相关疑难解决方法(0)

简而言之,在POSTing包装器模型期间抛出异常并将一个条目的状态更改为"已修改".在更改状态之前,状态设置为'Detached'但调用Attach()会产生相同的错误.我正在使用EF6.

请在下面找到我的代码(模型名称已更改,以便于阅读)

模型

// Wrapper classes
        public class AViewModel
        {
            public A a { get; set; }
            public List<B> b { get; set; }
            public C c { get; set; }
        }   

调节器

        public ActionResult Edit(int? id)
        {
            if (id == null)
            {
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
            }

            if (!canUserAccessA(id.Value))
                return new HttpStatusCodeResult(HttpStatusCode.Forbidden);

            var aViewModel = new AViewModel();
            aViewModel.A = db.As.Find(id);

            if (aViewModel.Receipt == null)
            {
                return HttpNotFound();
            }

            aViewModel.b = db.Bs.Where(x => x.aID == id.Value).ToList();
            aViewModel.Vendor = db.Cs.Where(x => x.cID …

我已经在ApplicationUser课程中添加了自定义字段,
我还创建了一个表单,用户可以通过该表单输入/编辑字段.
但由于某种原因,我无法更新数据库中的字段.

[HttpPost]
[ActionName("Edit")]
[ValidateAntiForgeryToken]
public async Task<ActionResult> Manage(EditProfileViewModel model)
{
    if (ModelState.IsValid)
    {
        // Get the current application user
        var user = User.Identity.GetApplicationUser();

        // Update the details
        user.Name = new Name { First = model.FirstName, Last = model.LastName, Nickname = model.NickName };
        user.Birthday = model.Birthdate;

        // This is the part that doesn't work
        var result = await UserManager.UpdateAsync(user);

        // However, it always succeeds inspite of not updating the database
        if (!result.Succeeded)
        {
            AddErrors(result);
        }
    }

    return …