protected void OnApplyFilter(object sender, EventArgs e)
        {
            var isSelectAll        = CategoryFilter.CheckIfSelectedAll();
            var selectedCategories = isSelectAll ? null : CategoryFilter.GetSelectedValues();
            var partnerName        = FilterName.Text;

            LoadTips(selectedCategories, partnerName);

            uxTips_Ru.DataBind();
            uxTips_Eng.DataBind();

            chkbx_selectAll.Checked = isSelectAll;
        }