小弟想要用Asp.net + jquery 实现从数据库的查询问题 
public List<two> SelAll()
        {
            string sql = "select * from two";
            return GetListAll(getDS("0", sql));
        }        public List<two> GetListAll(DataSet ds)
        {
            List<two> list = new List<two>();
            foreach (DataRow dr in ds.Tables[0].Rows)
            {
                two t = new two();
                t.Id = Convert.ToInt32(dr["id"]);
                t.Username = dr["username"].ToString();
                t.Userpwd = dr["userpwd"].ToString();
                t.Age = dr["age"].ToString();
                t.Sex = dr["sex"].ToString();
                list.Add(t);
            }
            return list;
        }
----------------------------------------------------------DAL层
public List<two> SelAll()
        {
            return ts.SelAll();
        }
----------------------------------------------------------BLL层请问前台页面该如何用Ajax操作,请把具体代码贴出来,小弟初学jquery 跪谢