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I use in my C++/CLI project ToBase64String to give a string like /MnwRx7kRZEQBxLZEkXndA== I want to convert this string to Hexadecimal representation, How I can do that in C++/CLI or C#?

Aan
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  • It seems quite stupid to convert to Base64 and then Hex a string. You could Hex directly the source. Unless you have other problems... – xanatos Oct 16 '11 at 13:04
  • unless all you have is the base64 string ... maybe he doesn't have the source. If so, then I agree. – bryanmac Oct 16 '11 at 13:11
  • Specifically, in Hans's answer [here](http://stackoverflow.com/questions/7774648/how-can-convert-this-c-sharp-code-to-c-cli/7774720#7774720), get rid of `ToBase64String` and use `BitConverter::ToString` instead. – Ben Voigt Oct 17 '11 at 17:33

3 Answers3

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FromBase64String will take the string to bytes

byte[] bytes = Convert.FromBase64String(string s);

Then, BitConverter.ToString() will convert a byte array to a hex string ( byte[] to hex string )

string hex = BitConverter.ToString(bytes);
Max Voisard
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bryanmac
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0
public string Base64ToHex(string strInput)
{
    try
    {
        var bytes = Convert.FromBase64String(strInput);
        var hex = BitConverter.ToString(bytes);
        return hex.Replace("-", "").ToLower();
    }
    catch (Exception)
    {
        return "-1";
    }
}

On the contrary: https://stackoverflow.com/a/61224761/3988122

Meysam Ghorbani
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0

Convert the string to a byte array and then do a byte to hex conversion

string stringToConvert = "/MnwRx7kRZEQBxLZEkXndA==";

byte[] convertedByte = Encoding.Unicode.GetBytes(stringToConvert);

string hex = BitConverter.ToString(convertedByte);

Console.WriteLine(hex);
Community
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Ranhiru Jude Cooray
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    I think the unicode.getbytes will treat that string as unicode chars when what you want is for the conversion to treat them as Base64. I think Convert.FromBase64String() does exactly that ... – bryanmac Oct 16 '11 at 13:10