字符编码 进制转换

public string StrToHex(string mStr) //返回处理后的十六进制字符串
    {
    return BitConverter.ToString(
    ASCIIEncoding.Default.GetBytes(mStr)).Replace("-", " ");
    } /* StrToHex */ 

   16进制字符串转换为10进制字符串 
 public string HexToStr(string mHex) // 返回十六进制代表的字符串
    {
    mHex = mHex.Replace(" ", "");
    if (mHex.Length <= 0) return "";
    byte[] vBytes = new byte[mHex.Length / 2];
    for (int i = 0; i < mHex.Length; i += 2)
    if (!byte.TryParse(mHex.Substring(i, 2), NumberStyles.HexNumber, null, out vBytes[i / 2]))
    vBytes[i / 2] = 0;
    return ASCIIEncoding.Default.GetString(vBytes);
    } /* HexToStr */

    字符串转换为宽字符

     public static string StringToWChar(string s)
    {
        StringBuilder outs = new StringBuilder();
        foreach (char item in s)
        {
            if (IsEncoding(item))//判断是否编码
            {
                outs.Append(string.Format("\\u{0:x4}", (int)item));
            }
            else//不是中文
            {
                outs.Append(item);
            }
        }
        return outs.ToString();
    }

    private static bool IsEncoding(char cha)
    {
        string NonEncodingChats = "abcdefghijklmnopqrstuvwxyz0123456789`!@#$%^&*()_+|-=\\,./;'[]{}:<>?";
        return NonEncodingChats.IndexOf(cha) == -1;
    }