盘古分词法

#region 方法：对要搜索的词分词第一种方法
   /// <summary>
    /// 对要搜索的词分词第一种方法
   /// </summary>
   /// <param name="keywords">要分的关键词</param>
   /// <param name="ktTokenizer"></param>
   /// <returns></returns>
    static public string GetKeyWordsSplitBySpace(string keywords, PanGuTokenizer ktTokenizer)
    {
        StringBuilder result = new StringBuilder();
        ICollection<WordInfo> words = ktTokenizer.SegmentToWordInfos(keywords);
        foreach (WordInfo word in words)
        {
            if (word == null)
            {
                continue;
            }

            result.AppendFormat("{0}^{1}.0 ", word.Word, (int)Math.Pow(3, word.Rank));
        }
        return result.ToString().Trim();
    }
    #endregion

调用 string strkey = GetKeyWordsSplitBySpace(txtkey, new PanGuTokenizer());