private void cmbMaSDDVu_SelectedIndexChanged(object sender, EventArgs e) { DanhSachSuDungDichVuControl dsdvctrl = new DanhSachSuDungDichVuControl(); if (cmbMaSDDVu.SelectedValue != null) { QUANLYKHACHSAN.BusinessObject.DanhSachSuDungDichVuInFo dsi = dsdvctrl.LayDSSuDungDVu(cmbMaSDDVu.SelectedValue.ToString()); int solg = dsi.SoLuong; DichVuControl dvctrl = new DichVuControl(); QUANLYKHACHSAN.BusinessObject.DichVuInFo dvi = dvctrl.LayMaDichVu(dsi.MaDichVu); float dongia = dvi.DonGia; float tien = solg * dongia; txtTienDVu.Text = tien.ToString(); } }
private void frmTimMaSuDungDVu_Load(object sender, EventArgs e) { DanhSachSuDungDichVuControl ds = new DanhSachSuDungDichVuControl(); ds.HienthiComboBoxMaSuDung(cmbmaSuDung); }