public void Button6_Click(object sender, EventArgs e) { AdminDataManager ADMgr = new AdminDataManager(); int itineraryID = -1; int attractionID = -1; bool doit = true; int returnresult = -1; try { itineraryID = Int32.Parse(this.TextBox13.Text); attractionID = Int32.Parse(this.TextBox14.Text); if (itineraryID < 1 || attractionID < 1) { doit = false; } } catch (Exception) { doit = false; } if (doit) { returnresult = ADMgr.deleteItineraryDoList(itineraryID, attractionID); DataTable dt = ADMgr.getItineraryDoList(); GridView3.DataSource = dt; GridView3.DataBind(); if (returnresult < 1) { this.TextBox15.Text = "Failure to delete. Please try again."; } else { this.TextBox15.Text = "Deleted successfully."; } } }