datagrid绑定list没有数据 表头不显示的解决方法

代码如下:
var list = Pt_OrderWorkFlow_DAO.GetOrderWorkFlow(wfid, uid, 1);
         if (list == null)
         {
             list = new List<Pt_OrderWorkFlow>();
         }
         dgWaitList.DataSource = list;
         dgWaitList.DataBind();
　　

可以直接这样比较优雅了
代码如下:
OADataContext db = DatabaseHelper.GetDB();
var rs = (from a in db.Pt_OrderWorkFlow
          where a.WFID == wfID && a.ContractNumber == cNumber 
          select a).ToList<Pt_OrderWorkFlow>();
return rs.Count() > 0 ? rs : new List<Pt_OrderWorkFlow>();