ORM小结

//
//表现层
//
protected void submitadd_Click(object sender, EventArgs e)
        {
            Model.User user = new Model.User();

            user.uid = this.txt_uid.Text.Trim();
            user.uname = this.txt_uname.Text.Trim();
            user.pwd = this.pwd.Text.Trim();
            user.registerDate = DateTime.Now;
            user.ugender = Int32.Parse(this.ddl_gender.SelectedValue);
            user.signature = this.signature.Text.Trim();
            user.headPic = _imgName.Value;

            bool result = ulc.InsertNewUser(user);
            if (result)
            {
                this.finishedTips.Visible = true;
                this.finishedTips.Text = "添加成功";
            }
            else
            {
                this.finishedTips.Visible = true;
                this.finishedTips.Text = "添加失败";
            }
        }

//
//逻辑层
//
public class UserBusinessOpation
{
            /// <summary>
        /// 更新一条记录
        /// </summary>
        /// <param name="user"></param>
        /// <returns></returns>
        public bool UpdateUser(User user)
        {
            string sql = "update User_T set uname=‘" + user.uname + "‘,pwd=‘" + user.pwd + "‘,ugender=" + user.ugender + ",registerDate=‘" + user.registerDate + "‘,signature=‘" + user.signature + "‘,headPic=‘" + user.headPic + "‘ where uid=‘"+user.uid+"‘";
            return db.ExecuteInsertOrUpdateSql(sql);
        }
        /// <summary>
        /// 获取某个用户的详细信息
        /// </summary>
        /// <param name="uid"></param>
        /// <returns></returns>
        public DataTable GetUserDetail(string uid)
        {
            string sql = "select * from User_T where uid=‘" + uid + "‘";
            return db.GetTable(sql);
        } 

        /// <summary>
        /// 删除某个用户
        /// </summary>
        /// <param name="uid"></param>
        /// <returns></returns>
        public bool DeleteUser(string uid)
        {
            string sql = "delete from User_T where uid=‘"+uid+"‘";
            return db.ExecuteInsertOrUpdateSql(sql);
        }
}

//
//数据访问层
//
pubilc clas DB
{
             private static string ConnString = System.Configuration.ConfigurationManager.ConnectionStrings["SqlServerConn"].ToString();
        
        /*****************************************************************************/
        //直接使用sql语句，适用于无参数的调用
        #region 执行SQL语句，返回一个DataTable对象
        /// <summary>
        /// 返回一个DataTable对象
        /// </summary>
        /// <param name="strSql">需要执行 的SQL语句</param>
        /// <returns>DataTable对象</returns>
        public DataTable GetTable(string strSql)
        {
            SqlConnection conn = new SqlConnection(ConnString);
            conn.Open();
            SqlDataAdapter da = new SqlDataAdapter(strSql, conn);
            DataTable dt = new System.Data.DataTable();
            try
            {
                da.Fill(dt);
                return dt;
            }
            catch (Exception e)
            {
                throw new Exception("执行任务失败:" + e.Message + "   " + strSql);
            }
            finally
            {
                conn.Close();
            }
        }
        #endregion
        #region 执行添加,修改，删除的时候进行验证的方法
        /// <summary>
        /// 执行添加的时候进行验证的方法，返回结果的sql更新语句
        /// </summary>
        /// <param name="strSql">需要执行的sql语句</param>
        /// 返回一个boolean型的值
        public Boolean ExecuteInsertOrUpdateSql(string strSql)
        {
            SqlConnection conn = new SqlConnection(ConnString);
            conn.Open();
            SqlCommand cmd = new SqlCommand(strSql, conn);
            try
            {
                int count = cmd.ExecuteNonQuery();
                if (count > 0)
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }
            catch (Exception e)
            {
                throw new Exception("执行任务失败:" + e.Message + "   " + strSql);

            }
            finally
            {
                conn.Close();
                cmd.Dispose();
            }
        }
        #endregion   
}