Validation error message in IP

[jeevanreddy singireddy]

Hi All,
 
  I am trying to put a validation for firstname as First name should not contain space or number or special character. But it is not working as expected. If i give anyvalue it is showing validation error.

 Can you please help in this, how write a validation for  First name should not contain space or number or special character.

Thanks,
Jeevan

[Mike Berthold]

Hi Jeevan,

You need to use a regular expression to validate. A good site to test RegEx with a library of examples is regex101.com. You can test your expressions against a test list of inputs live which helps a lot. 

In this case, I was able to create the following that only allows alphabetic characters, does not allow spaces, only allows a capital letter as the first character, and makes sure the string is 3-25 characters long (the 2,24 below is for the character validation after the first letter):

^[A-Z]([A-Za-z]){2,24}$

I tested this in my environment and it validates correctly.

Thanks,

Mike