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Hello All,

Thanks in advance. After enough googling and try and error I decided to write very simple question here.

I am working on TASK where I want to display vehicle numbers on display like railway station where LED screens shows Vehicle Numbers.

I have designed Windows Form. with one gridview. In this form I have added only one gridview.

According to requirement I have to show only 3 records at a time.

My problem is first three records are getting displayed well after that gridview is not adding next three records.

Please check below code of load vehicle data method :I called this method from timer tick event after 30 seconds. I have also used process status variable which checks that process is in progress or not. If process is not in progress then only timer calls that load vehicle data method
C#
private void loadVehicleNumbers()
       {
           try
           {
               processStatus = 1;
                   DataTable dtVehicleData = ApplicationManager.DAL.getVehicleDetailsWhoseCommissioningIsNotDone();
                   MessageBox.Show("Number of vehicles : "+dtVehicleData.Rows.Count);
                   if (dtVehicleData.Rows.Count > 0)
                   {
                       this.dgv_vehicleNumbers.Rows.Clear();

                       int j = 0;
                       for (int i = 0; i < dtVehicleData.Rows.Count; i++)
                       {
                           if (j == 3)
                           {
                               Thread.Sleep(10000);

                               j = 0;
                               dgv_vehicleNumbers.Rows.Clear();
                               dgv_vehicleNumbers.Update();
                               dgv_vehicleNumbers.Refresh();

                           }

                           string vehicleNumber = dtVehicleData.Rows[i]["VEHICLE_NUMBER"].ToString();
                           string EntryNumber = dtVehicleData.Rows[i]["Entry_NUMBER"].ToString();
                           string drivingLicensenumber = dtVehicleData.Rows[i]["Driver_NUMBER"].ToString();
                           string driver_Name = dtVehicleData.Rows[i]["DRIVER_NAME"].ToString();

                           //MessageBox.Show("Driver License Number :" + drivingLicensenumber);

                           int temp = i + 1;
                           string[] row1 = new string[] { "" + temp, vehicleNumber, driver_Name };
                           this.dgv_vehicleNumbers.Rows.Add(row1);

                           j++;
                           dgv_vehicleNumbers.Update();
                           dgv_vehicleNumbers.Refresh();
                           if (i == (dtVehicleData.Rows.Count - 1))
                           {
                               Thread.Sleep(10000);
                           }

                       }
                   }
                   else
                   {
                       Thread.Sleep(10000);
                   }
                   processStatus = 0;

           }
           catch (Exception ex)
           {
               frmHZLHome.WriteErrorLog(DateTime.Now.ToString("dd/MMM/yyyy HH:mm:ss") + ",Driver Room LED Display ," + ex.Message);
           }
       }

private void timer1_Tick(object sender, EventArgs e)
       {
           if (processStatus == 0)
           {
               MessageBox.Show("Loading  vehicles");
               loadVehicleNumbers();
           }
       }
Posted
Updated 1-Sep-15 23:18pm
v2
Comments
j snooze 2-Sep-15 17:34pm    
pretty sure if you set a break point in the method and debug you will find the issue quickly. i'm not understanding what you are trying to accomplish. You want to show 3 records and you say that is working well, but not the next 3? so you should be showing 6 now or a different 3 records? What tells your method not to grab the same 3 records over and over?
[no name] 3-Sep-15 1:32am    
Thread.Sleep();

which results in not responding state of application

1 solution

Hello,

All never use Thread.Sleep(); in windows form application.

Use timers as per your requirement.
 
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