How to find special characters in a text

[Boban (Boban Stojmenovic)]

@iamwsumit

if any user enter special characters in textbox then how can I find special characters in textbox and how can I remove them.

@How to check any special characters in Text Discuss

Just lowercase - pattern = [^a-z]
lowercase Uppercase and space character - pattern = [^a-zA-Z ]

Lowercase, Uppercase, Numbers 0-9 - pattern = [^a-zA-Z0-9]