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Observable.ToDictionary(TSource, TKey, TElement) Method (IObservable(TSource), Func(TSource, TKey), Func(TSource, TElement), IEqualityComparer(TKey))

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

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

JScript does not support generic types and methods.

Type Parameters

TSource

The type of source.

TKey

The type of key.

TElement

The type of element.

Parameters

source
Type: System.IObservable(TSource)
An observable sequence to create a dictionary for.
keySelector
Type: System.Func(TSource, TKey)
A function to extract a key from each element.
elementSelector
Type: System.Func(TSource, TElement)
A transform function to produce a result element value from each element.
comparer
Type: System.Collections.Generic.IEqualityComparer(TKey)
An equality comparer to compare keys.

Return Value

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