ASP.NETMVCView页面内判断是否登录

@if (Request.IsAuthenticated) {
<text>
你好，@Html.ActionLink(User.Identity.Name, "Manage", "Account", routeValues: null, htmlAttributes: new { @class = "username", title = "管理" })!
@using (Html.BeginForm("LogOff", "Account", FormMethod.Post, new { id = "logoutForm" })) {
@Html.AntiForgeryToken()
<a href="javascript:document.getElementById('logoutForm').submit()">注销</a>
}
</text>
} else {
<ul>
<li>@Html.ActionLink("注册", "Register", "Account", routeValues: null, htmlAttributes: new { id = "registerLink" })</li>
<li>@Html.ActionLink("登录", "Login", "Account", routeValues: null, htmlAttributes: new { id = "loginLink" })</li>
</ul>
}