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From: Jeff Johnson on 23 Feb 2010 16:06
"Matthijs de Z" <matthijsdezwart(a)gmail.com> wrote in message
news:34b09643-66fb-4602-b166-888c0779dd35(a)n5g2000vbq.googlegroups.com...

>> > I tried to add Path.DirectorySeparatorChar.ToString() to the front of
>> > the regular expression string, I get it twice.
>
>> > string myDefaultName = @Path.DirectorySeparatorChar + "defaultName";
>> > string regExpression = "("+myDefaultName+@"[0-9]{8}\.[zZ][iI][pP])";
>
>> > Gives me "(\\defaultName[0-9]{8}\\.[zZ][iI][pP])" as a regular
>> > expression, while DirectorySeparatorChar is actually just one \
>> > (although I can see it twice again in the result set)
>
>> When you say "I get it twice," what are you using to make this
>> determination? Are you simply looking at the tooltip display in the
>> debugger?

> when I hover over the variable that contains the string
> (myDefaultName) I see \\ but when I add the string to a richTextBox I
> just see one. So I suppose it's just one \.

So then you're seeing exactly what I described.

> But still....it doesn't work...

See my other reply.


From: Jeff Johnson on 23 Feb 2010 16:06
"Matthijs de Z" <matthijsdezwart(a)gmail.com> wrote in message
news:d97baa89-7a49-43ff-be51-d2b5c172319a(a)k11g2000vbe.googlegroups.com...

>> If you are trying to match on the filename only, it seems to me you'd be
>> better off preprocessing the path before you hand it to the regex. Just
>> use the Path class, with the GetFileName() method, to obtain only the
>> filename portion of the path, then match that against the regex.

> if I do that, i think I will still have a problem with for
> instance:'copy defaulName20100223.zip'
> How can I make sure I only get the names like defaulName20100223.zip?
> regards,

Put ^ at the beginning of the regex so that it only matches if the string
starts with the default name.


From: Matthijs de Z on 23 Feb 2010 16:28
On 23 feb, 22:06, "Jeff Johnson" <i....(a)enough.spam> wrote:
> "Matthijs de Z" <matthijsdezw...(a)gmail.com> wrote in messagenews:d97baa89-7a49-43ff-be51-d2b5c172319a(a)k11g2000vbe.googlegroups.com...
>
> >> If you are trying to match on the filename only, it seems to me you'd be
> >> better off preprocessing the path before you hand it to the regex. Just
> >> use the Path class, with the GetFileName() method, to obtain only the
> >> filename portion of the path, then match that against the regex.
> > if I do that, i think I will still have a problem with for
> > instance:'copy defaulName20100223.zip'
> > How can I make sure I only get the names like defaulName20100223.zip?
> > regards,
>
> Put ^ at the beginning of the regex so that it only matches if the string
> starts with the default name.

when I use
string regExpression = @"^([0-9]{8}\.[zZ][iI][pP])";

It doesn't work, unless I trimdown the filename, cutting of all
directory info. But I need need that actually..
Regards,

Matthijs
From: Jeff Johnson on 23 Feb 2010 16:48
"Matthijs de Z" <matthijsdezwart(a)gmail.com> wrote in message
news:49ba1cee-1446-4728-a13b-59d83e172a60(a)d27g2000vbl.googlegroups.com...

>> >> If you are trying to match on the filename only, it seems to me you'd
>> >> be
>> >> better off preprocessing the path before you hand it to the regex.
>> >> Just
>> >> use the Path class, with the GetFileName() method, to obtain only the
>> >> filename portion of the path, then match that against the regex.
>> > if I do that, i think I will still have a problem with for
>> > instance:'copy defaulName20100223.zip'
>> > How can I make sure I only get the names like defaulName20100223.zip?
>> > regards,
>>
>> Put ^ at the beginning of the regex so that it only matches if the string
>> starts with the default name.
>
> when I use
> string regExpression = @"^([0-9]{8}\.[zZ][iI][pP])";
>
> It doesn't work, unless I trimdown the filename, cutting of all
> directory info. But I need need that actually..

Well, I was building on what Pete said, and he suggested that you strip of
the directory information. I didn't realize it was important to you.

Does this work:

string regExpression = @".*\\" + myDefaultName +
"(\d{8}\.[zZ][iI][pP])$";

(I replaced [0-9] with \d, since they're the same. Also, you should just
consider setting the case-insensistive option on the regex and test for
"zip" instead of the way you're doing it now, unless case in the rest of the
file name is important--but why would it be?)


From: Jeff Johnson on 23 Feb 2010 16:50
"Matthijs de Z" <matthijsdezwart(a)gmail.com> wrote in message
news:49ba1cee-1446-4728-a13b-59d83e172a60(a)d27g2000vbl.googlegroups.com...

[Reply sent too soon.]

I also wanted to recommend that you go get a utility which will help you
test regular expressions. I like Expresso, which is free.
http://www.ultrapico.com.


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