Regex

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AMP - 02 Apr 2008 14:46 GMT

Hello,
I have a Regex:
Regex regex = new Regex(@"22 22 22 22 22 22 22 22 22 22(?
<centervalue>.+)33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33
33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33");

Sometimes my data has 10 sets of "22"'s , sometimes 12, 14 ,ect.
I want the centervalue to start after ALL of the "22"'s but this is
not happening.
Once it see's the 10 sets it starts there, but I want it to start at
the end, no matter how many sets.
Any suggestions?
Thanks,
Mike

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Ethan Strauss - 02 Apr 2008 15:29 GMT

You want to specificy at least 10 repeats like this
Regex regex = new Regex(@"(22 ){10,}(?
<centervalue>.+)(33 ){minimum allowable number,}");

I think that will do it.
If you enclose something in curly braces and follow it by the following
strings, you will get the following number of matches (from C# in a Nutshell
edition something)
* Any number of matches (including zero)
+ At least 1 match
? Exactly 1 match
{n} Exactly n matches
{n,} At least n matches
{n,m} At least n matches, No more than m matches

Ethan

> Hello,
> I have a Regex:
[quoted text clipped - 10 lines]
> Thanks,
> Mike

Reply to this Message

AMP - 02 Apr 2008 15:46 GMT

On Apr 2, 10:29 am, Ethan Strauss
<EthanStra...@discussions.microsoft.com> wrote:

> You want to specificy at least 10 repeats like this
> Regex regex = new Regex(@"(22 ){10,}(?
[quoted text clipped - 29 lines]
>
> - Show quoted text -

I'm getting:
"parsing \"(22 ){10,}(? <centervalue>.+)(33 ){10,}\" - Unrecognized
grouping construct."

Mike

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Ethan Strauss - 02 Apr 2008 16:01 GMT

There is an extra space after your question mark and before the less than

should be
(22 ){10,}(?<centervalue>.+)(33 ){10,}
not
(22 ){10,}(? <centervalue>.+)(33 ){10,}

At least this takes care of the parsing error. I have not tested it for real
functionality.
Ethan

> On Apr 2, 10:29 am, Ethan Strauss
> <EthanStra...@discussions.microsoft.com> wrote:
[quoted text clipped - 37 lines]
>
> Mike

Reply to this Message

KH - 02 Apr 2008 18:28 GMT

How about:

string str = "22 22 22 22 22 22 My Value 33 33 33 33 33 33 33";

int start = str.LastIndexOf(" 22") + 3;
int end = str.IndexOf(" 33);

// Now you have the start and end locations of the value you're looking for
and can use SubString to parse it out, or a RegEx if you need more complex
parsing logic for it.

HTH

> Hello,
> I have a Regex:
[quoted text clipped - 10 lines]
> Thanks,
> Mike

Reply to this Message

Regex

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