private void button1_Click(object sender, EventArgs e)
        {
            AttendanceClass ac = new AttendanceClass();

            String[] time = { "08:15", "08:25", "08:55", "09:15", "08:00", "08:22", "09:05", "08:05", "09:20", "08:35" };
            String[] date = { "9-10-2019", "11-10-2019", "15-10-2019", "12-11-2019", "12-10-2019", "10-09-2019", "27-10-2019", "25-11-2019", "5-11-2019", "12-12-2019" };
            int[]    id   = { 1, 2, 1, 4, 5, 3, 7, 4, 2, 1 };

            for (int x = 0; x < 10; x++)
            {
                ac.Insert(id[x], date[x], time[x]);
            }
        }
        private void BtnInsert_Click(object sender, EventArgs e)
        {
            if (txtEmployeeId.Text == string.Empty)
            {
                MessageBox.Show("Plaese fill the empty fields!");
            }
            else if (txtEmployeeId.Text == string.Empty)
            {
                MessageBox.Show("Please enter an Employee Id!");
            }

            /*  else if(txtArrivedTime.Text == string.Empty)
             * {
             *    MessageBox.Show("Plaese enter the arrived time");
             * }*/

            else if (!int.TryParse(txtEmployeeId.Text, out Id))
            {
                MessageBox.Show("Employee ID is invaid");
            }

            else
            {
                a.EmployeeId = Int32.Parse(txtEmployeeId.Text);
                a.Date       = dateTimePicker1.Text;

                // lblInTime.Text = DateTime.Now.ToString("HH:mm");
                a.ArrivedTime = lblInTime.Text;
                //a.ArrivedTime = lblInTime.Text;
                // a.ArrivedTime = txtArrivedTime.Text;
                // a.LeftTime = int.Parse(txtLeaftTime.Text);

                bool success = a.Insert(a);
                if (success == true)
                {
                    MessageBox.Show("Successfully inserted");
                }
                else
                {
                    MessageBox.Show("Cannot insert");
                }

                DataTable dt = a.Select();
                dataGridView.DataSource = dt;
            }
        }