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Implementing the Repository Pattern with LINQ-to-SQL

, 4 Jun 2008 CPOL
The purpose of this article is to describe the technique I have used to implement the Repository pattern in .NET applications.
linqrepository.zip
LinqRepository
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

public class ApplicationService
{
    private IRepository<Shape> _genericShapeRepository;
    private IShapeRepository _specializedShapeRepository;

    public ApplicationService(IRepository<Shape> genericShapeRepository, IShapeRepository specializedShapeRepository)
    {
        _genericShapeRepository = genericShapeRepository;
        _specializedShapeRepository = specializedShapeRepository;
    }

    public void DoSomethingWithTheGenericRepository()
    {
        IList<Shape> threeSidedShapes = _genericShapeRepository.FindAll(shape => shape.NumberOfSides == 3).ToList();

        _genericShapeRepository.MarkForDeletion(threeSidedShapes[0]);
        _genericShapeRepository.SaveAll();
    }

    public void DoSomethingWithTheSpecializedRepository()
    {
        IList<Shape> threeSidedShapes = _specializedShapeRepository.RetrieveByNumberOfSides(3).ToList();

        _specializedShapeRepository.MarkForDeletion(threeSidedShapes[0]);
        _specializedShapeRepository.SaveAll();
    }

}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

liammclennan
Web Developer
Australia Australia
Liam McLennan has been developing for the internet since 2001. He is passionate about delivering top quality I.T. solutions that address his customer's needs.

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