Monitoring System for the Construction of Arch Cover Method Subway Station Based on DT and IoT

Code 1

   string sqlstr3 = "select Sensor ID, Sensor type, Measuring point number, Monitoring value,Unit, Temperature, Monitoring time, from monitoring data table where(Measuring point number ='" + comboBox2.Text + "')order by Monitoring time desc";

   DataSet ds = database.getSet(sqlstr3, " monitoring data table ");

   dataGridView1.DataSource = ds.Tables[0]…….