| QueryableExUsingTSource, TResource Method (IQueryProvider, ExpressionFuncTResource, ExpressionFuncTResource, IEnumerableTSource) |
Generates a sequence that's dependent on a resource object whose lifetime is determined by the sequence usage duration.
Namespace: System.Linq
Assembly: System.Interactive.Providers (in System.Interactive.Providers.dll) Version: 1.2.0.0
SyntaxC#
public static IQueryable<TSource> Using<TSource, TResource>( this IQueryProvider provider, Expression<Func<TResource>> resourceFactory, Expression<Func<TResource, IEnumerable<TSource>>> enumerableFactory ) where TResource : IDisposable
Parameters
- provider
- Type: System.LinqIQueryProvider
Query provider. - resourceFactory
- Type: System.Linq.ExpressionsExpressionFuncTResource
Resource factory function. - enumerableFactory
- Type: System.Linq.ExpressionsExpressionFuncTResource, IEnumerableTSource
Enumerable factory function, having access to the obtained resource.
Type Parameters
- TSource
- Source element type.
- TResource
- Resource type.
Return Value
Type: IQueryableTSourceSequence whose use controls the lifetime of the associated obtained resource.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type IQueryProvider. 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