Question

我想在注册时获得UserId

[AllowAnonymous]
    [HttpPost]
    public ActionResult Register(RegisterModel model)
    {
        if (ModelState.IsValid)
        {
            // Attempt to register the user
            MembershipCreateStatus createStatus;
            Membership.CreateUser(model.UserName, model.Password, model.Email, passwordQuestion: null, passwordAnswer: null, isApproved: true, providerUserKey: null, status: out createStatus);

            if (createStatus == MembershipCreateStatus.Success)
            {
                FormsAuthentication.SetAuthCookie(model.UserName, createPersistentCookie: false);
                //Object reference not set to an instance of an object.
                Guid id = (Guid)System.Web.Security.Membership.GetUser().ProviderUserKey;
                System.Web.Security.Roles.AddUserToRole(model.UserName, "User");
                return RedirectToAction("Index", "Home");
            }
            else
            {
                ModelState.AddModelError("", ErrorCodeToString(createStatus));
            }
        }

        // If we got this far, something failed, redisplay form
        return View(model);
    }

但是发生错误（“对象引用未设置为对象的实例。”）。如何在register方法中获取userId？

感谢。

Answer 1

FormsAuthentication.SetAuthCookie对下一个请求进行身份验证，同一请求上的System.Web.Security.Membership.GetUser()将返回null：

SetAuthCookie方法向其中任何一个添加表单身份验证票证如果CookiesSupported为false，则为Cookie集合或URL。该 forms-authentication ticket提供表单 - 身份验证信息到浏览器发出的下一个请求。使用表单身份验证如果要对a进行身份验证，可以使用SetAuthCookie方法用户但仍保留对重定向的导航控制权。

Membership.CreateUser返回创建的用户，因此您应该能够执行此操作：

[AllowAnonymous]
[HttpPost]
public ActionResult Register(RegisterModel model)
{
    if (ModelState.IsValid)
    {
        // Attempt to register the user
        MembershipCreateStatus createStatus;
        MembershipUser membershipUser = Membership.CreateUser(model.UserName, model.Password, model.Email, passwordQuestion: null, passwordAnswer: null, isApproved: true, providerUserKey: null, status: out createStatus);

        if (createStatus == MembershipCreateStatus.Success)
        {
            FormsAuthentication.SetAuthCookie(model.UserName, createPersistentCookie: false);
            Guid id = (Guid)membershipUser.ProviderUserKey;
            ...

ASP.NET MVC在创建用户时获取userId？

1 个答案: