Observable.Catch<TSource> Method (IObservable<TSource>, IObservable<TSource>)

Continues an observable sequence that is terminated by an exception with the next observable sequence.

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

Syntax

'Declaration
<ExtensionAttribute> _
Public Shared Function Catch(Of TSource) ( _
    first As IObservable(Of TSource), _
    second As IObservable(Of TSource) _
) As IObservable(Of TSource)

'Usage
Dim first As IObservable(Of TSource)
Dim second As IObservable(Of TSource)
Dim returnValue As IObservable(Of TSource)

returnValue = first.Catch(second)

public static IObservable<TSource> Catch<TSource>(
    this IObservable<TSource> first,
    IObservable<TSource> second
)

[ExtensionAttribute]
public:
generic<typename TSource>
static IObservable<TSource>^ Catch(
    IObservable<TSource>^ first, 
    IObservable<TSource>^ second
)

static member Catch : 
        first:IObservable<'TSource> * 
        second:IObservable<'TSource> -> IObservable<'TSource> 

JScript does not support generic types and methods.

Type Parameters

• TSource
  The type of source.

Parameters

• first
  Type: System.IObservable<TSource>
  First observable sequence whose exception (if any) is caught.

• second
  Type: System.IObservable<TSource>
  The second observable sequence used to produce results when an error occurred in the first sequence.

Return Value

Type: System.IObservable<TSource>
An observable sequence containing the first sequence's elements, followed by the elements of the second sequence in case an exception occurred.

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 or .

See Also

Reference

Observable Class

Catch Overload

System.Reactive.Linq Namespace