private void showNoteList() { List <ReadingNote> notelist = new List <ReadingNote>(); string username = phoneAppServeice.State["username"].ToString(); notelist = bookService.RefreshReadingNote(username, ISBN); if (notelist.Count > 0) { NoteListItems.ItemsSource = notelist; this.bn.Text = "书名:"; this.bookname.Text = book.Title + "\n"; } }