WP7 BackgroundWorker线程

        private BackgroundWorker _bw_1;
        private BackgroundWorker _bw_2;

        public Page2()
        {
            InitializeComponent();

            _bw_1 = new BackgroundWorker();
            _bw_1.DoWork+=new DoWorkEventHandler(_bw_1_DoWork);
            _bw_1.ProgressChanged+=new ProgressChangedEventHandler(_bw_1_ProgressChanged);
            _bw_1.RunWorkerCompleted+=new RunWorkerCompletedEventHandler(_bw_1_RunWorkerCompleted);
            _bw_1.WorkerReportsProgress = true;
            _bw_1.RunWorkerAsync();

            _bw_2 = new BackgroundWorker();
            _bw_2.DoWork += new DoWorkEventHandler(_bw_2_DoWork);
            _bw_2.ProgressChanged += new ProgressChangedEventHandler(_bw_2_ProgressChanged);
            _bw_2.RunWorkerCompleted += new RunWorkerCompletedEventHandler(_bw_2_RunWorkerCompleted);
            _bw_2.WorkerReportsProgress = true;
            _bw_2.RunWorkerAsync();

            textBlock1.Text = "textBlock1显示内容";
        }

        private void _bw_1_DoWork(object sender,DoWorkEventArgs e)
        {
            BackgroundWorker _bw = sender as BackgroundWorker;
            Debug.WriteLine("_bw_1 backgroundworker start..");
            for (int i = 0; i < 5; i++)
            {
                Thread.Sleep(2000);
                Debug.WriteLine("_bw_1 thread(2000)");
                _bw.ReportProgress(i);
            }
        }

        private void _bw_1_ProgressChanged(object sender,ProgressChangedEventArgs e)
        {
            Debug.WriteLine("_bw_1 backgroundworker ProgressChanged..");
        }

        private void _bw_1_RunWorkerCompleted(object sender,RunWorkerCompletedEventArgs  e)
        {
            Debug.WriteLine("_bw_1 backgroundworker RunWorkerCompleted..");
        }

 

        private void _bw_2_DoWork(object sender, DoWorkEventArgs e)
        {
            BackgroundWorker _bw = sender as BackgroundWorker;
            Debug.WriteLine("_bw_2 backgroundworker start..");
            for (int i = 0; i < 5; i++)
            {
                Thread.Sleep(2000);
                Debug.WriteLine("_bw_2 thread(2000)");
                _bw.ReportProgress(i);
            }
        }

        private void _bw_2_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            Debug.WriteLine("_bw_2 backgroundworker ProgressChanged..");
        }

        private void _bw_2_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            Debug.WriteLine("_bw_1 backgroundworker RunWorkerCompleted..");
        }