Question

我尝试使用存储库和unitOfWork

编辑用户

这是我的GenericRepository：

public class GenericRepository<TEntity> where TEntity : class
{
    internal LolaBikeContext context;
    internal DbSet<TEntity> dbSet;

    public GenericRepository(LolaBikeContext context)
    {
        this.context = context;
        this.dbSet = context.Set<TEntity>();
    }

    public virtual IEnumerable<TEntity> GetWithRawSql(string query, params object[] parameters)
    {
        return dbSet.SqlQuery(query, parameters).ToList();
    }

    public virtual IEnumerable<TEntity> Get(
            Expression<Func<TEntity, bool>> filter = null,
            Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>> orderBy = null,
            string includeProperties = "")
    {
        IQueryable<TEntity> query = dbSet;

        if (filter != null)
        {
            query = query.Where(filter);
        }

        foreach (var includeProperty in includeProperties.Split
                (new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries))
        {
            query = query.Include(includeProperty);
        }

        if (orderBy != null)
        {
            return orderBy(query).ToList();
        }
        else
        {
            return query.ToList();
        }
    }

    public virtual TEntity GetByID(object id)
    {
        return dbSet.Find(id);
    }

    public virtual void Insert(TEntity entity)
    {
        dbSet.Add(entity);
    }

    public virtual void Delete(object id)
    {
        TEntity entityToDelete = dbSet.Find(id);
        Delete(entityToDelete);
    }

    public virtual void Delete(TEntity entityToDelete)
    {
        if (context.Entry(entityToDelete).State == EntityState.Detached)
        {
            dbSet.Attach(entityToDelete);
        }
        dbSet.Remove(entityToDelete);
    }

    public virtual void Update(TEntity entityToUpdate)
    {
        dbSet.Attach(entityToUpdate);
        context.Entry(entityToUpdate).State = EntityState.Modified;
    }
}

这是我的UnitOfWOrk：

public class UnitOfWork : IDisposable
{
    private LolaBikeContext context = new LolaBikeContext ();
    private GenericRepository<UserProfile> userRepository;        

    public GenericRepository<UserProfile> UserRepository
    {
        get
        {
            if (this.userRepository == null)
            {
                this.userRepository = new GenericRepository<UserProfile>(context);
            }
            return userRepository;
        }
    }     


    public void Save()
    {
        context.SaveChanges();
    }

    private bool disposed = false;

    protected virtual void Dispose(bool disposing)
    {
        if (!this.disposed)
        {
            if (disposing)
            {
                context.Dispose();
            }
        }
        this.disposed = true;
    }

    public void Dispose()
    {
        Dispose(true);
        GC.SuppressFinalize(this);
    }
}

现在我想编辑一个用户，我现在有这样的方法：

[HttpPost]
public ActionResult Edit([Bind(Include="FirstName, LastName")]UserProfile userprofile)
{
    try
    {
        if (ModelState.IsValid)
        {
            string username = User.Identity.Name;
            // Get the userprofile
            //UserProfile user = unitOfWork.UserRepository.Get()   //db.userProfiles.FirstOrDefault(u => u.UserName.Equals(username));
            unitOfWork.UserRepository.Update(userprofile);
            unitOfWork.UserRepository.Insert(userprofile);
            //user.FirstName = userprofile.FirstName;
            //user.LastName = userprofile.LastName;
            //user.Email = userprofile.Email;
            //user.Motto = userprofile.Motto;
            //user.PlaceOfBirth = userprofile.PlaceOfBirth;
            //user.HowManyBikes = userprofile.HowManyBikes;
            //user.BesideYourBeth = userprofile.BesideYourBeth;
            //user.NicestRide = userprofile.NicestRide;
            //user.WorstRide = userprofile.WorstRide;
            //user.AmountKmPerYear = userprofile.AmountKmPerYear;
            //user.AverageSpeed = userprofile.AverageSpeed;
            //user.AbleToChatWhileRiding = userprofile.AbleToChatWhileRiding;
            //user.PhoneNumber = userprofile.PhoneNumber;
            //db.Entry(user).State = EntityState.Modified;
            db.SaveChanges();
            return RedirectToAction("Edit", "Account");
        }
    }
    catch (DataException)
    {
        ModelState.AddModelError(string.Empty, "Unable to save changes");
    }

    return View(userprofile);
}

但没有什么会改变。

谢谢

但如果我尝试

 [HttpPost]
        public ActionResult Edit(UserProfile userprofile)
        {
            if (ModelState.IsValid)
            {
                string username = User.Identity.Name;
                // Get the userprofile
               // UserProfile user = db.userProfiles.FirstOrDefault(u => u.UserName.Equals(username));
                unitOfWork.UserRepository.Update(userprofile);
                unitOfWork.UserRepository.Insert(userprofile);

                //user.FirstName = userprofile.FirstName;

                unitOfWork.Save();
                //db.SaveChanges();
                return RedirectToAction("Edit", "Account");
            }

            return View(userprofile);
        }

我收到此错误：

{"Violation of UNIQUE KEY constraint 'UQ__UserProf__C9F28456B1DA0D25'. Cannot insert duplicate key in object 'dbo.UserProfile'. The duplicate key value is (savant).\r\nThe statement has been terminated."}

但是只有一个名为savant的用户名

Answer 1

当你写这个：[Bind(Include="FirstName, LastName")]UserProfile userprofile时，这意味着你的userprofile只接受这两个值，你没有ID，所以当你进行Update方法调用时，dbSet.Attach(entityToUpdate);无法附加实体哪个没有ID。您还必须从前端转发ID参数...或者您可以通过其他方式获取ID，但重点是没有ID设置的元素无法附加。

UNitofWork，编辑方法

1 个答案: