private void AddCmdItemForm_Load(object sender, EventArgs e) { technologyLib = new TechnologyLib(sqlConnection); dataSet = new DataSet(); technologyLib.GetCmdItemDetailsViewData(dataSet); technologyLib.GetProtocalData(dataSet); for (int i = 0; i < dataSet.Tables["Protocal"].Rows.Count; i++) { comboBox1.Items.Add(dataSet.Tables["Protocal"].Rows[i][1].ToString()); } technologyLib.GetCommPortData(dataSet); for (int i = 0; i < dataSet.Tables["CommPort"].Rows.Count; i++) { comboBox2.Items.Add(dataSet.Tables["CommPort"].Rows[i][1].ToString()); } }