protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            try
            {
                if (Session[Constants.userId].ToString() != null || Session[Constants.userId].ToString() != "")
                {
                    lblUserId.Text = Session[Constants.userId].ToString();
                }
                else
                {
                    throw new NullReferenceException();
                }
                lblUserId.Visible         = false;
                Session[Constants.userId] = lblUserId.Text;

                BloodBL       bl     = new BloodBL();
                List <string> states = bl.GetStateFromHospitalById(int.Parse(lblUserId.Text));
                ddlState.DataSource = states;
                ddlState.DataBind();
                ddlState.Items.Insert(0, "Select State");
            }
            catch (Exception ee)
            {
                Response.Write("<script>alert('Your session expired...Please login again');window.location.href='HomePageBeforeLogin.aspx'</script>");
            }
        }
    }