string constr = "server=localhost;User Id=root;password=;Database=blog";
            MySqlConnection mycon = new MySqlConnection(constr);
            mycon.Open();
            MySqlCommand mycmd = new MySqlCommand("insert into blog_category(cate_id,cate_name) values('90','abc')", mycon);
            if (mycmd.ExecuteNonQuery() > 0)
            {
                Console.WriteLine("数据插入成功！");
            }
            Console.ReadLine();
            mycon.Close();

string sql1 = string.Format(@"insert into temperature(time,temp) values ('{0}', '{1}')", TIME24,TEMP);
MySqlCommand mycmd = new MySqlCommand(sql1, mycon);