vb.net simple regex query

Question

I'm trying to learn how to use regex to remove all gibberish characters from a string except for alphanumeric and : . and the newline character, whatever it may be.

I am using this

TextBox1.Text = Regex.Replace(TextBox1.Text, "[^:.0-9a-zA-Z ]+?", "")

But my result seems to remove all the newline characters too, I thought this is what the ? at the end of the regex query did, tell it to exclude the newline character from the replacement?

Thanks for your input guys

are you using singleline mode..

Anirudha
– Anirudha

2012-10-06 08:48:09 +00:00
Commented Oct 6, 2012 at 8:48 — Anirudha
– Anirudha, Commented Oct 6, 2012 at 8:48
No, the text box is multiline ;)

Nookster
– Nookster

2012-10-06 08:50:47 +00:00
Commented Oct 6, 2012 at 8:50 — Nookster
– Nookster, Commented Oct 6, 2012 at 8:50

Anirudha · Accepted Answer · 2012-10-06 08:51:21Z

2

It should be

[^:.0-9a-zA-Z\r\n]+

? is not required

edited Oct 6, 2012 at 8:51

answered Oct 6, 2012 at 8:44

Anirudha

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3 Comments

Nookster Over a year ago

I tried this but it didn't remove any of the gibberish characters

Tim Pietzcker Over a year ago

Two comments: You don't need to escape the dot inside a character class. And I would use \r\n instead of \s\n - \n is already a part of \s, and \s matches spaces and tabs, too, which may not be desired.

Nookster Over a year ago

Perfect! Thanks very much guys. This is tricky to grasp at first think i'm going to buy a book on it.

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