Razor 语法基础

有兴趣的可以看看菜鸟教程的   http://www.runoob.com/aspnet/razor-cs-loops.html

1.ViewData展示登陆的Session信息

Controller:

 public ActionResult Index()
        {
            if (Session["username"] == null)
            {
                Response.Redirect("/Login/Index");
            }
            else
            {
                ViewData["username"] = Session["username"].ToString();
            }       
            return View();
        }

View:

 <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button"
                           aria-expanded="false">
                            <i class="fa fa-user-o fa-fw"></i>
                            @if (ViewData["username"]!=null)
                            {
                                    @ViewData["username"].ToString();
                            }                            
                            <span class="caret"></span>
                        </a>

效果：

2.添加一对<form>元素

@using(Html.BeginGorm())