创建用户时出现 ObjectDisposedException

Question

我在尝试创建用户时遇到错误。我在下面的代码中 line 15 得到了它。

1  public async void AddOrganisationAdmin()
2    {
3        
4        String OrganisationName = Request["OrganisationName"];
5        Debug.Print(OrganisationName);
6        RegisterViewModel model = new RegisterViewModel();
7        model.Email = "admin@" + OrganisationName;
8        model.Organisation = OrganisationName;
9        model.Password = "adminPassword!1";
10       model.ConfirmPassword = "adminPassword!1";
11       model.Role = "Organisation Administrator";
12
13
14       var user = new ApplicationUser() { UserName = model.Email, Email = model.Email, Organisation = model.Organisation, Role = model.Role };
15       IdentityResult result = await UserManager.CreateAsync(user, model.Password);
16   }

错误是：

An exception of type 'System.ObjectDisposedException' occurred in mscorlib.dll but 
was not handled in user code

Additional information: Cannot access a disposed object.

释放了什么对象？这些行是 asp.net mvc 5 项目中默认寄存器函数的副本，所以我做错了什么？

我正在从 ajax post 中调用该函数，如下所示：

$.ajax({
      url: "/Account/AddOrganisationAdmin",
      type: 'POST',
      data: { OrganisationName : "@CompanyName"},
      success: function (data, textStatus, xhr) {
             console.log(data);
      },
      error: function (xhr, textStatus, errorThrown) {
             console.log(xhr);
      }
});

我进入了这个函数，我得到了正确的名字。

Answer 1

tacos_tacos_tacos 的评论让我对 dbcontext 进行了一些研究，经过反复试验后，我得到了以下结果

1    public void AddOrganisationAdmin()
2    {
3        
4        String OrganisationName = Request["OrganisationName"];
5        Debug.Print(OrganisationName);
6        RegisterViewModel model = new RegisterViewModel();
7        model.Email = "admin@" + OrganisationName + ".com";
8        model.Organisation = OrganisationName;
9        model.Password = "adminPassword!1";
10       model.ConfirmPassword = "adminPassword!1";
11       model.Role = "Organisation Admin";
12       Promato.Models.ApplicationDbContext dbcontext = new Promato.Models.ApplicationDbContext();
13        
14       var user = new ApplicationUser() { UserName = model.Email, Email = model.Email, Organisation = model.Organisation, Role = model.Role };
15       user.PasswordHash = UserManager.PasswordHasher.HashPassword(model.Password);
16       user.SecurityStamp = Guid.NewGuid().ToString();
17       dbcontext.Users.Add(user);
18       dbcontext.SaveChanges();
19   }

这段代码对我有用。用户已添加到 .mdf，我可以登录:)

创建用户时出现 ObjectDisposedException

ObjectDisposedException when creating user

c#

objectdisposedexception

asp.net-mvc-5

usermanager