/// <summary>

         /// 截断字符串

         /// </summary>

         /// <param name="maxLength">最大长度</param>

         /// <param name="str">原字符串</param>

         /// <returns></returns>

         public static string CutStr(int maxLength, string str)

         {

             string temp = str;

             if (Regex.Replace(temp, "[\u4e00-\u9fa5]", "zz", RegexOptions.IgnoreCase).Length <= maxLength)

             {

                 return temp;

             }

             for (int i = temp.Length; i >= ; i--)

             {

                 temp = temp.Substring(, i);

                 if (Regex.Replace(temp, "[\u4e00-\u9fa5]", "zz", RegexOptions.IgnoreCase).Length <= maxLength - )

                 {

                     return temp + "...";

                 }

             }

             return "...";

         }