protected void dropTinhtrang_SelectedIndexChanged(object sender, EventArgs e)
{
int trangthai = int.Parse(dropTinhtrang.SelectedValue.ToString());
//show list Service bank
gvDSBank.DataSource = ServiceBankBUS.LayDanhSachServiceBank(trangthai);
gvDSBank.DataBind();
//reset
gvDSBank.SelectedIndex = -1;
}
