How do I convert a hexadecimal string to a decimal string

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I'm currently working on a school project that is supposed to convert IP Adresses into another number system, while keeping the general 'syntax' of an IP adress and do the same thing vice versa and I am currently running into a problem while trying to convert a hexadecimal value back to a decimal value.

The procedure I use to convert from decimal to hex, for example, would look like this

string DecimalToHex(string input)
{
    return String.Join(".", (input.Split('.').Select(x => Convert.ToString(Int32.Parse(x), 16))).ToArray());
}

With (string input) being the text of a textbox. And if that input is "c0", I'd like the output to - of course - be 192.

What I have tried:

I've tried a few things I found around the net, like working with System.Globalization.NumberStyles.HexNumber, but to no avail so far.

Posted 4-Dec-18 23:34pm

Member 13777741

Updated 4-Dec-18 23:42pm

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Richard MacCutchan · Answer 1 · 2018-12-04T23:42:00

Start by avoiding compound statements like that, where you cannot see the results at each step. Use String.Split to get an array containing the four fields, then convert each one to its integer value. From that you can use the String.Format Method (System) | Microsoft Docs[^] to display them as decimal values. And a minor change would allow you to convert decimal strings to hex.