Qbservable

Qbservable.Where<TSource> Method (IQbservable<TSource>, Expression<Func<TSource, Int32, Boolean>>)

Filters the elements of a queryable observable sequence based on a predicate by incorporating the element's index.

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

Syntax

'Declaration
<ExtensionAttribute> _
Public Shared Function Where(Of TSource) ( _
    source As IQbservable(Of TSource), _
    predicate As Expression(Of Func(Of TSource, Integer, Boolean)) _
) As IQbservable(Of TSource)
'Usage
Dim source As IQbservable(Of TSource)
Dim predicate As Expression(Of Func(Of TSource, Integer, Boolean))
Dim returnValue As IQbservable(Of TSource)

returnValue = source.Where(predicate)
public static IQbservable<TSource> Where<TSource>(
    this IQbservable<TSource> source,
    Expression<Func<TSource, int, bool>> predicate
)
[ExtensionAttribute]
public:
generic<typename TSource>
static IQbservable<TSource>^ Where(
    IQbservable<TSource>^ source, 
    Expression<Func<TSource, int, bool>^>^ predicate
)
static member Where : 
        source:IQbservable<'TSource> * 
        predicate:Expression<Func<'TSource, int, bool>> -> IQbservable<'TSource> 
JScript does not support generic types and methods.

Type Parameters

  • TSource
    The type source.

Parameters

Return Value

Type: System.Reactive.Linq.IQbservable<TSource>
A queryable observable sequence that contains elements from the input sequence that satisfy the condition.

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 .

See Also

Reference

Qbservable Class

Where Overload

System.Reactive.Linq Namespace

Qbservable.Where<TSource> Method (IQbservable<TSource>, Expression<Func<TSource, Boolean>>)

Filters the elements of a queryable observable sequence based on a predicate.

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

Syntax

'Declaration
<ExtensionAttribute> _
Public Shared Function Where(Of TSource) ( _
    source As IQbservable(Of TSource), _
    predicate As Expression(Of Func(Of TSource, Boolean)) _
) As IQbservable(Of TSource)
'Usage
Dim source As IQbservable(Of TSource)
Dim predicate As Expression(Of Func(Of TSource, Boolean))
Dim returnValue As IQbservable(Of TSource)

returnValue = source.Where(predicate)
public static IQbservable<TSource> Where<TSource>(
    this IQbservable<TSource> source,
    Expression<Func<TSource, bool>> predicate
)
[ExtensionAttribute]
public:
generic<typename TSource>
static IQbservable<TSource>^ Where(
    IQbservable<TSource>^ source, 
    Expression<Func<TSource, bool>^>^ predicate
)
static member Where : 
        source:IQbservable<'TSource> * 
        predicate:Expression<Func<'TSource, bool>> -> IQbservable<'TSource> 
JScript does not support generic types and methods.

Type Parameters

  • TSource
    The type source.

Parameters

Return Value

Type: System.Reactive.Linq.IQbservable<TSource>
A queryable observable sequence that contains elements from the input sequence that satisfy the condition.

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 .

See Also

Reference

Qbservable Class

Where Overload

System.Reactive.Linq Namespace