to a specified key selector function.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IObservable(Of TSource). When you use instance method syntax to call this method, omit the first parameter. For more information, see http://msdn.microsoft.com/en-us/library/bb384936(v=vs.103).aspx or http://msdn.microsoft.com/en-us/library/bb383977(v=vs.103).aspx.
Show:
© 2014 Microsoft