private void timKiem()
{
sKeyword = txtSearch.Text.Trim();
// List<KhachHangDTO> ListKhachHang = khachHangBUS.getListKhachHangByKey(sKeyword);
DataTable dataHang = hangBUS.GetDataTableHangByKey(sKeyword);
if (sKeyword == null || sKeyword == string.Empty || sKeyword.Length == 0)
{
this.loadDanhSachHang();
}
else
{
dataGridViewHang.DataSource = dataHang;
dataGridViewHang.Refresh();
dataGridViewHang.Update();
}
}