系统管理程序中如何备份数据库、还原数据库[代码]

namespace DAL
{
    public class SystemService
    {
        public string DataSoureBack(string path)
        {
            string result = string.Empty;
            SqlConnection conn = new SqlConnection("Server=.;Database=master;User ID=sa;Password=Dhcs)_+;");
            SqlCommand cmdBK = new SqlCommand();
            cmdBK.CommandType = CommandType.Text;
            cmdBK.Connection = conn;
            cmdBK.CommandText = @"backup database lnsmB2B to disk=‘" + path + "‘ with init";
            try
            {
                conn.Open();
                cmdBK.ExecuteNonQuery();
                result = "success";
            }
            catch (Exception ex)
            {
                result = ex.Message;
            }
            finally
            {
                conn.Close();
                conn.Dispose();
            }
            
            return result;
        }

        public string RestoreData(string path) 
        {
            string temp = string.Empty;
            SqlConnection conn = new SqlConnection("Server=.;Database=master;User ID=sa;Password=Dhcs)_+;Trusted_Connection=False");
            conn.Open();
            //KILL DataBase Process
            SqlCommand cmd = new SqlCommand("SELECT spid FROM sysprocesses ,sysdatabases WHERE sysprocesses.dbid=sysdatabases.dbid AND sysdatabases.Name=‘lnsmB2B‘", conn);
            SqlDataReader dr;
            dr = cmd.ExecuteReader();
            ArrayList list = new ArrayList();
            while (dr.Read())
            {
                list.Add(dr.GetInt16(0));
            }
            dr.Close();
            for (int i = 0; i < list.Count; i++)
            {
                cmd = new SqlCommand(string.Format("KILL {0}", list[i]), conn);
                cmd.ExecuteNonQuery();
            }
            SqlCommand cmdRT = new SqlCommand();
            cmdRT.CommandType = CommandType.Text;
            cmdRT.Connection = conn;
            cmdRT.CommandText = @"restore database lnsmB2B from disk=‘" + path + "‘";
            try
            {
                cmdRT.ExecuteNonQuery();
                temp = "success";
            }
            catch (Exception ex)
            {
                temp = ex.Message;
            }
            finally
            {
                conn.Close();
            }
            return temp;
        }
    }
}

namespace BLL
{
    public class BackMsgManager
    {
        private DAL.BackMsgService service = new DAL.BackMsgService();

        /// <summary>
        /// 返回所有的数据备份记录
        /// </summary>
        /// <returns></returns>
        public IList<MODEL.BackMsg> GetBackMsg()
        {
            return service.GetBackMsg();
        }

        /// <summary>
        /// 添加一条新的数据备份记录
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public bool AddBackMsg(MODEL.BackMsg model)
        {
            return service.AddBackMsg(model);
        }

        /// <summary>
        /// 删除指定ＩＤ的数据备份记录
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public bool DeleteBackMsg(string id)
        {
            return service.DeleteBackMsg(id);
        }
    }
}