C#Asp.net标识将当前用户添加到模型

我试图在一个简单的模型上创建一个测试。我不知道如何将用户附加到正在提交的模型。我尝试了几种不同的方法，但似乎无法让模型提交

public class StockController : Controller
{
    private ApplicationDbContext db = new ApplicationDbContext();

    public StockController() 
    {

    }

    // GET: Stock
    [Authorize(Roles = "canEdit")]
    public ActionResult Index()
    {
        var currentUserId = User.Identity.GetUserId();
        var userStocks = db.Stocks.Where(p => p.User.Id == currentUserId);
        //var test1 = userStocks.ToList();
        return View(userStocks.ToList());
    }

    // GET: Stock/Details/5
    [Authorize(Roles = "canEdit")]
    public ActionResult Details(int? id)
    {
        if (id == null)
        {
            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
        }
        Stock stock = db.Stocks.Find(id);
        if (stock == null)
        {
            return HttpNotFound();
        }
        return View(stock);
    }

    // GET: Stock/Create
    [Authorize(Roles = "canEdit")]
    public ActionResult Create()
    {
        return View();
    }

    // POST: Stock/Create
    // To protect from overposting attacks, please enable the specific properties you want to bind to, for 
    // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
    [HttpPost]
    [ValidateAntiForgeryToken]
    [Authorize(Roles = "canEdit")]
    public ActionResult Create([Bind(Include = "StockId,Name,Ticker")] Stock stock)
    {
        //var currentUserId = User.Identity.GetUserId();
        if (ModelState.IsValid)
        {
            //var user = Request.GetOwinContext().GetUserManager<ApplicationUserManager>();
           // var user = db.Users.Select(p => p.UserName == User.Identity.GetUserName()).FirstOrDefault();
            stock.User = user;
            db.Stocks.Add(stock);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

        return View(stock);
    }

以及应用程序用户模型

 public class ApplicationUser : IdentityUser
{
    public virtual ICollection<Stock> Stocks { get; set; }
    public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager)
    {
        // Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
        var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
        // Add custom user claims here
        return userIdentity;
    }

}

公共类应用程序用户：IdentityUser
{
公共虚拟ICollection存储{get；set；}
公共异步任务GenerateUserIdentityAsync（用户管理器）
{
//注意authenticationType必须与CookieAuthenticationOptions.authenticationType中定义的类型匹配
var userIdentity=wait manager.CreateIdentityAsync（这是DefaultAuthenticationTypes.ApplicationOkie）；
//在此处添加自定义用户声明
返回用户身份；
}
}

用户管理器使用的对象实例与控制器不同。因此EF无法正确跟踪用户对象。要解决此问题，只需如下更改

Stock

类：

public class Stock
{
    // other members here

    public string UserID { get; set; }
    public virtual ApplicationUser User { get; set; }
}

public ActionResult Create([Bind(Include = "StockId,Name,Ticker")] Stock stock)
{
    if (ModelState.IsValid)
    {
        stock.UserID = User.Identity.GetUserId();
        db.Stocks.Add(stock);
        db.SaveChanges();
        return RedirectToAction("Index");
    }
    return View(stock);
}

现在更改回发创建操作方法，如下所示：

public class Stock
{
    // other members here

    public string UserID { get; set; }
    public virtual ApplicationUser User { get; set; }
}

public ActionResult Create([Bind(Include = "StockId,Name,Ticker")] Stock stock)
{
    if (ModelState.IsValid)
    {
        stock.UserID = User.Identity.GetUserId();
        db.Stocks.Add(stock);
        db.SaveChanges();
        return RedirectToAction("Index");
    }
    return View(stock);
}

---

用户管理器使用的对象实例与控制器不同。因此EF无法正确跟踪用户对象。要解决此问题，只需如下更改

Stock

类：

public class Stock
{
    // other members here

    public string UserID { get; set; }
    public virtual ApplicationUser User { get; set; }
}

public ActionResult Create([Bind(Include = "StockId,Name,Ticker")] Stock stock)
{
    if (ModelState.IsValid)
    {
        stock.UserID = User.Identity.GetUserId();
        db.Stocks.Add(stock);
        db.SaveChanges();
        return RedirectToAction("Index");
    }
    return View(stock);
}

现在更改回发创建操作方法，如下所示：

public class Stock
{
    // other members here

    public string UserID { get; set; }
    public virtual ApplicationUser User { get; set; }
}

public ActionResult Create([Bind(Include = "StockId,Name,Ticker")] Stock stock)
{
    if (ModelState.IsValid)
    {
        stock.UserID = User.Identity.GetUserId();
        db.Stocks.Add(stock);
        db.SaveChanges();
        return RedirectToAction("Index");
    }
    return View(stock);
}