部分视图中的提交按钮返回结果没有布局

Question

我有一个使用partialView进行登录的共享布局。 如果登录过程成功，它会重定向到主页，一切正常，但如果登录失败， 它仅返回带有错误的部分视图，而不包含共享布局。

结果是一个包含此网址的网页：localhost:35967/Account/Login，只有部分视图包含验证摘要错误。

如何解决？

这是我的代码：

AccountController.cs

    [HttpGet]
    public ActionResult Login()
    {
        return PartialView();
    }

    [AllowAnonymous]
    [HttpPost]
    public ActionResult Login(LoginModel login,string returnUrl)
    {
        if (ModelState.IsValid)
        {
            if (ValidateUser(login))
            {
                FormsAuthentication.SetAuthCookie(login.Username, false);
                return Redirect(returnUrl ?? Url.Action("Index", "Home"));
            }

            ModelState.AddModelError("", "User not found");
        }

        return PartialView(login);
    }

Login.cshtml

@model DesignCrafts.MVC.Models.LoginModel
@using (Html.BeginForm("Login", "Account", FormMethod.Post, new { id = "login", @class = "enter_form" }))
{
<span style="color:red">@Html.ValidationSummary(true, "Login failed")</span>

    @Html.TextBoxFor(model => model.Username, new { @placeholder = "username" })
    @Html.ValidationMessageFor(model => model.Username)

    @Html.PasswordFor(model => model.Password, new { @placeholder = "password" })
    @Html.ValidationMessageFor(model => model.Password)

    <input type="submit" value="login" class="btn" />

    <span style="margin-right:5px">
        @Html.ActionLink("register", "Register", "Account", new { @class = "white-link"})
    </span>
    @Html.ValidationSummary(true, "user not found")

}

_Layout.cshtml

     @if (Request.IsAuthenticated)
     {
        <div class="enter">
        <div>
        Logged as: @User.Identity.Name
        </div>
        @Html.ActionLink("Log out", "Logoff", "Account", null, new { @class = "exit" })
        </div>
      }
     else
      {
          { Html.RenderAction("Login", "Account"); }
      }