?
Solved

RegEx match a phrase but Replace only inner part

Posted on 2009-06-29
4
Medium Priority
?
349 Views
Last Modified: 2012-05-07
Hi,
Please look at the example code:

Const word_separation_chars As String = "^A-Z !#"
Dim search_str As String = "HELLO"
Dim reg_str As String = String.Format("([{0}]{1}[{0}])", word_separation_chars, search_str)

Dim input_line As String = " !HELLO WORLD# "
Dim marked_line As String = Regex.Replace(input_line, reg_str, "<span>$1</span>")

Will result:
" <span>!HELLO<span> WORLD# "

But what I need is to capture only the "HELLO" part (without the separation character) i.e.:
" !<span>HELLO<span> WORLD# "

How should I do that elegantly?
Thanks, Aryeh.
0
Comment
Question by:tuchfeld
  • 2
  • 2
4 Comments
 

Author Comment

by:tuchfeld
ID: 24740194
Note that the search_str can apear several times inside the input_line.
0
 
LVL 39

Accepted Solution

by:
abel earned 1000 total points
ID: 24740539
what have now is:

Regex.Replace(input_line, "([^A-Z !#]HELLO[[^A-Z !#])", "<span>$1</span>")
you can change that to the following:

Regex.Replace(input_line, "([^A-Z !#])(HELLO)([[^A-Z !#])", "$1<span>$2</span>$3")
Or, in other words, in your third line:

Dim reg_str As String = String.Format("([{0}])({1})([{0}])", word_separation_chars, search_str)

-- Abel --
0
 
LVL 39

Expert Comment

by:abel
ID: 24740544
> Note that the search_str can apear several times inside the input_line.
that doesn't matter, it will automatically replace all occurrences for each time the whole regex is matched.
0
 

Author Comment

by:tuchfeld
ID: 24743035
FYI, if anyone might find it useful, here is the RegEx I eventually used (it includes match at the beginning and end of input).
Aryeh.
Const word_separation_chars As String = "^a-z"
Dim reg_str As String = String.Format("((^|[{0}])({1})([{0}]|$))", word_separation_chars, search_str)

Open in new window

0

Featured Post

Become an Android App Developer

Ready to kick start your career in 2018? Learn how to build an Android app in January’s Course of the Month and open the door to new opportunities.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In my previous article (http://www.experts-exchange.com/Programming/Languages/.NET/.NET_Framework_3.x/A_4362-Serialization-in-NET-1.html) we saw the basics of serialization and how types/objects can be serialized to Binary format. In this blog we wi…
Wouldn’t it be nice if you could test whether an element is contained in an array by using a Contains method just like the one available on List objects? Wouldn’t it be good if you could write code like this? (CODE) In .NET 3.5, this is possible…
Is your OST file inaccessible, Need to transfer OST file from one computer to another? Want to convert OST file to PST? If the answer to any of the above question is yes, then look no further. With the help of Stellar OST to PST Converter, you can e…
How to fix display issue, screen flickering issue when I plug in power cord to the machine. Before I start explaining the solution lets check out once the issue how it looks like after I connect the power cord. most of you also have faced this…
Suggested Courses
Course of the Month8 days, 10 hours left to enroll

621 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question