How to convert IDN to ASCII?

问题

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.

回答1:

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

回答2:

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

回答3:

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 :)

MSDN

来源：https://stackoverflow.com/questions/852274/how-to-convert-idn-to-ascii