C#•2y ago

✅ Regex to capture all attributes of html tag but it capture the last only.

Hi,

i have this code (see the picture)

i don't understand why i have the last attribute only.

i need have all.
please, help me.

code to use:

 MatchCollection attrmatches = new Regex(@"<[a-zA-Z.]+(?:\s+(\w+)\s*=\s*""[^""]*"")*\s*>", RegexOptions.Compiled).Matches(line);

 MatchCollection attrmatches = new Regex(@"<[a-zA-Z.]+(?:\s+(\w+)\s*=\s*""[^""]*"")*\s*>", RegexOptions.Compiled).Matches(line);

thx

leowest•2/12/24, 11:26 AM

looks like you're reading a XML file why not just use a library to read xml

Joschi•2/12/24, 11:29 AM

https://stackoverflow.com/a/1732454

General note on HTML and trying to use regex to parse it. Unless you want something really simple it won't be happening.

Stack Overflow

RegEx match open tags except XHTML self-contained tags

I need to match all of these opening tags:
<p>
<a href="foo">

But not self-closing tags:
<br />
<hr class="foo" />

I came up with this and wanted to make

Joschi•2/12/24, 11:30 AM

What exactly are you trying to do?

Do you have examples on what should/shouldn't be matched?

QQuark Hi, i have this code (see the picture) i don't understand why i have the last ...

Only in .NET stacks do we trust•2/12/24, 12:50 PM

Give more detailed information. For example your input text and the expected output. It should be easy to solve.

Pobiega•2/12/24, 12:53 PM

is a very good html parser library for C#

Pobiega•2/12/24, 12:53 PM

would make this trivial to solve

Only in .NET stacks do we trust•2/12/24, 1:17 PM

QuarkOP•2/12/24, 3:14 PM

hi, thanx but i don't want use a library (i ask it ?).
my line to read is in SyncRoot var (read the picture).
i try to do that u see exactly . use a regex to capture all attributes in <tag >

@talk is cheap, show me the code
but, i need to identify the tag too to get his index and length in my line.

if i use your regex, when i have a lot of tag in same line or text + a tag, i can't know who is the good tag (position in text).

eg: blablabla <tag f="tt"> <tag j="klkll"> blabla

TeBeCo•2/12/24, 4:09 PM

$html

TTeBeCo $html

MODiX•2/12/24, 4:09 PM

https://media.discordapp.net/attachments/569261465463160900/1106342754470084608/image.png

QuarkOP•2/12/24, 6:09 PM

i undersand but why the online regex can analyse the same line correctly ?

https://regex101.com/
choose .net

Pattern

text : <SimBase.Document Type="MissionFile" version="1,0">

it can capture all attributes.

for me, this is not because the html is irregular and regex is regular,
regex can parse my text but if i use in a real code, it fail.

same with http://regexstorm.net/tester
Pattern :

regex101

regex101: build, test, and debug regex

Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.