private void updateAge(string std_Birthday, string std_ID)
        {
            calculateAge calculateAge = new calculateAge();
            var          Age          = calculateAge.calAge(Convert.ToDateTime(std_Birthday));

            database.strSQL = "UPDATE tblStudent SET " +
                              " std_AgeY=" + Age.Year + ", " +
                              " std_AgeM=" + Age.Month +
                              " WHERE std_ID=" + std_ID;
            database.DoSQL(database.strSQL);
        }
        private void btnCalAge_Click(object sender, EventArgs e)
        {
            DialogResult Result = MessageBoxAdv.Show("�س�������ѹ���Ѩ�غѹ�ͧ����������ͧ�س�١��ͧ������������� ?", "�׹�ѹ��õ�Ǩ�ͺ�ѹ���",
                                                     MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2);

            if (Result == DialogResult.Yes)
            {
                calculateAge calculateAge = new calculateAge();
                var          Age          = calculateAge.calAge(dtpBirthday.Value);
                txtStdAgeY.Text = Age.Year.ToString();
                txtStdAgeM.Text = Age.Month.ToString();
                database.strSQL = "UPDATE tblStudent SET " +
                                  " std_AgeY=" + txtStdAgeY.Text + ", " +
                                  " std_AgeM=" + txtStdAgeM.Text +
                                  " WHERE std_ID=" + txtStdID.Text;
                database.DoSQL(database.strSQL);
            }
        }