public void DataLoad()
        {
            dbKH     = new DBKhachHang();
            dbLoaiKH = new DBLoaiKhachHang();

            dgvDanhMucKhachHang.DataSource = dbKH.GetAllCustomer();
            dgvDanhMucKhachHang.Columns["HoaDons"].Visible = false;
            dgvDanhMucKhachHang.Columns["LoaiKH"].Visible  = false;


            foreach (DataGridViewRow row in dgvDanhMucKhachHang.Rows)
            {
                row.HeaderCell.Value = (row.Index + 1).ToString();
            }
            dgvDanhMucKhachHang.AutoResizeRowHeadersWidth(DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders);

            cmMaLoaiKH.DataSource    = dbLoaiKH.GetAllLoaiKH();;
            cmMaLoaiKH.DisplayMember = "TenLoaiKH";
            cmMaLoaiKH.ValueMember   = "MaLoaiKH";

            DataBind();

            cmCotTimKiem.DataSource = new string[] { "TenKH", "MaKH", "DiaChi", "SDT", "GioiTinh", "NgaySinh", "MaLoaiKH" };

            if (dgvDanhMucKhachHang.Rows.Count == 0)
            {
                btnXoa.Enabled = false;
            }
        }
        private void DataLoad()
        {
            dbLoaiKH = new DBLoaiKhachHang();
            dgvDanhMucLoaiKH.DataSource = dbLoaiKH.GetAllLoaiKH();
            dgvDanhMucLoaiKH.Columns["KhachHangs"].Visible = false;
            foreach (DataGridViewRow row in dgvDanhMucLoaiKH.Rows)
            {
                row.HeaderCell.Value = (row.Index + 1).ToString();
            }
            dgvDanhMucLoaiKH.AutoResizeRowHeadersWidth(DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders);

            cmCotTimKiem.DataSource = new string[] { "MaLoaiKH", "TenLoaiKH", "ChietKhau" };
            DataBind();
        }