解码字符串中的十六进制字符

Question

From a third part i get a string like this "123123" Ill have to wrap it into some XML however i get this error System.ArgumentException: '', hexadecimal value 0x04, is an invalid character.

Can I either decode the hex value to something meaningful, or just delete it. The solution must be able to handle other hex values as well.

Answer 1

I ended up creating this method

public static string RemoveInvalidXmlChars(string str)
{

    var sb = new StringBuilder();
    var decodedString = HttpUtility.HtmlDecode(str);

    foreach (var c in decodedString)
    {
        if (XmlConvert.IsXmlChar(c))
            sb.Append(c);
    }

    return sb.ToString();
}