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Qbservable.ToDictionary(Of TSource, TKey, TElement) Method (IQbservable(Of TSource), Expression(Of Func(Of TSource, TKey)), Expression(Of Func(Of TSource, TElement)))

Creates a dictionary from a queryable observable sequence according to a specified key selector function, and an element selector function.

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

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

returnValue = source.ToDictionary(keySelector, _
	elementSelector)

Type Parameters

TSource

The type of source.

TKey

The type of key.

TElement

The type of element.

Parameters

source
Type: System.Reactive.Linq.IQbservable(Of TSource)
A queryable observable sequence to create a dictionary for.
keySelector
Type: System.Linq.Expressions.Expression(Of Func(Of TSource, TKey))
A function to extract a key from each element.
elementSelector
Type: System.Linq.Expressions.Expression(Of Func(Of TSource, TElement))
A transform function to produce a result element value from each element.

Return Value

Type: System.Reactive.Linq.IQbservable(Of IDictionary(Of TKey, TElement))
A dictionary from a queryable observable sequence according to a specified key selector function, and an element selector function.

Usage Note

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