// GET: Goods
 public ActionResult GoodsIndex(int?tid_1, int?typeid_1, int?typeid_2, string txt = "")
 {
     //清空session数据
     Session.Remove("Goods");
     Session.Remove("Goods_tid");
     Session.Remove("Goods_typeid");
     //获得所有分类数据
     ViewBag.Type       = TypeTableBll.SelectAllType();
     ViewBag.GoodsPhoto = GoodsPhotoBll.SelectAllGoodsPhoto();
     if (tid_1 != null)
     {
         //根据tid查询
         Session["Goods_tid"] = GoodsBll.SelectTidGoods(tid_1 ?? 0);
         //ViewBag.tid = tid_1 ?? 0;
     }
     else if (typeid_1 != null)
     {
         //根据tiyeid查询
         Session["Goods_typeid"] = GoodsBll.SelectTypeidGoods(typeid_1 ?? 0);
     }
     else if (typeid_2 != null)
     {
         Session["Goods_typeid_2"] = GoodsBll.SelectType1Goods(typeid_2 ?? 0);
     }
     else
     {
         Session["Goods"] = GoodsBll.SelectAllGoods().Where(p => p.GoodsName.Contains(txt) && p.IsDelte == 0).OrderBy(p => p.GoodsHot).ToList();
     }
     return(View());
 }