Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
?
Solved

regex in c#

Posted on 2012-03-12
8
Medium Priority
?
315 Views
Last Modified: 2012-03-16
I am trying to remove certain html tags and save the value.

ex) <customerid><style face="normal" font="default">d33333</style></customerid>


There are some other tags I want to remove. <tag> has some attributes.
<tag att='dfdff" att2="fdfdf">

Can you help?
0
Comment
Question by:dkim18
8 Comments
 
LVL 42

Expert Comment

by:Meir Rivkin
ID: 37711619
can u post the html?
which data you need exactly?
0
 
LVL 35

Assisted Solution

by:Terry Woods
Terry Woods earned 200 total points
ID: 37711960
You can only use a regex if your tags aren't nested.

eg with the following case we would need to remove the 2nd </div> tag without removing the first one if we were only targeting div tags with atttribute att="dfdff":

<div att="dfdff" att2="fdfdf"><div att="somethingelse">content</div>other content</div>

Working out that the 2nd </div> needs to be removed but not the first is a task for a parser, not a regex. If you are happy with the limitation that tags can't be nested, then I should be able to provide a regex. Let me know.
0
 
LVL 30

Assisted Solution

by:anarki_jimbel
anarki_jimbel earned 200 total points
ID: 37712127
Is your html text big enough?
In other words, are you sure that regex is a right solution? Unfortunately regex is known to have pretty bad performance... (e.g., http://www.codinghorror.com/blog/2006/01/regex-performance.html).
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 
LVL 75

Assisted Solution

by:käµfm³d 👽
käµfm³d   👽 earned 200 total points
ID: 37712136
Unfortunately regex is known to have pretty bad performance...
That depends, I think, on how you structure the regex. The "catastrophic backtracking" referenced in the article would be an example of a poorly-designed regex.
0
 
LVL 10

Accepted Solution

by:
Pierre François earned 1400 total points
ID: 37713959
The way to process files with this kind of structure is with the XPath libraries. HTML can be easily converted into XML files, and then parsed in the way you want.

See several examples of C# and .NET here: http://www.java2s.com/Tutorial/CSharp/0540__XML/0380__XmlPathNavigator.htm
0
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 37715591
HTML can be easily converted into XML files, and then parsed in the way you want.
...provided the HTML is actually valid XML (structurally).
0
 
LVL 10

Expert Comment

by:Pierre François
ID: 37715679
@kaufman: If the HTML is valid XML (XHTML), you don't need to convert it. My statement is that valid HTML can be converted into XHTML, which is valid XML.
0
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 37715766
And I agree, but your last post doesn't say "valid" HTML  = )
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

For those of you who don't follow the news, or just happen to live under rocks, Microsoft Research released a beta SDK (http://www.microsoft.com/en-us/download/details.aspx?id=27876) for the Xbox 360 Kinect. If you don't know what a Kinect is (http:…
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
this video summaries big data hadoop online training demo (http://onlineitguru.com/big-data-hadoop-online-training-placement.html) , and covers basics in big data hadoop .
When cloud platforms entered the scene, users and companies jumped on board to take advantage of the many benefits, like the ability to work and connect with company information from various locations. What many didn't foresee was the increased risk…
Suggested Courses
Course of the Month13 days, 17 hours left to enroll

581 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