public AddMachine(string demoNumber) { InitializeComponent(); List <string> machineInfo = CC.ShowMachine(demoNumber); List <TextBox> textBoxList = new List <TextBox> { txtModelNumber, txtBrand, txtChassisNumber, txtMastType, txtMastBuildingHeight, txtMastLiftingHeight, txtMastFreeLift, txtAggregateType, txtAggregateNumber, txtBatteryType, txtBatteryNumber, txtChargerType, txtChargerNumber, txtController, txtWeight, txtHeight, txtLength, txtWidth }; cbModelName.Enabled = false; cbModelName.Items.Add(CC.GetModelName(demoNumber)); cbModelName.Text = CC.GetModelName(demoNumber); txtDemoMachine.Text = demoNumber; txtDemoMachine.ReadOnly = true; int i = 0; foreach (TextBox tb in textBoxList) { tb.Text = machineInfo[i]; tb.ReadOnly = true; i++; } btnAddMachine.Visible = false; btnSaveMachine.Visible = false; btnEditMachine.Visible = true; demoNumbers = demoNumber; }