public static EraseAllDataPage CreateInstance()
 {
     if (m_instance == null)
     {
         m_instance = new EraseAllDataPage();
     }
     return m_instance;
 }
        private void NaviToEraseAllDataView(object sender, EventArgs e)
        {
            // 更改top图标与相关内容
            BitmapImage image = new BitmapImage(new Uri("../Image/icon_Erase_all_data.png", UriKind.Relative));
            m_iconImg.Source = image;
            m_tbFileName.Text = "Erase All Datas";
            m_tbTips.Text = "You don't have to re-install the OS for your device.";

            if (m_eraseAllDataPage == null)
            {
                m_eraseAllDataPage = EraseAllDataPage.CreateInstance();
                m_eraseAllDataPage.FinishScanHandler += ResponseFinishScan;
            }
            m_mainWidget.Navigate(m_eraseAllDataPage);
            m_naviWidget = NaviWidget.EraseAllDataPage;

            m_btnBack.Visibility = System.Windows.Visibility.Visible;
            m_btnErase.Visibility = System.Windows.Visibility.Visible;
     
        }