CODEWITHSUNDEEP
c#regex
Joshua Son
Joshua Son

Reputation: 1897

How to find string between some characters using regex in c#

Good day~ I am not really good at this regular expression. So I need your help, please.

Condition: Users can input their email addressed and name together. I want to extract email address and user name out of string.

string pattern1 = "Peter Jackson<[email protected]>";

From that string I want to get "Peter Jackson" and "<[email protected]>".

string pattern2 = "Peter Jackson([email protected])";

However, people always make mistakes like below.

And they can also use "[" instead of "<". so...

string pattern3 = "Peter Jackson[[email protected]]";

Even some stupid users can input like...

string pattern4 = "Peter Jackson{[email protected]}";

So, I had to look for the characters which are "<", "(", "[" and "{". I tried 

string regularExpressionPattern = @"^(<|(|[|{)(.*?)^(}|]|)|>)";

But I think I've done something wrong. And I also try to think that people could input more mistake like....

string pattern5 = "Peter Jackson<[email protected]>mistake";

Could anyone help this problem? Advanced thanks.

PS: I know how to split string with a character. So it won't help. I needa proper regular expression.

Upvotes: 0

Views: 393

Answers (3)

Steven V
Steven V

Reputation: 16585

Seems like (.*)[<\(\[{](.*)[>\)]}] works for me.

Groups for the name, and the email address as well.

http://regexr.com?33sq4 is my test.

Upvotes: 0

Kendall Frey
Kendall Frey

Reputation: 44316

(.*?)[([<{](.*?)[)\]>}]

I believe this should be adequate.

The name will be in the first captured group, and the email will be in the second.

Upvotes: 0

Justin O Barber
Justin O Barber

Reputation: 11591

I believe the regular expression you are looking for is as follows:

(.*?)[<([{](.*?)[>)\]}]

You would want group 1 and group 2.

Upvotes: 1

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