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; }