private void RenrenSelection_Changed(object sender, SelectionChangedEventArgs e) { int index = renrenPicker.SelectedIndex; String recentCount = IndexToValue(index); // Selection_Changed会比Init发生得早,若此时SerPreference // Init过程中得到的那个Preference就被覆盖了 if (m_bInitFinished) { PreferenceHelper.SetPreference("Renren_RecentCount", recentCount); } }