public ActionResult Detail()
{
db = new biosealEntities();
int id = Convert.ToInt32(Request.QueryString["id"]);
var news = db.News.Where(i => i.Id == id).Single();
int NewsTypeId = news.CategoryId;
//获取上一条下一条记录
var prenews = db.News.Where(i => i.Id < id && i.CategoryId ==NewsTypeId).OrderByDescending(i => i.Id).FirstOrDefault();
ViewBag.prenews = prenews;
var nextnews = db.News.Where(i => i.Id > id && i.CategoryId == NewsTypeId).OrderBy(i => i.Id).FirstOrDefault();
ViewBag.nextnews = nextnews;
return View(news);
}