c# - ASP.NET Identity CreateAsync 返回错误 "Name cannot be null or empty."

Question

我已经尝试了所有可以在 SO 上找到的答案。我正在尝试将身份添加到我的 ASP.NET MVC 5 项目中。我首先使用数据库。已经有一个现有的数据库。我使用此 GitHub 中的脚本在我的数据库中创建身份表。

https://gist.github.com/jeroenheijmans/8fa79427abc25a864cb055616644172f

这是我的 Startup.cs 文件

public void Configuration(IAppBuilder app)
    {

        app.CreatePerOwinContext(() => new AppDbContext());
        app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create);
        app.CreatePerOwinContext<RoleManager<AspNetRole>>((options, context) =>
          new RoleManager<AspNetRole>(
              new RoleStore<AspNetRole>(context.Get<AppDbContext>())));


        app.UseCookieAuthentication(new Microsoft.Owin.Security.Cookies.CookieAuthenticationOptions()
        {
            AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
            LoginPath = new PathString("/Account/Login")


        });

    }

这是我的应用程序用户管理器:

public void Configuration(IAppBuilder app)
    {

        app.CreatePerOwinContext(() => new AppDbContext());
        app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create);
        app.CreatePerOwinContext<RoleManager<AspNetRole>>((options, context) =>
          new RoleManager<AspNetRole>(
              new RoleStore<AspNetRole>(context.Get<AppDbContext>())));


        app.UseCookieAuthentication(new Microsoft.Owin.Security.Cookies.CookieAuthenticationOptions()
        {
            AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
            LoginPath = new PathString("/Account/Login")


        });

    }

这是我的注册操作:

 public async Task<ActionResult> Register()
        {
            var model = (RegisterUserModel)Session["RegisterAccount"];
            var user = new AspNetUser()
            {
                UserName = model.Email,
                Email = model.Email
            };
            var userManager = Request.GetOwinContext().GetUserManager<ApplicationUserManager>();
            IdentityResult addUserResult = await userManager.CreateAsync(user, model.Password);
}

我的角色类

public partial class AspNetRole : IdentityRole
    {
        public AspNetRole(string name) { Name = name; }
    }

我的用户类

 public partial class AspNetUser : IdentityUser
{

}

我的数据库上下文

         public partial class AppDbContext: IdentityDbContext<AspNetUser>
{
        public AppDbContext(string connectionString)
            : base(connectionString)
        {}
    }

Answer 1

检查 model.Email 值。它似乎是空的。为了确定，将 Register 方法放入 try-catch block 中，并尝试提取有关错误/异常的更多详细信息:

public async Task<ActionResult> Register()
{
  try
  {
    var model = (RegisterUserModel)Session["RegisterAccount"];
    var user = new AspNetUser()
    {
      UserName = model.Email,
      Email = model.Email
    };
    var userManager = Request.GetOwinContext().GetUserManager<ApplicationUserManager>();
    IdentityResult addUserResult = await userManager.CreateAsync(user, model.Password);

    if (!addUserResult.Succeeded)
    {
      //loop over addUserResult.Errors for more detail
    }
  }
  catch (Exception exception)
  {
    //here, check the exception for more details
  }
}