How to convert IDN to ASCII?

Question

What is the best way to convert an internationalized domain name to its ASCII-form?

I want to convert Bücher.ch into xn--bcher-kva.ch by using some sort of (free) .net code.

score 37 · Answer 1 · edited Nov 08 '10 at 15:48

37

using System.Globalization;
...
IdnMapping idn = new IdnMapping();
MessageBox.Show(idn.GetAscii("www.kraków.pl"));

edited Nov 08 '10 at 15:48

Espo

answered Nov 04 '10 at 20:45

adam

score 6 · Answer 2 · answered Mar 10 '14 at 09:25

To Get the other way around from xn--bcher-kva.ch domain to Bücher.ch

using System.Globalization;
...
IdnMapping idn = new IdnMapping();
MessageBox.Show(idn.GetUnicode("xn--bcher-kva.ch"));

You will get www.kraków.pl as result. Because i came here to look for this :) hope it is helpful for others as well :)

score 4 · Accepted Answer · answered May 12 '09 at 11:34

4

Have a look at the GNU IDN Library - Libidn. The introduction says that C# libraries are available.

answered May 12 '09 at 11:34

dommer

5

-1 for suggesting a 3rd party library when .NET itself is capable of this. – Venemo Aug 12 '12 at 06:58
2

@Venemo The .NET library does not support all chars. [link](http://manage.resellerclub.com/kb/answer/1740) for example: **ß** is not supported. – Pumper Jan 05 '15 at 17:21

3 Answers3