/// <summary>
 /// 将当前DataTable转换为特殊字符分隔的字符串
 /// </summary>
 /// <param name="data"></param>
 /// <returns></returns>
 public static string toContentString(this DataTable data)
 {
     return(DataTableUtil.toContentString(data, null, new ArrayList()));
 }
 /// <summary>
 /// 将当前DataTable转换为特殊字符分隔的字符串
 /// </summary>
 /// <param name="data"></param>
 /// <param name="aes"></param>
 /// <param name="encrypt_columns"></param>
 /// <returns></returns>
 public static string toContentString(this DataTable data, AESCryptoBase aes, ArrayList encrypt_columns)
 {
     return(DataTableUtil.toContentString(data, aes, encrypt_columns));
 }