无法在列表视图 Windows Phone 8.1 中获取实时数据进行更新

Question

由于某种原因，这个程序没有从 parse.com 返回实时数据，它只是在我退出应用程序时返回正确的数据，我需要从解析中检索数据，例如，如果有人更改了解析中的数据，则其反映在该应用程序

public async Task<List<MagicLists>> GetListsAync()
{
    var query = ParseObject.GetQuery("lists");
    IEnumerable<ParseObject> result = new List<ParseObject>();
    try
    {
        result = await query.FindAsync();
    }
    catch (Exception) { }

    var listItems = new List<MagicLists>();
    foreach (var listItemParseObject in result)
    {
        var listItem = await MagicLists.CreateFromParseObject(listItemParseObject);
        listItems.Add(listItem);
    }
    return listItems;
 }

我的清单如下，我不明白为什么它不只是得到

using Parse;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Threading.Tasks;

namespace MagicLists.DataModel
{
    public class MagicLists : INotifyPropertyChanged
    {
        public MagicLists() { }

        public MagicLists(String uniqueId, String title, String subtitle, String imagePath, String description, String content, string type)
        {
            this.UniqueId = uniqueId;
            this.Title = title;
            this.Subtitle = subtitle;
            this.Description = description;
            this.ImagePath = imagePath;
            this.Content = content;
            this.Type = type;
        }


        public MagicLists(String uniqueId, String title, String subtitle, String imagePath, String description, String content, bool unread, Int32 status)
        {
            UniqueId = uniqueId;
            Title = title;
            Subtitle = subtitle;
            Description = description;
            ImagePath = imagePath;
            Content = content;
            Unread = unread;
            Status = status;
        }

        private bool _unread;
        private string _title;
        public string UniqueId { get; private set; }
        public string Title
        {
            get { return _title; }
            set
            {
                _title = value;
                NotifyPropertyChanged("Title");
            }
        }
        public string Subtitle { get; private set; }
        public string Description { get; private set; }
        public string ImagePath { get; private set; }
        public string Content { get; private set; }
        public int Status { get; private set; }
        public string Type { get; private set; }

        public string ViewToUse { get; private set; }
        public bool Unread
        {
            get { return _unread; }
            set
            {
                _unread = value;
                NotifyPropertyChanged("Unread");
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;

        private void NotifyPropertyChanged(String info)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(info));
            }
        }

        public static async Task<MagicLists> CreateFromParseObject(ParseObject parseObject)
        {
            return await Task.Run<MagicLists>(() =>
            {
                var mlist = new MagicLists();

                mlist.Title = parseObject.ObjectId;
                if (parseObject.ContainsKey("name"))
                {
                    mlist.Title = (string)parseObject["name"];
                }


                if (parseObject.ContainsKey("description"))
                {
                    mlist.Description = (string)parseObject["description"];
                }
                if (parseObject.ContainsKey("image"))
                {
                    mlist.ImagePath = (string)parseObject["image"];
                }


                if (parseObject.ContainsKey("type"))
                {
                    string mtype = (string)parseObject["type"];

                    if (mtype == "N")

                    {
                        mlist.Type = "Notes";
                        mlist.ViewToUse = "Notes.Xaml";
                    }
                }
                return mlist;
            });
        }
    }
}

在我的列表视图刷新中，我正在执行以下操作

private async Task LstView_OnPullToRefreshRequested(object sender, EventArgs e)
{
    lstView.ItemsSource = null;
    List<DataModel.MagicLists> mLists;
    mLists = await _db.GetListsAync();

    lstView.ItemsSource = mLists;
}

但是它只是带回旧数据而不是解析中调整后的数据？.

Answer 1

以防万一其他人发现这确实是 Windows Phone 8.1 的解析 sdk 中的一个错误，并且已在下一个版本中修复，正如他们在我原来的错误跟踪器中所说的那样。

https://developers.facebook.com/bugs/1485207861770147/