c#之utf8和gb2312互转

  public string GB2312ToUtf8(string gb2312String)
        {
            Encoding fromEncoding = Encoding.GetEncoding("gb2312");
            Encoding toEncoding = Encoding.UTF8;
            return EncodingConvert(gb2312String, fromEncoding, toEncoding);
        }
        public string Utf8ToGB2312(string utf8String)
        {
            Encoding fromEncoding = Encoding.UTF8;
            Encoding toEncoding = Encoding.GetEncoding("gb2312");
            return EncodingConvert(utf8String, fromEncoding, toEncoding);
        }
        public string EncodingConvert(string fromString, Encoding fromEncoding, Encoding toEncoding)
        {
            byte[] fromBytes = fromEncoding.GetBytes(fromString);
            byte[] toBytes = Encoding.Convert(fromEncoding, toEncoding, fromBytes);
            string toString = toEncoding.GetString(toBytes);
            return toString;
        }