private string constring="data source=112.74.73.122;initial catalog=qzyData;user id=sa;password=11111111";        //18经度        //19纬度        private string FindUserMobilephone( )        {            string strCmd;            string phone = "";            strCmd = "select * from QZY_sites";            //PublicFunction.WriteLog("123： ", strCmd);            SqlConnection conn = new SqlConnection();            conn.ConnectionString = constring;            try            {                conn.Open();                SqlCommand cmd = new SqlCommand(strCmd, conn);                SqlDataReader rr = cmd.ExecuteReader();                while (rr.Read())                {                    phone += rr[1].ToString();                }            }            catch (SqlException sqle)            {                //PublicFunction.WriteLog("456： ", sqle.Message);            }            return phone;        }