How to fetch data from string via regex?

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BKHariprasad-2463 asked May 10, '22 BKHariprasad-2463 commented May 12, '22

How to fetch data from string via regex?

Hell Team,
I have string s= "receivedfrom UDP: [10.36.15.60]:1024->[10.108.247.97]:162";
From this, I need to fetch 10.36.15.60 via regex.
Please help on this.

Thanks and Regards,
Hari

dotnet-csharp

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Answer 1 · 2022-05-10T13:22:13.227Z

Viorel-1 answered May 10, '22 BKHariprasad-2463 commented May 12, '22

Try a simple approach too:

 string s = "receivedfrom UDP: [10.36.15.60]:1024->[10.108.247.97]:162";
 var m = Regex.Match( s, @"^receivedfrom UDP: \[(.+?)\]" );
 string result = m.Success ? m.Groups[1].Value : null;

It can be improved using a more complex expression depending on problem details.

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BKHariprasad-2463 · May 11 at 06:58 AM

Hello Viorel,
Thanks for answer.
But regex is not working as there is a typo in my string. Refer attached image.
You can find some 19 spaces between receivedfrom and UDP?

Thanks and Regards,
Hari

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trap.png (46.2 KiB)

Viorel-1 BKHariprasad-2463 · May 11 at 07:40 AM

To support such strings too, try this pattern: @"^\s*receivedfrom\s+UDP:\s*\[(.+?)\]".

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BKHariprasad-2463 Viorel-1 · May 11 at 12:40 PM

Hello Viorel,
Thanks. It is working.

I have one more requirement:

From the above screenshot, I need to fetch the highlighted part and maintain in Dictionary key and value.
Like dictionary.Add("ifIndex.19", "19").

Please help on this via regex.

Thanks and Regards,
Hari

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trap.png (20.4 KiB)

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BKHariprasad-2463 · May 11 at 01:10 PM

Hello Viorel,
Thanks. It is working my initial request.

Best Regards,
Hari

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