private void CLEAR_DATA()
 {
     LBL_RESERVATION_ID.Text    = "N/A";
     DTP_RESERVATION_DATE.Value = DateTime.Now;
     TXT_F_NAME.Clear();
     TXT_L_NAME.Clear();
     TXT_EMAIL.Clear();
     TXT_TEL.Clear();
     TXT_NO_OF_ROOMS.Text = "0";
     TXT_ADULT.Text       = "0";
     TXT_CHILD.Text       = "0";
     LST_SELECTED_ROOM.Items.Clear();
     TXT_NIC_NO.Clear();
     DTP_ARRIVAL_DATE.Value       = DateTime.Now;
     DTP_DEPATURE_DATE.Value      = DateTime.Now;
     TXT_NO_OF_NIGHTS.Text        = "0";
     CMB_RESERVE_BY.SelectedIndex = -1;
     CMB_AGENT.SelectedIndex      = -1;
     LBL_AGENT_NAME.Visible       = false;
     // BTN_MAKE_NEW_AGENT.Visible = false;
     TXT_NOTE.Clear();
     TXT_F_NAME.Enabled = true;
     TXT_L_NAME.Enabled = true;
     TXT_TEL.Enabled    = true;
     TXT_EMAIL.Enabled  = true;
     LBL_SELECTED_ROOM_CONDITION.Text   = "N/A";
     LBL_SELECTED_ROOM_PRICE.Text       = "0.00";
     LBL_SELECTED_ROOM_DESCRIPTION.Text = "N/A";
     LBL_TOT_CHARGE_LKR.Text            = "0.00";
     LBL_TOT_CHARGE_USD.Text            = "0.00";
 }
 private void TXT_NIC_NO_KeyDown(object sender, KeyEventArgs e)
 {
     if (e.KeyCode == Keys.Enter)
     {
         TXT_F_NAME.Focus();
     }
     if (e.KeyCode == Keys.Down)
     {
         if (LST_GUEST_LIST.Items.Count > 0)
         {
             LST_GUEST_LIST.Focus();
             LST_GUEST_LIST.Items[0].Selected = true;
         }
     }
 }
        private void BTN_SAVE_Click(object sender, EventArgs e)
        {
            if (TXT_F_NAME.Text.Length == 0)
            {
                TXT_F_NAME.Focus();
                MSGBOX mdg = new MSGBOX(MessageAlertHeder.Alert(), "PLEASE ENTER GUEST NAME!", MessageAlertImage.Alert());
                mdg.ShowDialog();
            }
            else if (TXT_TEL.Text.Length == 0)
            {
                TXT_TEL.Focus();
                MSGBOX mdg = new MSGBOX(MessageAlertHeder.Alert(), "PLEASE ENTER TELEPHONE NO!", MessageAlertImage.Alert());
                mdg.ShowDialog();
            }
            else if (TXT_ADULT.Text.Length == 0)
            {
                TXT_ADULT.Focus();
                MSGBOX mdg = new MSGBOX(MessageAlertHeder.Alert(), "PLEASE ENTER NO OF ADULTS!", MessageAlertImage.Alert());
                mdg.ShowDialog();
            }

            else if (CMB_RESERVE_BY.SelectedIndex == -1)
            {
                CMB_RESERVE_BY.Focus();
                MSGBOX mdg = new MSGBOX(MessageAlertHeder.Alert(), "PLEASE SELECT RESERVATION TYPE!", MessageAlertImage.Alert());
                mdg.ShowDialog();
            }
            else if (CMB_RESERVE_BY.SelectedIndex == 3 && CMB_AGENT.SelectedIndex == -1)
            {
                CMB_RESERVE_BY.Focus();
                MSGBOX mdg = new MSGBOX(MessageAlertHeder.Alert(), "PLEASE SELECT AGENT!", MessageAlertImage.Alert());
                mdg.ShowDialog();
            }
            else if (LST_SELECTED_ROOM.Items.Count == 0)
            {
                MSGBOX mdg = new MSGBOX(MessageAlertHeder.Alert(), "PLEASE SELECT ROOMS!", MessageAlertImage.Alert());
                mdg.ShowDialog();
            }
            else if (Convert.ToInt16(TXT_NO_OF_NIGHTS.Text) == 0)
            {
                MSGBOX mdg = new MSGBOX(MessageAlertHeder.Alert(), "PLEASE SELECT SPEND DATES!", MessageAlertImage.Alert());
                mdg.ShowDialog();
            }
            else if (CMB_TAX.SelectedIndex == -1)
            {
                MSGBOX mdg = new MSGBOX(MessageAlertHeder.Alert(), "PLEASE SELECT TAX TYPE!", MessageAlertImage.Alert());
                mdg.ShowDialog();
            }
            else if (CMB_AGENT.SelectedIndex > -1 && CMB_AGENT.SelectedIndex == -1)
            {
                MSGBOX mdg = new MSGBOX(MessageAlertHeder.Alert(), "PLEASE SELECT AGENT!", MessageAlertImage.Alert());
                mdg.ShowDialog();
            }

            else
            {
                BTN_SAVE.Enabled = false;
                SAVE_RESERVATION();
                BTN_NEW.Focus();
            }
        }