WPF多线程出现UI卡顿，求救！！！

[mylibin]

第一次用WPF，被多线程搞死了。写的代码出现了UI卡顿现象，求解救。多线程是从网上找的代码，和WInform用法，完成不同。是不是写的不对，求帮助。

int MaxID = 0;
        int MinID = 0;
        Thread oldThread;
        Thread newThread;
        DataTable all = new DataTable();
        public MainWindow()
        {
            InitializeComponent();
            //this.Title = GetApp.GetValue("Title");
            oldThread = new Thread(new ThreadStart(OldDispatcherThread));
            oldThread.IsBackground = true;
            newThread = new Thread(new ThreadStart(NewDispatcherThread));
            newThread.IsBackground = true;
        }
        
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            //拉取当前10条数据
            bindInit();

            //获取老信息
            oldThread.Start();
            newThread.Start();
        }
        public void OldDispatcherThread()
        {
            //可以通过循环条件来控制UI的更新
            while (true)
            {
                ///线程优先级，最长超时时间，方法委托（无参方法）
                listBox1.Dispatcher.Invoke(DispatcherPriority.Normal, TimeSpan.FromSeconds(1), new Action(NextData));
                Thread.Sleep(3000);
            }
        }
        public void NewDispatcherThread()
        {
            //可以通过循环条件来控制UI的更新
            while (true)
            {
                ///线程优先级，最长超时时间，方法委托（无参方法）
                listBox1.Dispatcher.Invoke(DispatcherPriority.Normal, TimeSpan.FromSeconds(1), new Action(PreData));
                Thread.Sleep(3000);
            }
        }
        private void NextData()
        {
            bindData("info_id<" + MaxID, 2);
        }
        private void PreData()
        {
            
        }

        private void bindInit()
        {
           //执行这个方法的时候，开始出现UI卡顿现象
            string backStr = api.GetALLWLInfoData("", 10);
            if (backStr != "")
            {
                all = GetSerializable(backStr) as DataTable;
            }
            if (all != null && all.Rows.Count > 0)
            {
                MaxID = int.Parse(all.Rows[all.Rows.Count - 1]["info_id"].ToString());
                MinID = int.Parse(all.Rows[0]["info_id"].ToString());

                listBox1.DataContext = all;
            }
        }

        private void bindData(string filter,int source)
        {
            string backStr = api.GetALLWLInfoData(filter, 10);
            DataTable dt = new DataTable();
            if (backStr != "")
            {
                dt = GetSerializable(backStr) as DataTable;
            }
            if (dt != null && dt.Rows.Count > 0)
            {
                switch (source)
                {
                    case 1:
                        MinID = int.Parse(all.Rows[0]["info_id"].ToString());
                        break;
                    case 2:
                        MaxID = int.Parse(all.Rows[all.Rows.Count - 1]["info_id"].ToString());
                        foreach (DataRow dr in dt.Rows)
                            all.ImportRow(dr);
                        //没有老数据，关闭拉取老数据进程
                        if (dt.Rows.Count == 0)
                            oldThread.Abort();
                        break;
                    default:
                        break;
                }
                //listBox1.DataContext = all; 
            }
        }

        /// <summary>
        /// 对象反序列化
        /// </summary>
        /// <param name="str">序列化字符串</param>
        /// <returns></returns>
        public object GetSerializable(string str)
        {
            IFormatter formatter = new BinaryFormatter();
            byte[] buffer = Convert.FromBase64String(str);
            MemoryStream stream = new MemoryStream(buffer);
            object obj = formatter.Deserialize(stream);
            stream.Flush();
            stream.Close();

            return obj;
        }

[exception92]

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