PeopleEditor的取值及赋值

        /// <summary>
        /// 从PeopleEditor取值
         /// </summary>
        /// <param name="peopleEditor"></param>
        /// <returns></returns>
        public static List<SPPrincipal> GetSPPrincipalsFromPeopleEditor(PeopleEditor peopleEditor)
        {

            List<SPPrincipal> rtn = new List<SPPrincipal>();
            SPWeb web = SPContext.Current.Web;
            SPUserCollection users = web.SiteUsers;
            SPGroupCollection groups = web.SiteGroups;

            foreach (PickerEntity pe in peopleEditor.ResolvedEntities)
            {
                string principalType = pe.EntityData["PrincipalType"].ToString();
                if (principalType == "User" || principalType == "SecurityGroup")
                {
                    string loginName=pe.Key;
                    foreach (SPUser u in users)
                    {
                        if (u.LoginName == loginName)
                        {
                            rtn.Add(u);
                            break;
                        }
                    }
                        
                }
                else if (principalType == "SharePointGroup")
                {
                    string groupName = pe.Key;
                    foreach (SPGroup g in groups)
                    {

                        if (g.Name == groupName)
                        {

                            rtn.Add(g);
                            break;
                        }
                    }
                }
            }

            return rtn;
        }

        /// <summary>
        /// 为PeopleEditor赋值
         /// </summary>
        /// <param name="peopleEditor"></param>
        /// <param name="spPrincipals"></param>
        public static void SetPeopleEditorValue(PeopleEditor peopleEditor, List<SPPrincipal> spPrincipals)
        {
            string principalsStr;
            if (spPrincipals==null || spPrincipals.Count == 0)
                principalsStr = "";
            else
            {
                List<string> principalsStrCollection = new List<string>();
                foreach (SPPrincipal principal in spPrincipals)
                {
                    SPUser user = principal as SPUser;
                    SPGroup group = principal as SPGroup;
                    if (user != null || group != null)
                        principalsStrCollection.Add(principal.Name);
                }
                principalsStr = string.Join(",", principalsStrCollection.ToArray());
            }
            peopleEditor.CommaSeparatedAccounts = principalsStr;
        }