How to extract Some Specific "Text/Numeric Values" from a String Accurately?

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Actually i got some HTML content from a Exchange website and i Splite code from "USD -US Dollar" onwards to a String .Now i want to get the values of Exchange rates ( 126.0 , 125.2739 ,130.0 ) from below String to a separate variables.I used "Index of" method.but due to repeating of same tags in the HTML content(in the string) it is hard to extract above values.

IF can someone help me on this matter. that would be a great help for me. Thanks in Advance!!!what i need is to extract above numeric values(126.0 , 125.2739 ,130.0) under USD-US Dollar tag.

XML

<b>USD -US Dollar</B></td>
<td bgcolor='gold' align='right' width='15%'>126.0</td>
<td bgcolor='gold' align='right' width='20%'>125.2739</td>
<td bgcolor='gold' align='right' width='20%'>130.0</td>
</tr>
</body>
</table>
</html>

Posted 15-Apr-12 4:16am

Hesha

Updated 15-Apr-12 4:21am

v4

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Mehdi Gholam · Accepted Answer · 2012-04-15T04:31:00

Solution 1

Use the following Regex:

C#

public static Regex regex = new Regex(
    @"\<td.*\>(?<num>.*)\<\/td\>",
    RegexOptions.IgnoreCase
    | RegexOptions.Multiline
    | RegexOptions.IgnorePatternWhitespace
    | RegexOptions.Compiled
    );

Which will give you named matches called num.

Posted 15-Apr-12 4:31am

Mehdi Gholam

Comments

Hesha 15-Apr-12 11:13am

Hey Thanks a Lot !!!that's works Nicely. But little problem i got. when code executes it return only first value and rest of values are not returned.

code i used is as follows :
{
comp = s;
}

Regex regex = new Regex(
@"\<td.*\>(?<num>.*)\<\/td\>",
RegexOptions.IgnoreCase
| RegexOptions.Multiline
| RegexOptions.IgnorePatternWhitespace
| RegexOptions.Compiled
);

Match match = regex.Match(comp);
if (match.Success)
{
string v = match.Groups[1].Value;

string r = match.Groups[2].Value;

string s = match.Groups[3].Value;
TextBox1.Text = v;
TextBox2.Text = r;
TextBox3.Text = s;

}
can you give me a suggestion for that prob.then that will be a great help for me.thanks !!!

Mehdi Gholam 15-Apr-12 11:19am

Use Matches : http://www.dotnetperls.com/regex-matches

Hesha 15-Apr-12 12:11pm

Thanks a lot Mehdi!!! Now it's works perfectly.again Thanks a Lot!!!

Mehdi Gholam 15-Apr-12 13:53pm

Great!

VJ Reddy 15-Apr-12 12:27pm

Nice answer. 5!

Mehdi Gholam 15-Apr-12 13:53pm

Thanks

Espen Harlinn 15-Apr-12 18:39pm

5'ed!

Mehdi Gholam 16-Apr-12 0:48am

Thanks

Nelek 15-Apr-12 19:16pm

+5

Mehdi Gholam 16-Apr-12 0:48am

Thanks

VJ Reddy · Accepted Answer · 2012-04-15T14:47:00

The Solution 1 given by Mehdi Gholam is excellent. Only thing is that .* given in the regex captures everything including < and > so that we get only the last number i.e. 130.0. So, .* has to be replaced by [^<>]*.
Further, after capturing all the numbers with matches, the captured number will be Groups[1] in each match. So, Groups[2], Groups[3] stated by OP in the comment above, may not give the correct result.
Hence, the following code can be used to set the values as required.

C#

Regex regex = new Regex(@"\<td[^<>]*\>([^<>]*)\<\/td\>",RegexOptions.IgnoreCase | RegexOptions.Multiline);
var matches = regex.Matches(comp);
if (matches.Count==3){
    string v=matches[0].Groups[1].Value;
    string r=matches[1].Groups[1].Value;
    string s=matches[2].Groups[1].Value;
}