protected void Button1_Click(object sender, EventArgs e) { int id = Convert.ToInt32(txtReschedule.Text); try { var res = b.CheckTicketID(id); if (res == false) { Response.Write("Invalid Ticket ID"); txtReschedule.Text = ""; } else { Session["TicketID"] = Convert.ToInt32(id); Response.Redirect("UpdateTicket.aspx"); } } catch (Exception ex) { throw ex; } }