Asp.Net \uxxx Unicode编码解码

/// <summary>

        /// Unicode编码(汉字转换为\uxxx)

        /// </summary>

        /// <param name="str"></param>

        /// <returns></returns>

        public static string EnUnicode(string str)

        {

            StringBuilder strResult = new StringBuilder();

            if (!string.IsNullOrEmpty(str))

            {

                for (int i = ; i < str.Length; i++)

                {

                    strResult.Append("\\u");

                    strResult.Append(((int)str[i]).ToString("x"));

                }

            }

            return strResult.ToString();

        }

        /// <summary>

        /// Unicode解码（\uxxxx转换为汉字）

        /// </summary>

        /// <param name="str"></param>

        /// <returns></returns>

        public static string DeUnicode(string str)

        {

            //最直接的方法Regex.Unescape(str);

            Regex reg = new Regex(@"(?i)\\[uU]([0-9a-f]{4})");

            return reg.Replace(str, delegate(Match m) { return ((char)Convert.ToInt32(m.Groups[].Value, )).ToString(); });

        }

/// <summary>

    /// 汉字转换为Unicode编码（测试）

    /// </summary>

    /// <param name="str"></param>

    /// <returns></returns>

    public static string StringToUnicode(string str)

    {

        string result = "";

        for (int i = ; i < str.Length; i++)

        {

            result += "&#" + (int)(str.Substring(i, ).ToCharArray()[]) + ";";

        }

        return result;

    }