C# mvc4密钥错误已添加具有相同密钥的项 已添加具有相同密钥的项。

这就是我在尝试提交时遇到的错误，我知道这是因为我在workhoursmodel中有两行名称相同，但是我如何修复它-有没有简单的方法修复它，或者我必须分解表并重新创建它

ps我对mvc真的很陌生，所以一点帮助会很好

我的控制器

   public ActionResult Create()
    {
        WorkhoursModels model = new WorkhoursModels();
        model.Workstations = db.WorkStation.AsEnumerable().Select(x => new SelectListItem() { Text = x.WorkStations, Value = x.Id.ToString() });
        return View(model);
    }


    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create(WorkhoursModels workhoursmodels)
    {
        db.WorkHours.Add(workhoursmodels);
        db.SaveChanges();
        return View();
    }

{

我的模型

{
    [Table("WorkHoursModels")]
    public class WorkhoursModels
    {
        public int Id { get; set; }
        public string Start { get; set; }
        public string Stop { get; set; }
        public string command { get; set; }
        public string Users { get; set; }
        public IEnumerable<System.Web.Mvc.SelectListItem> Workstations { get; set; }
        public string WorkStations { set; get; }
    }
        [Table("WorkStations")]
        public class WorkHoursStation
        {
            public int Id { get; set; }
            public string WorkStations { get; set; }
            public IEnumerable<SelectListItem> Workstation { get; set; }
        }



        public class WorkhourDB : DbContext 
        {
            public DbSet<WorkhoursModels> WorkHours { get; set; }
            public DbSet<WorkHoursStation> WorkStation { get; set; }
        }
    }

---

数据库中已有一个键，如果该键在数据库中看起来正常，则更新该记录，否则添加。参见示例

处理添加和更新案例

Handle both the add and update cases

public void Persist(Company company)
{
  var companyInDb = _dbSet.SingleOrDefault(c => c.Id == company.Id);
  if (companyInDb != null)
  {
     _context.Entry(companyInDb).CurrentValues.SetValues(company);
  }
  else
  {
    _dbSet.Add(company);
  }
    _context.SaveChanges();
}

---

我设法找到了一个解决办法

我将此添加到我的工时模型中

 public virtual WorkStation WorkStation { get; set; } 

然后我把它添加到我的工作站模型中

public virtual ICollection<Workhourmodels> Workhourmodels{ get; set; }

---

是否在要添加到的表上设置了自动增量键？否-仅通过将自动增量添加到工作站？IEnumerable无法写入数据库。它必须是某个类名。如果您的WorkHours表在主键列上的Identity specification属性设置为Yes，请在数据库中进行检查。Alexey Aza我提供了数据库信息，当您查找现有键并保存更改时会发生什么情况，会发生什么错误？

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create(WorkhoursModels workhoursmodels)//object workhoursmodels object has some connection with 
{
    db.WorkHours.Add(workhoursmodels);
    db.SaveChanges();
    return View();
}
//try to create a new object workhoursmodel and get all information you need from the object post from view
//eg:
WorkHours workHours = new WorkHours();
workHours.Users = workhoursmodels.Users

 public virtual WorkStation WorkStation { get; set; } 

public virtual ICollection<Workhourmodels> Workhourmodels{ get; set; }

    ViewBag.WorkStation = new SelectList(db.WorkStation, "Id", "WorkStation");
    return View();