public string TestUnit(LoginViewModel ssd)
 {
     if (ssd.Email == "*****@*****.**")
         return "正确";
     else
         return "cuowu";
   
 }
 public async Task<ActionResult> Login(LoginViewModel model, string returnUrl)
 {
     if (!ModelState.IsValid)
     {
         return View(model);
     }
    
     // 这不会计入到为执行帐户锁定而统计的登录失败次数中
     // 若要在多次输入错误密码的情况下触发帐户锁定,请更改为 shouldLockout: true
     var result = await SignInManager.PasswordSignInAsync(model.Email, model.Password, model.RememberMe, shouldLockout: false);
     switch (result)
     {
         case SignInStatus.Success:
             return RedirectToLocal(returnUrl);
         case SignInStatus.LockedOut:
             return View("Lockout");
         case SignInStatus.RequiresVerification:
             return RedirectToAction("SendCode", new { ReturnUrl = returnUrl, RememberMe = model.RememberMe });
         case SignInStatus.Failure:
         default:
             ModelState.AddModelError("", "无效的登录尝试。");
             return View(model);
     }
 }