Regular expression to convert substring to link

Question

Hi,

i need a Regular Expression to convert a a string to a link.i wrote something but it doesnt work in asp.net.i couldnt solve and i am new in Regular Expression.This function converts (bkz: string) to (bkz: show.aspx?td=string)

Dim pattern As String = "<bkz[a-z0-9$-$&-&.-.ö-öı-ış-şç-çğ-ğü-ü\s]+)>"
Dim regex As New Regex(pattern, RegexOptions.IgnoreCase)
str = regex.Replace(str, "<a href=""show.aspx?td=$1""><font color=""#CC0000"">$1</font></a>")

Answer 1

Your regexp is in trouble because of a ')' without '('

Would:

<bkz:\s+((?:.(?!>))+?.)>

work better ?

The first group would capture what you are after.

Answer 2

Thanks Vonc,Now it doesnt raise error but also When i assign str to a Label.Text,i cant see the link too.Forexample after i bind str to my label,it should be viewed in view-source ;

<span id="Label1">(bkz: <a href="http://www.mysite.com?t=here"&gt;here&lt;/a&gt;)&lt;/span&gt;

But now,it is in viewsource source;

<span id="Label1">(bkz: here)</span>

Answer 3

Generic remarks on your code: beside the lack of opening parentheses, you do redundant things: $-$ isn't incorrect but can be simplified into $ only. Same for accented chars.
Everybody will tell you that font tag is deprecated even in plain HTML: favor span with style attribute.

And from your question and the example in the reply, I think the expression could be something like:

\(bkz: ([a-z0-9$&.öışçğü\s]+)\)

the replace string would look like:

(bkz: <a href=""show.aspx?td=$1""><span style=""color: #C00"">$1</span></a>)

BUT the first $1 must be actually URL encoded.

Answer 4

Thanks VonC and Philho. Ur Solutions worked.