线程在WPF中的使用

项目中可能会有这样的需求，一直获取新的某个数据信息，但仍不影响其他的操作功能，这时就用到了线程，获取新数据放到线程中操作，对其他操作不产生影响，下面就以随机获取数组中项为例解说WPF中使用线程这一实例：
在WPF窗体程序中拖三个Button 两个操作按钮，一个启动按钮。后台代码：

  public delegate void GetSetNumber();//
        bool IsContinue = true;
        public ThreadModel()
        {
            InitializeComponent();
        }
        //启动
        private void butStart_Click(object sender, RoutedEventArgs e)
        { 
            if (IsContinue)
            {
                IsContinue = false;
                button1.Content = "停止（Stop）";
                button1.Dispatcher.BeginInvoke(DispatcherPriority.Normal, new GetSetNumber(GetNewNumber));//利用委托异步调用
            }
            else
            {
                IsContinue = true;
                button1.Content = "继续（Continue）";
            }
        }
        private void GetNewNumber()
        {
                string[] ss = null;
                int hour = DateTime.Now.Hour;
                if (hour >= 10 && hour <= 13)
                {
                    label1.Content = "还在为中午吃什么发愁吗，来点击看看……";
                    ss = new string[]{"面条","米线","米饭", "盖饭", "土豆粉" ,"炒饭", "炒面", "饼","粥","包子","饺子","小碗","砂锅", "泡面", "热干面" ,"酸辣粉", "麻辣烫"
                          };
                }
                else
                {
                    label1.Content = "公平公正的点名";
                    ss = new string[]{ "向颗","果露","王金兰", "贺玲", "贾群" ,"刘蕴涵", "郭凤熙", "宋经曌","布茜","王玉","单茹","李兒","张萨", "李思", "王武" ,"兰琉", "田琪", "杨霸","胡玖","邓穆",
                          "张红","王丽","郑兰", "郭青", "李路" ,"胡明", "襄阳", "杨洋","钢蛋","邓古",
                          };
                }
                //随机取数组中的值
                Random random = new Random();
                int index = random.Next(ss.Count());
                string number = ss[index];
                textBox1.Text = number;
                //递归调用若不使用线程将进入死循环
                if (!IsContinue)
                {
                    button1.Dispatcher.BeginInvoke(
                        System.Windows.Threading.DispatcherPriority.SystemIdle,
                        new GetSetNumber(this.GetNewNumber));
                }
        }
        //操作1
        private void butOperate1_Click(object sender, RoutedEventArgs e)
        {
            MessageBox.Show("我弹出来了！"); 
        }
        //操作2
        private void butOperate2_Click(object sender, RoutedEventArgs e)
        {
            MessageBox.Show("噢噢噢也");
        }