Regex for rewriting url to remove non-ascii characters


I have this regular expression in a CMS that allows for urls with  Swedish characters å,ä,ö.

So for example a url for a page might look like this:


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and the RegEx used inn the CMS looks like this:

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I would like it only to allow ascii so that the url would have to look like this instead:

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How can I alter the RegEx to accomplish that?

Thanks for help!

Peter NordbergIT ManagerAsked:
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Terry WoodsIT GuruCommented:
Swap the \p{L} for a-zA-Z :

Peter NordbergIT ManagerAuthor Commented:
Hi and thanks for answer,

This makes a url  like this:

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to look like this:

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Is it possible to get it å, ä to be replaces with a and ö to be raplaced with o?

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Terry WoodsIT GuruCommented:
Do you mean with a regex, or will a custom function be ok?
Peter NordbergIT ManagerAuthor Commented:
With RegEx because I don't know how to impolement it with a custom function in this scenario.

Terry WoodsIT GuruCommented:
Apparently those characters are called "diacritics".

I can't see how to do that with a regex. If you'd like an alternative technique, apparently this works:

string initial = "ÁÂÃÄÅÇÈÉàáâãäåèéêëìíîïòóôõ";
string normal = initial.Normalize(NormalizationForm.FormD);
var withoutDiacritics = normal.Where(
    c => CharUnicodeInfo.GetUnicodeCategory(c) != UnicodeCategory.NonSpacingMark);
string final = new string(withoutDiacritics.ToArray());

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Regular Expressions

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