Get user.Identity.GetUserId() always null - asp.net

Question

I am using asp.net membership. I have login successfully but when I have access user than user.Identity.GetUserId() always null.
this is my login code.
var signinManager = Context.GetOwinContext().GetUserManager<ApplicationSignInManager>();
SignInStatus result = signinManager.PasswordSignIn(txtEmail.Text, txtPassword.Text, RememberMe.Checked, false);
switch (result)
{
case SignInStatus.Success:
string strReturnUrl = Request.QueryString["ReturnUrl"] ?? "";
if (string.IsNullOrWhiteSpace(strReturnUrl))
{
if (GenericMethods.CheckUserInRole(user, UserRoles.SystemAdmin.ToString()))
strReturnUrl = "~/Admin/SettingsMaster.aspx";
else if (GenericMethods.CheckUserInRole(user, UserRoles.Admin.ToString()))
strReturnUrl = "~/Admin/SettingsMaster.aspx";
else if (GenericMethods.CheckUserInRole(user, UserRoles.CorporateSponsor.ToString()))
strReturnUrl = "~/";
else if (GenericMethods.CheckUserInRole(user, UserRoles.Advertiser.ToString()))
{
int productcount = ProductBL.GetInactiveProductCount(user.Id);
if (String.IsNullOrEmpty(user.FirstName) || String.IsNullOrEmpty(user.LastName) ||
String.IsNullOrEmpty(user.Address1) || String.IsNullOrEmpty(user.PhoneNumber) ||
String.IsNullOrEmpty(user.Email) || String.IsNullOrWhiteSpace(user.Birthdate.ToString()))
{
strReturnUrl = "~/MyAccount/ProfileSetting.aspx";
}
else if (productcount > 0)
{
strReturnUrl = "~/MyAccount/ViewFeatureProduct.aspx";
}
else
strReturnUrl = "~/MyAccount/AdvertiserTutorial.aspx";
}
else if (GenericMethods.CheckUserInRole(user, UserRoles.Subscriber.ToString()))
{
int productcount = ProductBL.GetInactiveProductCount(user.Id);
if (String.IsNullOrEmpty(user.FirstName) || String.IsNullOrEmpty(user.LastName) ||
String.IsNullOrEmpty(user.Address1) || String.IsNullOrEmpty(user.PhoneNumber) ||
String.IsNullOrEmpty(user.Email) || string.IsNullOrWhiteSpace(user.Birthdate.ToString()))
{
strReturnUrl = "~/MyAccount/ProfileSetting.aspx";
}
else if (productcount == 0)
{
strReturnUrl = "~/MyAccount/TradeMyStuff.aspx";
}
else
strReturnUrl = "~/";
}
}
var userLoginInfo = new UserLoginInfo("ClosetAuctions.com", "CA");
userManager.AddLogin(user.Id, userLoginInfo);
user.LastLoginDate = DateTime.Now;
userManager.Update(user);
IdentityHelper.RedirectToReturnUrl(strReturnUrl, Response);
break;
case SignInStatus.LockedOut:
Response.Redirect("/Account/Lockout");
break;
case SignInStatus.RequiresVerification:
Response.Redirect(
String.Format("/Account/TwoFactorAuthenticationSignIn?ReturnUrl={0}&RememberMe={1}",
Request.QueryString["ReturnUrl"],
RememberMe.Checked),
true);
break;
// ReSharper disable once RedundantCaseLabel
case SignInStatus.Failure:
default:
FailureText.Text = "Invalid login attempt";
ErrorMessage.Visible = true;
break;
}
I am getting userId here.
public static ApplicationUser GetCurrentUser()
{
var user = HttpContext.Current.User;
if (user == null) return null;
if (user.Identity.GetUserId() == null) return null;
var db = new MyDbContext();
var manager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(db));
return manager.FindById(user.Identity.GetUserId());
// manager.AddClaim(CurrentUser.Id, new Claim(ClaimTypes.Role, "systemAdmin"));
// manager.AddClaim(CurrentUser.Id, new Claim(ClaimTypes.Role, "admin"));
}
I am not sure, where I am wrong.
If any one know then Can you please help me.

Answer 1

Maybe you check authentication first.
if (User.Identity.IsAuthenticated)
{
string userId = HttpContext.Current.User.Identity.Name;
}