private void frm_capnhat_docgia_Load(object sender, EventArgs e) { load_data(); List <how_to_search> dt_source = new List <how_to_search>(); dt_source.Add(new how_to_search("Số phiếu mượn", "sophieumuon")); dt_source.Add(new how_to_search("Độc giả", "docgia")); cbx_option_search.DataSource = dt_source; cbx_option_search.DisplayMember = "value"; cbx_option_search.ValueMember = "key"; docgia_ctrl docgia = new docgia_ctrl(); nhanvien_ctrl nhanvien = new nhanvien_ctrl(); var data_docgia = docgia.select_all_docgia(); switch (data_docgia.errcode) { case ErrorCode.NaN: break; case ErrorCode.sucess: cbx_docgia.DisplayMember = "tendocgia"; cbx_docgia.ValueMember = "madocgia"; cbx_docgia.DataSource = data_docgia.data; cbx_docgia.SelectedIndex = -1; break; case ErrorCode.fail: break; default: break; } var data_nhanvien = nhanvien.select_all_nhanvien(); switch (data_nhanvien.errcode) { case ErrorCode.NaN: break; case ErrorCode.sucess: cbx_nhanvien.DisplayMember = "tennhanvien"; cbx_nhanvien.ValueMember = "manhanvien"; cbx_nhanvien.DataSource = data_nhanvien.data; cbx_nhanvien.SelectedIndex = -1; break; case ErrorCode.fail: break; default: break; } dtgv_sachmuon.Rows[0].Cells[0].Selected = true; }