private void show_button_Click(object sender, EventArgs e)
        {
            SalaryDetails salary = new SalaryDetails();

            Month selectedmonth = (Month)selectMonth_combobox.SelectedItem;

            List<SalaryDetails> list = new List<SalaryDetails>();
            if (DateTime.Parse(selectedmonth.Id + "/" + selectedmonth.NumberOfDays + "/" + selectYear_combobox.SelectedItem.ToString()) <= System.DateTime.Today.Date)
            {
                list = salary.GetMonthlySalaryDetails(selectedmonth.Id.ToString(), selectYear_combobox.SelectedItem.ToString(), selectedmonth.NumberOfDays.ToString());
                dataGridView1.DataSource = list;
            }
            else {
                MessageBox.Show("The selected date exceeds today's date", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        private void show_button_Click(object sender, EventArgs e)
        {
            SalaryDetails salary = new SalaryDetails();

            Month selectedmonth = (Month)selectMonth_combobox.SelectedItem;

            List <SalaryDetails> list = new List <SalaryDetails>();

            if (DateTime.Parse(selectedmonth.Id + "/" + selectedmonth.NumberOfDays + "/" + selectYear_combobox.SelectedItem.ToString()) <= System.DateTime.Today.Date)
            {
                list = salary.GetMonthlySalaryDetails(selectedmonth.Id.ToString(), selectYear_combobox.SelectedItem.ToString(), selectedmonth.NumberOfDays.ToString());
                dataGridView1.DataSource = list;
            }
            else
            {
                MessageBox.Show("The selected date exceeds today's date", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }