void btnAddNewProdCal_Click(object sender, EventArgs e)
        {
            btnAddNewProdCal.Visible = false;
            pnlEditProdCal.Visible   = true;
            pnlProdCalList.Visible   = false;

            ProdCalendar1.Clear();
        }
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                string CalendarID = string.Empty;
                if (Request.QueryString.AllKeys.Contains("CalendarId"))
                {
                    CalendarID = Request.QueryString["CalendarId"].ToString();
                }
                if (!string.IsNullOrEmpty(CalendarID))
                {
                    CurrentCalendarId.Value = CalendarID;
                    int menuItemId = Convert.ToInt32(CalendarID);

                    ProdCalendar1.PrimaryKeyIndex = menuItemId;
                    ProdCalendar1.Bind();
                    btnAddNewProdCal.Visible = false;
                    pnlEditProdCal.Visible   = true;
                    pnlProdCalList.Visible   = false;
                }

                //BindgvwProdCalendars();
            }
        }