Qbservable.Using<TSource, TResource> Method
Constructs a queryable observable sequence that depends on a resource object.
Namespace: System.Reactive.Linq
Assembly: System.Reactive.Providers (in System.Reactive.Providers.dll)
Syntax
'Declaration
<ExtensionAttribute> _
Public Shared Function Using(Of TSource, TResource) ( _
provider As IQbservableProvider, _
resourceFactory As Expression(Of Func(Of TResource)), _
observableFactory As Expression(Of Func(Of TResource, IObservable(Of TSource))) _
) As IQbservable(Of TSource)
'Usage
Dim provider As IQbservableProvider
Dim resourceFactory As Expression(Of Func(Of TResource))
Dim observableFactory As Expression(Of Func(Of TResource, IObservable(Of TSource)))
Dim returnValue As IQbservable(Of TSource)
returnValue = provider.Using(resourceFactory, _
observableFactory)
public static IQbservable<TSource> Using<TSource, TResource>(
this IQbservableProvider provider,
Expression<Func<TResource>> resourceFactory,
Expression<Func<TResource, IObservable<TSource>>> observableFactory
)
[ExtensionAttribute]
public:
generic<typename TSource, typename TResource>
static IQbservable<TSource>^ Using(
IQbservableProvider^ provider,
Expression<Func<TResource>^>^ resourceFactory,
Expression<Func<TResource, IObservable<TSource>^>^>^ observableFactory
)
static member Using :
provider:IQbservableProvider *
resourceFactory:Expression<Func<'TResource>> *
observableFactory:Expression<Func<'TResource, IObservable<'TSource>>> -> IQbservable<'TSource>
JScript does not support generic types and methods.
Type Parameters
- TSource
The type of source.
- TResource
The type of resource.
Parameters
- provider
Type: System.Reactive.Linq.IQbservableProvider
The local Qbservable provider.
- resourceFactory
Type: System.Linq.Expressions.Expression<Func<TResource>>
The factory functions to obtain a resource object.
- observableFactory
Type: System.Linq.Expressions.Expression<Func<TResource, IObservable<TSource>>>
The factory function to obtain a queryable observable sequence that depends on the obtained resource.
Return Value
Type: System.Reactive.Linq.IQbservable<TSource>
The queryable observable sequence whose lifetime controls the lifetime of the dependent resource object.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type IQbservableProvider. When you use instance method syntax to call this method, omit the first parameter. For more information, see or .