private void ClearDataViewMenuItemClick(object sender, RoutedEventArgs e)
 {
     DataView.View        = null;
     DataView.ItemsSource = null;
     Radical2Chars.Clear();
     Char2Radicals.Clear();
     ResetStatusText();
 }
        //控制器-主要功能

        private void SearchByWord(char Word, Action UpdateStatusRadicalCountTextFunc, Action UpdateDataViewToEmpty)
        {
            if (Char2Radicals.ContainsKey(Word))
            {
                RefreshDataViewWithChars(new Dictionary <char, List <string> > {
                    { Word, Char2Radicals[Word] }
                }, UpdateStatusRadicalCountTextFunc);
            }
            else
            {
                UpdateDataViewToEmpty();
            }
        }