private void BindData()
        {
            Envelops envelops = new Envelops();
            envelops.LoadAll();

            PagedDataSource pds = new PagedDataSource();
            pds.DataSource = envelops.DefaultView;
            pds.AllowPaging = true;
            pds.PageSize = 12;
            pds.CurrentPageIndex = currentPage;
            uiRepeaterEnvelops.DataSource = pds;
            uiRepeaterEnvelops.DataBind();
            uiLinkButtonPrev.Enabled = true;
            uiLinkButtonNext.Enabled = true;
            if (currentPage == 0)
            {
                uiLinkButtonPrev.Enabled = false;
            }

            if (currentPage == (pds.PageCount - 1))
            {
                uiLinkButtonNext.Enabled = false;
            }
        }
 private void BindCats()
 {
     Envelops env = new Envelops();
     env.LoadAll();
     uiGridViewEnvelops.DataSource = env.DefaultView;
     uiGridViewEnvelops.DataBind();
 }