Hi,
I'm looking for help with a regular expression and c#.
I want to remove all tags from a piece of html except the following.
<a>
<b>
<h1>
<h2>
<h3>
Also, <a> could be <a href="http://links.10026.com/?link=aa">aaa</a> etc.
Help would be appreciated, along with an explanation of the reg
expression created.
Thanks.HTML is complex. It would be better instead to say that you want to
*retrieve* *only* all of the following tags. That way, they are the only
tags the Regular Expression will have to look for.
The following will do this:
(?i)<\s*(a|br|h1|h2|h3)[^>]*>(?:([^<\r\n]+)(?=(?:<\/\1)|(?:\r?\n)))?
Note: Grouping is used in this Regular Expression. It groups the tag names
into Group 1, and the InnerText into Group 2, in case you need either of
these.
HTH,
Kevin Spencer
Microsoft MVP
.Net Developer
Presuming that God is "only an idea" -
Ideas exist.
Therefore, God exists.
"Spondishy" <spondishy@.tiscali.co.uk> wrote in message
news:1141639561.492632.61150@.z34g2000cwc.googlegroups.com...
> Hi,
> I'm looking for help with a regular expression and c#.
> I want to remove all tags from a piece of html except the following.
> <a>
> <b>
> <h1>
> <h2>
> <h3>
> Also, <a> could be <a href="http://links.10026.com/?link=aa">aaa</a> etc.
> Help would be appreciated, along with an explanation of the reg
> expression created.
> Thanks.
>
i use this in VB
Private Function stripHTML(ByVal strHTML) As String
Dim objRegExp As New System.Text.RegularExpressions.Regex("<(.|\n)+?>")
Return objRegExp.Replace(strHTML, "")
End Function
so the regex System.Text.RegularExpressions.Regex("<(.|\n)+?>")
does the trick
so in C# it would be ( i am a VB coder so don`t shoot me )
private string stripHTML(object strHTML)
{
System.Text.RegularExpressions.Regex objRegExp = new
System.Text.RegularExpressions.Regex("<(.|\n)+?>");
return objRegExp.Replace(strHTML, "");
}
regards
Michel Posseth [MCP]
"Spondishy" <spondishy@.tiscali.co.uk> wrote in message
news:1141639561.492632.61150@.z34g2000cwc.googlegroups.com...
> Hi,
> I'm looking for help with a regular expression and c#.
> I want to remove all tags from a piece of html except the following.
> <a>
> <b>
> <h1>
> <h2>
> <h3>
> Also, <a> could be <a href="http://links.10026.com/?link=aa">aaa</a> etc.
> Help would be appreciated, along with an explanation of the reg
> expression created.
> Thanks.
>
The problem with that Regular Expression (in this case) is that it simply
matches all tags in the page. It doesn't match InnerText, as he requested,
and it matches end tags as separate matches. It is excellent for, for
example, stripping HTML tags from a page, but not for his requirements.
HTH,
Kevin Spencer
Microsoft MVP
.Net Developer
Presuming that God is "only an idea" -
Ideas exist.
Therefore, God exists.
"m.posseth" <michelp@.nohausystems.nl> wrote in message
news:%23kpfPDSQGHA.5092@.TK2MSFTNGP11.phx.gbl...
>
> i use this in VB
> Private Function stripHTML(ByVal strHTML) As String
> Dim objRegExp As New System.Text.RegularExpressions.Regex("<(.|\n)+?>")
> Return objRegExp.Replace(strHTML, "")
> End Function
> so the regex System.Text.RegularExpressions.Regex("<(.|\n)+?>")
> does the trick
> so in C# it would be ( i am a VB coder so don`t shoot me )
> private string stripHTML(object strHTML)
> {
> System.Text.RegularExpressions.Regex objRegExp = new
> System.Text.RegularExpressions.Regex("<(.|\n)+?>");
> return objRegExp.Replace(strHTML, "");
> }
> regards
> Michel Posseth [MCP]
>
>
> "Spondishy" <spondishy@.tiscali.co.uk> wrote in message
> news:1141639561.492632.61150@.z34g2000cwc.googlegroups.com...
>
Oops :-)
i just read "Stripping html tags from text" and missed the exclusion part
my code will convert
<html>
<head>
<body>
<table>
<tr><td>bla bla </td></tr>
</table>
</body>
</head>
</html>
into
bla bla
regards
Michel
"Kevin Spencer" <kevin@.DIESPAMMERSDIEtakempis.com> wrote in message
news:eISasoSQGHA.4900@.TK2MSFTNGP09.phx.gbl...
> The problem with that Regular Expression (in this case) is that it simply
> matches all tags in the page. It doesn't match InnerText, as he requested,
> and it matches end tags as separate matches. It is excellent for, for
> example, stripping HTML tags from a page, but not for his requirements.
> --
> HTH,
> Kevin Spencer
> Microsoft MVP
> .Net Developer
> Presuming that God is "only an idea" -
> Ideas exist.
> Therefore, God exists.
> "m.posseth" <michelp@.nohausystems.nl> wrote in message
> news:%23kpfPDSQGHA.5092@.TK2MSFTNGP11.phx.gbl...
>
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