Regex Working on internet but doesn't work on VB.NET

Question

as you can see on this link my regex code works well. But same code in VB.NET having problem. As you can see on regexr website i must catch 25 matches. But VB.NET is returns 12 matches. (I see 2 matches when i look into a match).

<tr><td align=LEFT><A HREF="/satellite/?s=41315">BEIDOU M3-S</A></td><td align=CENTER>41315</td><td align=CENTER>2016-006A</td><td align=CENTER><a href="/browse/?y=2016&m=2">February 1, 2016</a></td><td align=CENTER>783</td><td align=CENTER><button class="sButton" onclick="javascript:window.location.href='/?s=41315'">TRACK IT</button></td></tr>
<tr bgcolor="#F4F4F4"><td align=LEFT><A HREF="/satellite/?s=40938">BEIDOU I2-S</A></td><td align=CENTER>40938</td><td align=CENTER>2015-053A</td><td align=CENTER><a href="/browse/?y=2015&m=9">September 29, 2015</a></td><td align=CENTER>1436.2</td><td align=CENTER><button class="sButton" onclick="javascript:window.location.href='/?s=40938'">TRACK IT</button></td></tr>

this is 1 match on vb.net. Actually must be 2 matches (seems like on regexr).

thanks inadvance

But you should [use an HTML parser to parse HTML](http://stackoverflow.com/a/1732454/11683). — GSerg, Feb 24 '16 at 08:43
I think [this](http://stackoverflow.com/a/34495840/1219280) might help answering the discrepancy between your regex results in `regexr` and `.NET`. — Veverke, Feb 24 '16 at 09:07
They says use online regex tester for .net and i tested just now. [regexstorm](http://regexstorm.net/tester) resturns 25 matches. so regex pattern which i used is true. — MGR, Feb 24 '16 at 09:58
Use `RegexOptions.Singleline` modifier with `Regex.Matches(str, regex, RegexOptions.Singleline)`. — Wiktor Stribiżew, Feb 24 '16 at 10:21

score 0 · Accepted Answer · answered Feb 24 '16 at 10:32

0

I think maybe the problem is that your matching pattern contains some doublequotes symbols and you're not handling this..

So I edited your pattern, tried the following code, and it returns two matches:

Dim ptrn As String = "<tr( bgcolor=""#F4F4F4""|)><td align=LEFT><A HREF=""(.*?)"">(.*?)<\/A><\/td><td align=CENTER>(.*?)<\/td><td align=CENTER>(.*?)<\/td><td align=CENTER><a href=""(.*?)"">(.*?)<\/a><\/td><td align=CENTER>(.*?)<\/td><td align=CENTER><button class=""sButton"" onclick=""(.*?)"">TRACK IT<\/button><\/td><\/tr>"
MessageBox.Show(Regex.Matches(txtInput.Text, ptrn).Count.ToString & " matches found")

Screenshot:

Hope this helps :)

answered Feb 24 '16 at 10:32

41686d6564 stands w. Palestine

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Thanks. solved my problem but i can't understand. how internet shows 25 matches if my pattern is wrong :S – MGR Feb 24 '16 at 13:16
It's not wrong, it just contains characters (") that VB uses as a start and end 'tag' for strings.. you may also put your pattern (as it is in 'regexr.com') in a textbox (e.g: txtPattern) and call: `Regex.Mathes(txtInput.Text, txtPattern.Text)` to make sure it's working – 41686d6564 stands w. Palestine Feb 24 '16 at 13:35

Regex Working on internet but doesn't work on VB.NET

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