private void button11_Click(object sender, EventArgs e)
        {
            try
            {
                member stuObj = null;
                bool   result = false;
                string gen    = null;
                if (rdoMale.Checked)
                {
                    gen = "Male";
                }
                else if (rdoFemale.Checked)
                {
                    gen = "Female";
                }

                if (rdoUG.Checked)
                {
                    stuObj = new Annual(txtSid.Text, txtFname.Text, txtLname.Text, dtpDateOfBirth.Text,
                                        Convert.ToInt32(txtAge.Text), txtTele.Text, txtAddress.Text, gen, name.Text,
                                        Convert.ToInt32(txtduration.Text), comboBox1.Text, txtstatus.Text);
                }
                else if (rdoPG.Checked)
                {
                    stuObj = new six_month(txtSid.Text, txtFname.Text, txtLname.Text, dtpDateOfBirth.Text,
                                           Convert.ToInt32(txtAge.Text), txtTele.Text, txtAddress.Text, gen, txtsix.Text,
                                           Convert.ToInt32(txtsixdu.Text), comboBox2.Text, txtsixsta.Text);
                }
                result = stuObj.register();
                if (result)
                {
                    MessageBox.Show("Member has been successfully entered");
                }
                else
                {
                    MessageBox.Show("Insert Failed Try again...");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        private void button17_Click(object sender, EventArgs e)
        {
            member stuObj = null;
            bool   result = false;
            string gen    = null;

            if (rdoMale.Checked)
            {
                gen = "Male";
            }
            else if (rdoFemale.Checked)
            {
                gen = "Female";
            }

            if (rdoUG.Checked)
            {
                stuObj = new Annual(txtSid.Text, txtFname.Text, txtLname.Text, dtpDateOfBirth.Text,
                                    Convert.ToInt32(txtAge.Text), txtTele.Text, txtAddress.Text, gen, name.Text,
                                    Convert.ToInt32(txtduration.Text), comboBox1.Text, txtstatus.Text);
            }
            else if (rdoPG.Checked)
            {
                stuObj = new six_month(txtSid.Text, txtFname.Text, txtLname.Text, dtpDateOfBirth.Text,
                                       Convert.ToInt32(txtAge.Text), txtTele.Text, txtAddress.Text, gen, txtsix.Text,
                                       Convert.ToInt32(txtsixdu.Text), comboBox2.Text, txtsixsta.Text);
            }
            result = stuObj.updatemembers();
            if (result)
            {
                MessageBox.Show(txtSid.Text + " has been updated");
            }
            else
            {
                MessageBox.Show("Error Encountered");
            }
        }