public void Button5_Click(object sender, EventArgs e)
        {
            AdminDataManager ADMgr = new AdminDataManager();
            int  itineraryID       = -1;
            bool doit         = true;
            int  returnresult = -1;

            try
            {
                itineraryID = Int32.Parse(this.TextBox12.Text);
                if (itineraryID < 1)
                {
                    doit = false;
                }
            }
            catch (Exception)
            {
                doit = false;
            }
            if (doit)
            {
                returnresult = ADMgr.deleteItinerary(itineraryID);
                DataTable dt = ADMgr.getItinerary();
                GridView2.DataSource = dt;
                GridView2.DataBind();
                if (returnresult < 1)
                {
                    this.TextBox15.Text = "Failure to delete. Please try again.";
                }
                else
                {
                    this.TextBox15.Text = "Deleted successfully.";
                }
            }
            else
            {
                this.TextBox15.Text = "Error Encountered. Please try again.";
            }
        }