private void btn_Delete_RoomType_Click(object sender, EventArgs e)
        {
            BLRoomType blRT = new BLRoomType();

            blRT.DeleteRoomType(txt_RoomType_RoomTypeID.Text);
            dgv_RoomType.DataSource = blRT.LoadRoomType();
            dgv_RoomType_CellClick(null, null);
        }
        private void btn_Save_RoomType_Click(object sender, EventArgs e)
        {
            BLRoomType blRT = new BLRoomType();

            if (SaveStatus == 1)
            {
                blRT.CreateRoomType(txt_RoomType_RoomTypeName.Text, txt_RoomType_Price.Text);
            }
            else if (SaveStatus == 2)
            {
                blRT.UpdateRoomType(Convert.ToInt32(txt_RoomType_RoomTypeID.Text), txt_RoomType_RoomTypeName.Text, txt_RoomType_Price.Text);
            }
            SaveStatus = 0;
            dgv_RoomType.DataSource = blRT.LoadRoomType();
            dgv_RoomType_CellClick(null, null);
            btn_Update_RoomType.Enabled = true;
            btn_Create_RoomType.Enabled = true;
            btn_Save_RoomType.Enabled   = false;
        }
        private void btn_RoomType_Click(object sender, EventArgs e)
        {
            TabControl_Main.TabPages.Clear();
            TabControl_Main.TabPages.Add(TabPage_RoomType);
            dgv_RoomType.AutoResizeColumns();
            BLRoomType dbRT = new BLRoomType();
            var        data = dbRT.LoadRoomType();

            if (data != null)
            {
                dgv_RoomType.DataSource = data;
            }
            else
            {
                dgv_RoomType.DataSource = null;
            }
            dgv_RoomType_CellClick(null, null);
            txt_RoomType_RoomTypeID.Enabled = false;
        }