Need help with RegEx

Alexander Vasilevsky

This code
Regex ge = new Regex("[,\f/]");

string format = ge.Replace("8 kBit/s, 8,000 Hz, Mono", "_");

returns

"8 kBit_s_ 8_000 Hz_ Mono"
and I need
"8_kBit_s_ 8_000_Hz_ Mono"

http://www.alvas.net - Audio tools for C# and VB.Net developers

Nov 23 '07 #1

Jon Skeet [C# MVP]

On Nov 23, 10:10 am, "Alexander Vasilevsky" <al...@alvas.netwrote:

This code
Regex ge = new Regex("[,\f/]");

string format = ge.Replace("8 kBit/s, 8,000 Hz, Mono", "_");

returns

"8 kBit_s_ 8_000 Hz_ Mono"
and I need
"8_kBit_s_ 8_000_Hz_ Mono"

Could you explain the rules for that? It's not clear in which
situations you'd want a space to be replaced by _ and in which
situations you wouldn't.

(What is the form feed in the regular expression meant to be doing, by
the way?)

Jon

Nov 23 '07 #2

Alexander Vasilevsky

I want to replace all white space " " to "_". See below

"8 kBit_s_ 8_000 Hz_ Mono"
"8_kBit_s_ 8_000_Hz_ Mono"

http://www.alvas.net - Audio tools for C# and VB.Net developers
"Jon Skeet [C# MVP]" <sk***@pobox.com???????/???????? ? ????????
?????????:
news:5c**********************************@d27g2000 prf.googlegroups.com...

On Nov 23, 10:10 am, "Alexander Vasilevsky" <al...@alvas.netwrote:

>This code
Regex ge = new Regex("[,\f/]");

string format = ge.Replace("8 kBit/s, 8,000 Hz, Mono", "_");

returns

"8 kBit_s_ 8_000 Hz_ Mono"
and I need
"8_kBit_s_ 8_000_Hz_ Mono"

Could you explain the rules for that? It's not clear in which
situations you'd want a space to be replaced by _ and in which
situations you wouldn't.

(What is the form feed in the regular expression meant to be doing, by
the way?)

Jon

Nov 23 '07 #3

Alexander Vasilevsky

The decision proved very easy
Regex ge = new Regex(@"\W");

;)
http://www.alvas.net - Audio tools for C# and VB.Net developers
"Jon Skeet [C# MVP]" <sk***@pobox.com???????/???????? ? ????????
?????????:
news:5c**********************************@d27g2000 prf.googlegroups.com...

On Nov 23, 10:10 am, "Alexander Vasilevsky" <al...@alvas.netwrote:

>This code
Regex ge = new Regex("[,\f/]");

string format = ge.Replace("8 kBit/s, 8,000 Hz, Mono", "_");

returns

"8 kBit_s_ 8_000 Hz_ Mono"
and I need
"8_kBit_s_ 8_000_Hz_ Mono"

Could you explain the rules for that? It's not clear in which
situations you'd want a space to be replaced by _ and in which
situations you wouldn't.

(What is the form feed in the regular expression meant to be doing, by
the way?)

Jon

Nov 23 '07 #4

Christof Nordiek

"Alexander Vasilevsky" <al***@alvas.netschrieb im Newsbeitrag
news:fi***********@behemoth.volia.net...

>I want to replace all white space " " to "_". See below

to match any Whitespace use \s

>
"8 kBit_s_ 8_000 Hz_ Mono"
"8_kBit_s_ 8_000_Hz_ Mono"

there is a space before 8 and before Mono wich is not replaced. I suppose
this is a typo.

Christof

Nov 23 '07 #5

Christof Nordiek

"Alexander Vasilevsky" <al***@alvas.netschrieb im Newsbeitrag
news:fi***********@behemoth.volia.net...

The decision proved very easy
Regex ge = new Regex(@"\W");

this matches all characters, wich are nor letter nor digit. So it will also
replace some non-whitespace charackters. E.g. +*#()&%

Christof

Nov 23 '07 #6

Alexander Vasilevsky

Yes. Well done!

http://www.alvas.net - Audio tools for C# and VB.Net developers
"Christof Nordiek" <cn@nospam.de???????/???????? ? ???????? ?????????:
news:%2****************@TK2MSFTNGP03.phx.gbl...

"Alexander Vasilevsky" <al***@alvas.netschrieb im Newsbeitrag
news:fi***********@behemoth.volia.net...

>The decision proved very easy
Regex ge = new Regex(@"\W");

this matches all characters, wich are nor letter nor digit. So it will
also replace some non-whitespace charackters. E.g. +*#()&%

Christof

Nov 23 '07 #7

Jon Skeet [C# MVP]

On Nov 23, 10:56 am, "Alexander Vasilevsky" <al...@alvas.netwrote:

I want to replace all white space " " to "_". See below

"8 kBit_s_ 8_000 Hz_ Mono"
"8_kBit_s_ 8_000_Hz_ Mono"

That hasn't replaced all spaces with _ - you've still got a space
before the 8 and before the M. Do you *actually* want the result to be

"8_kBit_s_8_000_Hz_Mono"

?

It's really, really important to be absolutely accurate in what you
want, otherwise we won't be able to help you.

Jon

Nov 23 '07 #8

Alexander Vasilevsky

Yes. The decision proved very easy
Regex ge = new Regex(@"\W");

;)

http://www.alvas.net - Audio tools for C# and VB.Net developers
"Jon Skeet [C# MVP]" <sk***@pobox.com???????/???????? ? ????????
?????????:
news:f9**********************************@e6g2000p rf.googlegroups.com...

On Nov 23, 10:56 am, "Alexander Vasilevsky" <al...@alvas.netwrote:

>I want to replace all white space " " to "_". See below

"8 kBit_s_ 8_000 Hz_ Mono"
"8_kBit_s_ 8_000_Hz_ Mono"

That hasn't replaced all spaces with _ - you've still got a space
before the 8 and before the M. Do you *actually* want the result to be

"8_kBit_s_8_000_Hz_Mono"

?

It's really, really important to be absolutely accurate in what you
want, otherwise we won't be able to help you.

Jon

Nov 23 '07 #9