Using Compiled Regular Expressions

Sign in to leave a comment.

• 

  Diptimaya Patra16y agoPosted Feb 22, 2010, 3:18 AM

  Hey, I have a small doubt, is it like Match will subset the valid typed text. What I understood from the above example is like you entered: kirtan12345 and match is: kirtan So how is it useful taking the value of Match and displaying in MessageBox. Could you have a good sample.
  • 

    Diptimaya Patra16y agoPosted Feb 22, 2010, 8:48 AM

    Yes, I understand the performance issue, but if Match is giving the output as valid characters then how will it be useful validating the user input. As Regular Expressions are used for Validating user input, is it possible to have the validation check using Match.
  • 

    Kirtan Patel16y agoPosted Feb 22, 2010, 7:11 AM

    Friend, Intention of this article is not to show how value is matched and to show it in Message Box ..but intention of this article is to show How Compiled RegEx can be useful to improve the performance of application. like when we use normal RegEx object as usual without specifying RegExOptions.Compiled then code will be converted to MSIL at run time. and if RegEx pattern to be matched is Complex that it can affect the performance of the application while converting to MSIL at Runtime. so when we use RegExOptions.Compiled option RegEx code will be converted to MSIL at compile time so it will not take time at run time to be converted into MSIL and that will result in faster execution of code :) Hope it Solves your doubt :)
  • 

    Kirtan Patel16y agoeditedPosted Feb 22, 2010, 10:17 AMEdited Feb 22, 2010, 10:21 AM

    yes We can use Regular Expressions to Validate User Input . Some time it can used to Extract Text Patterns that Matches With RegEx Pattern Also for example you want to retrieve onlt email Addresses from some big text file in that case we can use regex another example -> We can use Regular Expressions to Extract Tags From HTML Source codes also.We can also use regex to implement Syntax High Lighting like visual Studio..