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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
_ReSharper.LinqRepository
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using System;
using System.Collections.Generic;
using System.Text;


public interface IRepository<T> where T : class
{
    /// <summary>
    /// Return all instances of type T.
    /// </summary>
    /// <returns></returns>
    IEnumerable<T> All();

    /// <summary>
    /// Return all instances of type T that match the expression exp.
    /// </summary>
    /// <param name="exp"></param>
    /// <returns></returns>
    IEnumerable<T> FindAll(Func<T, bool> exp);

    /// <summary>Returns the single entity matching the expression. Throws an exception if there is not exactly one such entity.</summary>
    /// <param name="exp"></param><returns></returns>
    T Single(Func<T, bool> exp);

    /// <summary>Returns the first element satisfying the condition.</summary>
    /// <param name="exp"></param><returns></returns>
    T First(Func<T, bool> exp);

    /// <summary>
    /// Mark an entity to be deleted when the context is saved.
    /// </summary>
    /// <param name="entity"></param>
    void MarkForDeletion(T entity);

    /// <summary>
    /// Create a new instance of type T.
    /// </summary>
    /// <returns></returns>
    T CreateInstance();

    /// <summary>Persist the data context.</summary>
    void 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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