Unable to add item to my sharepoint list

Question

I try to add an item to my sharepoint list from a custom web part. Is there any mistake in my code?

[WebMethod]
        public static string AjouterDemande()
        {
            SPList ListeDemandeConge = SPContext.Current.Site.RootWeb.Lists["DEMANDE CONGÉ"];
            SPListItem ListItem = ListeDemandeConge.Items.Add();
            ListItem["CODE"] = code;
            ListItem["DEMANDEUR"] = Utilisateur.LoginName;
            ListItem["DATE DEMANDE"] = DateTime.Today.Date;
            ListItem["DATE FIN"] = EndDateD;
            ListItem["DATE DEPART"] = StartDateD;
            ListItem["DUREE"] = int.Parse(DayCount);
            ListItem["PREMIER RESPONSABLE"] = Employe.FirstSuperior.LoginName;
            ListItem["DEUXIEME RESPONSABLE"] = Employe.SecondSuperior.LoginName;
            ListItem["PRESENCE PRES"] = Boolean.Parse(FirstRespPresent);
            ListItem["SOLDE CONGE"] = Conge.SoldeAnneeConge;
            ListItem["MOIS"] = int.Parse(StartDateTab[1]);
            ListItem["ANNEE"] = int.Parse(StartDateTab[0]);
            ListItem["JOURS APPROUVEES"] = 0;
            ListItem.Update();
            ListeDemandeConge.Update();
            return "true";

        }

When I use F10 to process debugging step by step and get to my listitem.update(), it went out without giving any error.

Answer 1

Try SPList.AddItem instead of Items.Add

However, I can't figure out why your code is not working! Below are some links for your reference

List.AddItem() and List.Item.Add() … why two methods for same purpose SPList.Add() vs SPList.AddItem() SharePoint 2010