Qbservable.Do<TSource> Method (IQbservable<TSource>, Expression<Action<TSource>>, Expression<Action<Exception>>)
Invokes an action for each element in the queryable observable sequence and invokes an action upon exceptional termination of the queryable observable sequence.
Namespace: System.Reactive.Linq
Assembly: System.Reactive.Providers (in System.Reactive.Providers.dll)
Syntax
'Declaration
<ExtensionAttribute> _
Public Shared Function Do(Of TSource) ( _
source As IQbservable(Of TSource), _
onNext As Expression(Of Action(Of TSource)), _
onError As Expression(Of Action(Of Exception)) _
) As IQbservable(Of TSource)
'Usage
Dim source As IQbservable(Of TSource)
Dim onNext As Expression(Of Action(Of TSource))
Dim onError As Expression(Of Action(Of Exception))
Dim returnValue As IQbservable(Of TSource)
returnValue = source.Do(onNext, onError)
public static IQbservable<TSource> Do<TSource>(
this IQbservable<TSource> source,
Expression<Action<TSource>> onNext,
Expression<Action<Exception>> onError
)
[ExtensionAttribute]
public:
generic<typename TSource>
static IQbservable<TSource>^ Do(
IQbservable<TSource>^ source,
Expression<Action<TSource>^>^ onNext,
Expression<Action<Exception^>^>^ onError
)
static member Do :
source:IQbservable<'TSource> *
onNext:Expression<Action<'TSource>> *
onError:Expression<Action<Exception>> -> IQbservable<'TSource>
JScript does not support generic types and methods.
Type Parameters
- TSource
The type of source.
Parameters
- source
Type: System.Reactive.Linq.IQbservable<TSource>
The source sequence.
- onNext
Type: System.Linq.Expressions.Expression<Action<TSource>>
The action to invoke for each element in the queryable observable sequence.
- onError
Type: System.Linq.Expressions.Expression<Action<Exception>>
The action to invoke upon exceptional termination of the queryable observable sequence.
Return Value
Type: System.Reactive.Linq.IQbservable<TSource>
The source sequence with the side-effecting behavior applied.
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 .