前端笔记

1，<fieldset>元素可将表单内的相关元素分组，<legend>标签为<fieldset>标签定义标题，示例代码如下：

<form>
  <fieldset>
    <legend>health information</legend>
    height: <input type="text" />
    weight: <input type="text" />
  </fieldset>
</form>

2，<Header>用来定义文档的页眉。<nav>标签定义导航链接的部分，如在_Logout.cshtml中添加如下导航信息：

    <header>
        <nav>
            @Html.ActionLink("首页","Index","Home") | @Html.ActionLink("购物车","Index","Cart")
            @if(User.Identity.IsAuthenticated)
            {
                @:|@Html.ActionLink("注销","Logout","Member")
            }
            else
            {
                @:|@Html.ActionLink("登录","Login","Member")
                @:|@Html.ActionLink("注册","Register","Member")
            }
        </nav>
    </header>