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Regular Expressions

Posted on 2006-11-01
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Last Modified: 2010-04-16
Hi

How can replace all text in tags that starts with

 <td background="Images/top.gif">

and parse the content of (my_own_string_text) variable

String my_own_string_text ='test.gif';

<td background='test.gif'>

vbturbo
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Question by:vbturbo
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5 Comments
 
LVL 18

Expert Comment

by:Ravi Singh
ID: 17848904
Hi, try:

using System.Text.RegularExpressions;

...

string inputData = "your html data here";
string my_own_string_text = "\"test.gif\"";

inputData = Regex.Replace(inputData, "(<td background=)\".+?\"([^>]*>)", "$1" + my_own_string_text + "$2");


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LVL 18

Expert Comment

by:Ravi Singh
ID: 17848949
This one would be better

inputData = Regex.Replace(inputData, "(<td.*?background=)\".+?\"", "$1" + my_own_string_text);
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LVL 18

Author Comment

by:vbturbo
ID: 17849522
Thanks Zephyr

one final question

if i want produce/ and parse single quotes instead of double quotes

like this

'test.gif'

instead of

"\"test.gif\""

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LVL 18

Accepted Solution

by:
Ravi Singh earned 500 total points
ID: 17849600
Hi, use the following, the regex should now match single and double quotes in the input:

...
inputData = Regex.Replace(inputData, "(<td.*?background=)(\"|').+?(\"|')", "$1" + my_own_string_text);

The replacement string just needs to be surrounded with whatever quotes you want to use, for single quotes use:

string my_own_string_text = "'test.gif'";

Hope this helps!
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LVL 18

Author Comment

by:vbturbo
ID: 17849960
Thanks a lot
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