EF Unit Of Work

BaseEntity, 所有的业务表都继承这个类，每个表的主键都是GUID, 主键名Id.

public abstract class BaseEntity{
     public BaseEntity()
     {
          this.Id = Guid.NewGuid();
     }      
     public vritual Guid Id{get;set;}
}

 Student, 例子类

public Student:BaseEntity
{
     public Name {get;set;}   
}

 StudentContext

public class StudentContext : DbContext
{
    public DbSet<Student> Students {get;set;}
}

 IRepository<T> where T :BaseEntity

public IRepository<T> where T :BaseEntity
{
    T GetById(object Id);
    void Insert(T entity);
    void Update(T entity);
    void Delete(T entity);
    IQueryable<T> Table{get;}
// other common operations ...
}

 EFRepository<T>

public class EFRepository<T>:IRepository<T> where T: BaseEntity
{
    DbContext _db;
    public EFRepository(DbContext db)
    {
        _db = db;
    }
    // implement the operations below. GetById, Insert, Update.....
}

 IUnitOfwork

public interface IUnitOfWork
{
    IRepository<Student> StudentRepository {get;set}
    // add other repositories below.

    //commit 
    void Save();

    Task SaveAsync();
}

 UnitOfWork

public class UnitOfWork:IUnitOfWork
{
    DbContext _db;
    public UnitOfWork(
                    DbContext db,
                    IRepository<Student> studentRepository){
     StudentRepository =studentRepository;
     _db =db;      
    }
    public IRepository<Student> StudentRepository {get;set}
    // add other repositories below.

    //commit 
    public void Save()
    {
        _db.SaveChanges();
    }

    public async Task SaveAsync()
    {
        await _db.SaveChangesAsync();
    }
}

 ISudentService, UI 业务操作的接口和实现

public interface IStudentService
{
    void Create(Student stud);
}


public class StudentService:IStudentService
{
    IUnitOfWork _uof;
    public StudentService(IUnitOfWork uof)
    {
        _uof = uof;
    }
    pubilc void Create(Student stud)
    {
        _uof.StudentRepository.Insert(stud);
        _uof.Save();
    }
}        

 http://files.cnblogs.com/files/sgciviolence/RightManager.zip