},System.Collections.Generic.IDictionary{--0,System.IObservable{--1}})} },System.Collections.Generic.IDictionary{--0,System.IObservable{--1}},System.IObservable{--1})} },System.Collections.Generic.IDictionary{--0,System.IObservable{--1}},System.Reactive.Concurrency.IScheduler)}

) method¶

Defined in

Type: Qbservable Namespace: System.Reactive.Linq Assembly: System.Reactive.dll

Applies to

netstandard2.0

Overloads¶

1. public static IQbservable<TResult> Case<TValue, TResult>(this IQbservableProvider provider, Expression<Func<TValue>> selector, IDictionary<TValue, IObservable<TResult>> sources) where TValue : notnull
2. public static IQbservable<TResult> Case<TValue, TResult>(this IQbservableProvider provider, Expression<Func<TValue>> selector, IDictionary<TValue, IObservable<TResult>> sources, IObservable<TResult> defaultSource) where TValue : notnull
3. public static IQbservable<TResult> Case<TValue, TResult>(this IQbservableProvider provider, Expression<Func<TValue>> selector, IDictionary<TValue, IObservable<TResult>> sources, IScheduler scheduler) where TValue : notnull

1. Overload¶

public static IQbservable<TResult> Case<TValue, TResult>(this IQbservableProvider provider, Expression<Func<TValue>> selector, IDictionary<TValue, IObservable<TResult>> sources) where TValue : notnull

Summary: Uses selector to determine which source in sources to return, choosing an empty sequence if no match is found.

Type parameters

Name	Description
`TValue`	The type of the value returned by the selector function, used to look up the resulting source.
`TResult`	The type of the elements in the result sequence.

Parameters

Name	Type	Description
`provider`	[IQbservableProvider](#	Query provider used to construct the [IQbservable](# data source.
`selector`	Expression>	Selector function invoked to determine the source to lookup in the `sources` dictionary.
`sources`	IDictionary>	Dictionary of sources to select from based on the `selector` invocation result.

Returns: IQbservable -- The observable sequence retrieved from the sources dictionary based on the selector invocation result, or an empty sequence if no match is found.

Exceptions

Type	Condition
System.ArgumentNullException	`selector` or `sources` is null.

2. Overload¶

public static IQbservable<TResult> Case<TValue, TResult>(this IQbservableProvider provider, Expression<Func<TValue>> selector, IDictionary<TValue, IObservable<TResult>> sources, IObservable<TResult> defaultSource) where TValue : notnull

Summary: Uses selector to determine which source in sources to return, choosing defaultSource if no match is found.

Type parameters

Name	Description
`TValue`	The type of the value returned by the selector function, used to look up the resulting source.
`TResult`	The type of the elements in the result sequence.

Parameters

Name	Type	Description
`provider`	[IQbservableProvider](#	Query provider used to construct the [IQbservable](# data source.
`selector`	Expression>	Selector function invoked to determine the source to lookup in the `sources` dictionary.
`sources`	IDictionary>	Dictionary of sources to select from based on the `selector` invocation result.
`defaultSource`	IObservable	Default source to select in case no matching source in `sources` is found.

Returns: IQbservable -- The observable sequence retrieved from the sources dictionary based on the selector invocation result, or defaultSource if no match is found.

Exceptions

Type	Condition
System.ArgumentNullException	`selector` or `sources` or `defaultSource` is null.

3. Overload¶

public static IQbservable<TResult> Case<TValue, TResult>(this IQbservableProvider provider, Expression<Func<TValue>> selector, IDictionary<TValue, IObservable<TResult>> sources, IScheduler scheduler) where TValue : notnull

Summary: Uses selector to determine which source in sources to return, choosing an empty sequence on the specified scheduler if no match is found.

Type parameters

Name	Description
`TValue`	The type of the value returned by the selector function, used to look up the resulting source.
`TResult`	The type of the elements in the result sequence.

Parameters

Name	Type	Description
`provider`	[IQbservableProvider](#	Query provider used to construct the [IQbservable](# data source.
`selector`	Expression>	Selector function invoked to determine the source to lookup in the `sources` dictionary.
`sources`	IDictionary>	Dictionary of sources to select from based on the `selector` invocation result.
`scheduler`	[IScheduler](#	Scheduler to generate an empty sequence on in case no matching source in `sources` is found.

Returns: IQbservable -- The observable sequence retrieved from the sources dictionary based on the selector invocation result, or an empty sequence if no match is found.

Exceptions

Type	Condition
System.ArgumentNullException	`selector` or `sources` or `scheduler` is null.