private void btn_edit_Click(object sender, RoutedEventArgs e)
 {
     if (LB_Note.SelectedIndex < 0)
     {
         viewModel.ErrorMessage = "请先选择一项";
     }
     else
     {
         FunPage.SchoolNoteEdit editWindow = new FunPage.SchoolNoteEdit();
         editWindow.viewModel.NoteModel = LB_Note.SelectedItem as SeatManage.ClassModel.SchoolNoteInfo;
         editWindow.viewModel.IsEdit    = true;
         editWindow.ShowDialog();
         GetDate();
     }
 }
 private void btn_new_Click(object sender, RoutedEventArgs e)
 {
     FunPage.SchoolNoteEdit editWindow = new FunPage.SchoolNoteEdit();
     editWindow.ShowDialog();
     GetDate();
 }