private void cboLoaiCTu_TextChanged(object sender, EventArgs e) { _KTLCTGRepo = new KTLCTGRepo(); var list = _KTLCTGRepo.GetAllToList(); AutoCompleteStringCollection auto1 = new AutoCompleteStringCollection(); foreach (var item in list) { auto1.Add(item.ID_LOAI); } cboLoaiCTu.AutoCompleteMode = AutoCompleteMode.SuggestAppend; cboLoaiCTu.AutoCompleteSource = AutoCompleteSource.CustomSource; cboLoaiCTu.AutoCompleteCustomSource = auto1; }