@divakar.reddy Regular Expression Itself is a vast topic. It is Easy To learn but it takes a lot more effort to master it. So I would basically recommend you the following Links.
- Get a Head Start with What is Regular Expressions and How to Match a Particular String, and Also Learn What are the Requirements of Matching a Labelled String.
https://blog.usejournal.com/regular-expressions-a-complete-beginners-tutorial-c7327b9fd8eb
- Test Out and experiment what you have learnt from the above topic in this website, Most of the people use this website to check if all regex Matches are working in the right way.
- Lastly if you feel that you have got the Grisp of the regular Expressions, You can try out this website that has Regex Challeneges.
http://play.inginf.units.it/#/
Simultaneously, You can also work on the Matches Activity that is available in UiPath and also there are other .net Codes that can fetch you the Matching Values.
Hope this reply may help you attain knowledge of what you wanted to Seek