RegEx for Hex string validation

[slg]

How can i validate the characters in a string are all hex chars.

I tried following but it does not work.

Regex r = new Regex(@"^([A-F]|[a-f]|[0-9])*");



TIA.

[Kerem Gümrükcü]

Re: RegEx for Hex string validation

Hi,

what about trying to convert the hex into a e.g. long value?
When it fails you will get a exception and you can handle the
exception depending on the error.

Regards

Kerem

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[Jon Skeet [C# MVP]]

Re: RegEx for Hex string validation

slg <slg@abc.comwro te:

How can i validate the characters in a string are all hex chars.
>
I tried following but it does not work.
>
Regex r = new Regex(@"^([A-F]|[a-f]|[0-9])*");

You've got the ^ at the beginning, but no $ at the end. You can also
express the middle part more simply:

Regex r = new Regex(@"^[A-Fa-f0-9]*$");

Note that it will match an empty string as well as one with actual
content - is that what you want?

--
Jon Skeet - <skeet@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
World class .NET training in the UK: http://iterativetraining.co.uk

[slg]

Re: RegEx for Hex string validation

thx alot

Yes, this is exactly what i was looking for.



"Jon Skeet [C# MVP]" <skeet@pobox.co mwrote in message
news:MPG.21bbbb e054733c2368d@m snews.microsoft .com...

slg <slg@abc.comwro te:

> How can i validate the characters in a string are all hex chars.
>>
>I tried following but it does not work.
>>
>Regex r = new Regex(@"^([A-F]|[a-f]|[0-9])*");

>
You've got the ^ at the beginning, but no $ at the end. You can also
express the middle part more simply:
>
Regex r = new Regex(@"^[A-Fa-f0-9]*$");
>
Note that it will match an empty string as well as one with actual
content - is that what you want?
>
--
Jon Skeet - <skeet@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
World class .NET training in the UK: http://iterativetraining.co.uk