PeoplePickerRemediation.Console.ContentIterator.ProcessListItem C# (CSharp) Method

        public void ProcessListItem(string listName, CamlQuery camlQuery, ItemProcessor itemProcessor,ref List<PeoplePickerListOutput> lstPeoplepickeroutput, ItemProcessorErrorCallout errorCallout)
        {
            List list = _context.Web.Lists.GetByTitle(listName);
            CamlQuery query = camlQuery;

            //EventReceiverDefinitionCollection erCollection = list.EventReceivers;
            //foreach(EventReceiverDefinition erDefinition in erCollection)
            //{
            //    erDefinition.
            //}
            ListItemCollectionPosition position = null;
            query.ListItemCollectionPosition = position;

            while (true)
            {
                ListItemCollection listItems = list.GetItems(query);
                _context.Load(listItems, items => items.ListItemCollectionPosition);
                _context.ExecuteQuery();

                for (int i = 0; i < listItems.Count; i++)
                {
                    try
                    {
                        itemProcessor(listItems[i], _context, ref lstPeoplepickeroutput);

                    }
                    catch (System.Exception ex)
                    {
                        if (errorCallout == null || errorCallout(listItems[i], ex))
                        {
                            throw;
                        }
                    }

                }

                if (listItems.ListItemCollectionPosition == null)
                {
                    return;
                }
                else
                {
                    /*if query contains lookup column filter last batch returns null
                     by removing the lookup column in paginginfo query will return next records
                     */
                    string pagingInfo = listItems.ListItemCollectionPosition.PagingInfo;
                    string[] parameters = pagingInfo.Split(new char[] { '&' }, StringSplitOptions.RemoveEmptyEntries);
                    List<string> requiredParameters = new List<string>();
                    foreach (string str in parameters)
                    {
                        if (str.Contains("Paged=") || str.Contains("p_ID="))
                            requiredParameters.Add(str);
                    }

                    pagingInfo = string.Join("&", requiredParameters.ToArray());
                    listItems.ListItemCollectionPosition.PagingInfo = pagingInfo;
                    query.ListItemCollectionPosition = listItems.ListItemCollectionPosition;
                }

            }
        }

        public static void ReadFormLibUsingAppOnlyAndCredentials(PeoplePickerListsInput formLib, ref List <PeoplePickerListOutput> lstPeoplepickeroutput)
        {
            if (formLib == null)
            {
                return;
            }

            webUrl   = formLib.WebUrl;
            listName = formLib.ListName;


            Logger.LogInfoMessage(String.Format("Processing PeoplePicker Form Library [{0}] of Web [{1}] ...", listName, webUrl), true);

            CamlQuery camlQuery = new CamlQuery();

            //Set View Scope for the Query
            camlQuery.SetViewAttribute(QueryScope.RecursiveAll);
            //Or Set the ViewFields xml
            //camlQuery.SetViewFields(@"<FieldRef Name='ID'/><FieldRef Name='Title'/>");
            //Override the QueryThrottle Mode for avoiding ListViewThreshold exception
            camlQuery.SetQueryThrottleMode(QueryThrottleMode.Override);
            //Use OrderBy ID field if Query doesn't have filter with indexed column
            camlQuery.SetOrderByIDField();
            //Set RowLimit
            camlQuery.SetQueryRowlimit(Convert.ToUInt32(ConfigurationManager.AppSettings["CamlQueryRowLimit"]));
            PeoplePickerListOutput peoplePickerOutput = new PeoplePickerListOutput();

            peoplePickerOutput.WebUrl   = webUrl;
            peoplePickerOutput.ListName = formLib.ListName;
            try
            {
                using (ClientContext userContext = Helper.CreateClientContextBasedOnAuthMode(Program.UseAppModel, Program.AdminDomain, Program.AdminUsername, Program.AdminPassword, webUrl))
                {
                    List list = userContext.Web.Lists.GetByTitle(listName);
                    userContext.Load(list);
                    userContext.Load(list.EventReceivers);
                    userContext.Load(list.WorkflowAssociations);
                    userContext.ExecuteQuery();

                    bool updateXmlIfEventReceiversNotFound = true;
                    bool updateXmlIfWorkflowsNotFound      = true;

                    if (list.EventReceivers.Count > 0)
                    {
                        if (ConfigurationManager.AppSettings["UpdateUserInfoEvenIfEventReceiversEnabled"].ToString().Equals("No"))
                        {
                            updateXmlIfEventReceiversNotFound = true;
                            Logger.LogInfoMessage(String.Format("EventReceivers are associated with List [{0}] of Web [{1}] and permission is not given to update user info", listName, webUrl), true);
                        }
                    }

                    if (list.WorkflowAssociations.Count > 0)
                    {
                        if (ConfigurationManager.AppSettings["UpdateUserInfoEvenIfWorkflowsEnabled"].ToString().Equals("No"))
                        {
                            updateXmlIfWorkflowsNotFound = true;
                            Logger.LogInfoMessage(String.Format("Workflows are associated with List [{0}] of Web [{1}] and permission is not given to update user info", listName, webUrl), true);
                        }
                    }

                    if (updateXmlIfEventReceiversNotFound && updateXmlIfWorkflowsNotFound)
                    {
                        // TODO: uncomment below lines to switch read-only property
                        //PeoplePickerEdiorModified modified = new PeoplePickerEdiorModified();
                        //UpdateEditorAndModifiedFieldsProperty(userContext, list, listName, ref modified, false);

                        ContentIterator contentIterator = new ContentIterator(userContext);
                        try
                        {
                            contentIterator.ProcessListItem(listName, camlQuery,
                                                            ProcessItem, ref lstPeoplepickeroutput,
                                                            delegate(ListItem item, System.Exception ex)
                            {
                                return(true);
                            });

                            Logger.LogInfoMessage("Total :" + totalCount, true);
                        }
                        catch (Exception ex)
                        {
                            Logger.LogErrorMessage(ex.Message);
                        }

                        // TODO: uncomment below lines to switch read-only property
                        //if (modified.isEditorfieldModified || modified.isModifiedFieldModified)
                        //{
                        //    UpdateEditorAndModifiedFieldsProperty(userContext, list, listName, ref modified, true);
                        //}
                    }
                }
            }
            catch (Exception ex)
            {
                Logger.LogErrorMessage(String.Format("ReadFormLibUsingAppOnlyAndCredentials() failed for PeroplePicker InfoPath Library [{0}] of Web [{1}]: Error={2}", listName, webUrl, ex.Message), true);
                peoplePickerOutput.Status       = Constants.ErrorStatus;
                peoplePickerOutput.ErrorDetails = ex.Message;
                lstPeoplepickeroutput.Add(peoplePickerOutput);
            }
        }