| QueryableExDoTSource Method (IQueryableTSource, ExpressionActionTSource, ExpressionActionException, ExpressionAction) |
Lazily invokes an action for each value in the sequence, and executes an action upon successful or exceptional termination.
Namespace: System.Linq
Assembly: System.Interactive.Providers (in System.Interactive.Providers.dll) Version: 1.2.0.0
SyntaxC#
public static IQueryable<TSource> Do<TSource>( this IQueryable<TSource> source, Expression<Action<TSource>> onNext, Expression<Action<Exception>> onError, Expression<Action> onCompleted )
Parameters
- source
- Type: System.LinqIQueryableTSource
Source sequence. - onNext
- Type: System.Linq.ExpressionsExpressionActionTSource
Action to invoke for each element. - onError
- Type: System.Linq.ExpressionsExpressionActionException
Action to invoke on exceptional termination of the sequence. - onCompleted
- Type: System.Linq.ExpressionsExpressionAction
Action to invoke on successful termination of the sequence.
Type Parameters
- TSource
- Source sequence element type.
Return Value
Type: IQueryableTSourceSequence exhibiting the specified side-effects upon enumeration.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type IQueryableTSource. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).See Also