)} ,System.Reactive.Concurrency.IScheduler)} })} },System.Reactive.Concurrency.IScheduler)}

Qbservable.Start(IQbservableProvider, Expression) method¶

Defined in

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

Applies to

netstandard2.0

Overloads¶

1. public static IQbservable<Unit> Start(this IQbservableProvider provider, Expression<Action> action)
2. public static IQbservable<Unit> Start(this IQbservableProvider provider, Expression<Action> action, IScheduler scheduler)
3. public static IQbservable<TResult> Start<TResult>(this IQbservableProvider provider, Expression<Func<TResult>> function)
4. public static IQbservable<TResult> Start<TResult>(this IQbservableProvider provider, Expression<Func<TResult>> function, IScheduler scheduler)

1. Overload¶

public static IQbservable<Unit> Start(this IQbservableProvider provider, Expression<Action> action)

Summary: Invokes the action asynchronously, surfacing the result through an observable sequence.

Parameters

Name	Type	Description
`provider`	[IQbservableProvider](#	Query provider used to construct the [IQbservable](# data source.
`action`	Expression	Action to run asynchronously.

Returns: IQbservable -- An observable sequence exposing a Unit value upon completion of the action, or an exception.

Remarks

-

The action is called immediately, not during the subscription of the resulting sequence.

-

Multiple subscriptions to the resulting sequence can observe the action's outcome.

Exceptions

Type	Condition
System.ArgumentNullException	`action` is null.

2. Overload¶

public static IQbservable<Unit> Start(this IQbservableProvider provider, Expression<Action> action, IScheduler scheduler)

Summary: Invokes the action asynchronously on the specified scheduler, surfacing the result through an observable sequence.

Parameters

Name	Type	Description
`provider`	[IQbservableProvider](#	Query provider used to construct the [IQbservable](# data source.
`action`	Expression	Action to run asynchronously.
`scheduler`	[IScheduler](#	Scheduler to run the action on.

Returns: IQbservable -- An observable sequence exposing a Unit value upon completion of the action, or an exception.

Remarks

-

The action is called immediately, not during the subscription of the resulting sequence.

-

Multiple subscriptions to the resulting sequence can observe the action's outcome.

Exceptions

Type	Condition
System.ArgumentNullException	`action` or `scheduler` is null.

3. Overload¶

public static IQbservable<TResult> Start<TResult>(this IQbservableProvider provider, Expression<Func<TResult>> function)

Summary: Invokes the specified function asynchronously, surfacing the result through an observable sequence.

Type parameters

Name	Description
`TResult`	The type of the result returned by the function.

Parameters

Name	Type	Description
`provider`	[IQbservableProvider](#	Query provider used to construct the [IQbservable](# data source.
`function`	Expression>	Function to run asynchronously.

Returns: IQbservable -- An observable sequence exposing the function's result value, or an exception.

Remarks

-

The function is called immediately, not during the subscription of the resulting sequence.

-

Multiple subscriptions to the resulting sequence can observe the function's result.

Exceptions

Type	Condition
System.ArgumentNullException	`function` is null.

4. Overload¶

public static IQbservable<TResult> Start<TResult>(this IQbservableProvider provider, Expression<Func<TResult>> function, IScheduler scheduler)

Summary: Invokes the specified function asynchronously on the specified scheduler, surfacing the result through an observable sequence

Type parameters

Name	Description
`TResult`	The type of the result returned by the function.

Parameters

Name	Type	Description
`provider`	[IQbservableProvider](#	Query provider used to construct the [IQbservable](# data source.
`function`	Expression>	Function to run asynchronously.
`scheduler`	[IScheduler](#	Scheduler to run the function on.

Returns: IQbservable -- An observable sequence exposing the function's result value, or an exception.

Remarks

-

The function is called immediately, not during the subscription of the resulting sequence.

-

Multiple subscriptions to the resulting sequence can observe the function's result.

Exceptions

Type	Condition
System.ArgumentNullException	`function` or `scheduler` is null.