private void btnTimKiem_Click(object sender, EventArgs e) { DataTable dtTimKiemKhachHang = new DataTable(); if (cboTimKiem.EditValue as string == "Mã khách hàng") { string timkiem = string.Format("MAKH LIKE N'%{0}%'", txtTimKiem.EditValue); dtTimKiemKhachHang = khControl.getAllDataSeach(timkiem); gcTimKiemKhachHang.DataSource = dtTimKiemKhachHang; } else if (cboTimKiem.EditValue as string == "Tên khách hàng") { string timkiem = string.Format("TENKH LIKE N'%{0}%'", txtTimKiem.EditValue); dtTimKiemKhachHang = khControl.getAllDataSeach(timkiem); gcTimKiemKhachHang.DataSource = dtTimKiemKhachHang; } }