protected void btnOfferHistory_Click(object sender, EventArgs e)
{
int aid;
if (int.TryParse(Request.QueryString["aid"], out aid))
{
TravelAgencyService service = new TravelAgencyService();
using (service.ToDisposable())
{
int?offerId = service.GetOfferHistoryIdByAttractionId(aid);
if (offerId.HasValue)
{
Response.Redirect(String.Format("/Logged/OfferHistoryDetails?oid={0}", offerId.Value));
}
}
}
}