private void btnXoa_Click(object sender, EventArgs e)
{
QuanLyBanHangDataContext db = new QuanLyBanHangDataContext();
KhachHang xoaKhachHangTheoMaKH = db.KhachHangs.Single(kh => kh.MaKH.Equals(txtMaKH.Text.Trim()));
db.KhachHangs.DeleteOnSubmit(xoaKhachHangTheoMaKH);
db.SubmitChanges();
HienThi();
}
private void btnSua_Click(object sender, EventArgs e)
{
QuanLyBanHangDataContext db = new QuanLyBanHangDataContext();
KhachHang capNhatKhachHangTheoMaKH = db.KhachHangs.Single(kh => kh.MaKH.Equals(txtMaKH.Text.Trim()));
capNhatKhachHangTheoMaKH.TenKH = txtTenKH.Text.Trim();
capNhatKhachHangTheoMaKH.DiaChi = txtDiaChi.Text.Trim();
capNhatKhachHangTheoMaKH.Sdt = txtSDT.Text.Trim();
db.SubmitChanges();
HienThi();
}
private void btnThem_Click(object sender, EventArgs e)
{
QuanLyBanHangDataContext db = new QuanLyBanHangDataContext();
KhachHang khachHangMoi = new KhachHang();
khachHangMoi.MaKH = txtMaKH.Text.Trim();
khachHangMoi.TenKH = txtTenKH.Text.Trim();
khachHangMoi.DiaChi = txtDiaChi.Text.Trim();
khachHangMoi.Sdt = txtSDT.Text.Trim();
db.KhachHangs.InsertOnSubmit(khachHangMoi);
db.SubmitChanges();
HienThi();
}
