Qbservable.ToDictionary<TSource, TKey> Method (IQbservable<TSource>, Expression<Func<TSource, TKey>>)
Creates a dictionary from a queryable observable sequence according to a specified key selector function.
Namespace: System.Reactive.Linq
Assembly: System.Reactive.Providers (in System.Reactive.Providers.dll)
Syntax
'Declaration
<ExtensionAttribute> _
Public Shared Function ToDictionary(Of TSource, TKey) ( _
source As IQbservable(Of TSource), _
keySelector As Expression(Of Func(Of TSource, TKey)) _
) As IQbservable(Of IDictionary(Of TKey, TSource))
'Usage
Dim source As IQbservable(Of TSource)
Dim keySelector As Expression(Of Func(Of TSource, TKey))
Dim returnValue As IQbservable(Of IDictionary(Of TKey, TSource))
returnValue = source.ToDictionary(keySelector)
public static IQbservable<IDictionary<TKey, TSource>> ToDictionary<TSource, TKey>(
this IQbservable<TSource> source,
Expression<Func<TSource, TKey>> keySelector
)
[ExtensionAttribute]
public:
generic<typename TSource, typename TKey>
static IQbservable<IDictionary<TKey, TSource>^>^ ToDictionary(
IQbservable<TSource>^ source,
Expression<Func<TSource, TKey>^>^ keySelector
)
static member ToDictionary :
source:IQbservable<'TSource> *
keySelector:Expression<Func<'TSource, 'TKey>> -> IQbservable<IDictionary<'TKey, 'TSource>>
JScript does not support generic types and methods.
Type Parameters
- TSource
The type of source.
- TKey
The type of key.
Parameters
- source
Type: System.Reactive.Linq.IQbservable<TSource>
A queryable observable sequence to create a dictionary for.
- keySelector
Type: System.Linq.Expressions.Expression<Func<TSource, TKey>>
A function to extract a key from each element.
Return Value
Type: System.Reactive.Linq.IQbservable<IDictionary<TKey, TSource>>
A dictionary from a queryable 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 IQbservable<TSource>. When you use instance method syntax to call this method, omit the first parameter. For more information, see or .