private void cmb_MaSP_SelectedIndexChanged(object sender, EventArgs e) { txt_TenSP.Text = SP.TenSP(cmb_MaSP.SelectedValue.ToString()); txt_LoaiSP.Text = SP.LoaiSP(cmb_MaSP.SelectedValue.ToString()); txt_ThongTinSP.Text = SP.ThongTin(cmb_MaSP.SelectedValue.ToString()); txt_GiaBan.Text = SP.GiaBan(cmb_MaSP.SelectedValue.ToString()); txt_NCC.Text = SP.NhaCC(cmb_MaSP.SelectedValue.ToString()); txt_BaoHanh.Text = SP.BaoHanh(cmb_MaSP.SelectedValue.ToString()); }