Question

What is the Regular Expression Validator for only Letters and Numbers in asp.net?

I need to enter only 0-9,a-z and A-Z. I don’t want to allow any special characters single or double quotes etc. I am using asp.net 3.5 framework.

I tried ^[a-zA-Z0-9]+$ and ^[a-zA-Z0-9]*$. They are not working.

Any help will be appreciated.

Answer 1

Try the following.

^[a-zA-Z0-9]+$

go to this example and also alphanumerics for more

then try this

^[a-zA-Z0-9]*$

If length restriction is necessary use

^[a-zA-Z0-9]{0,50}$

This will match alphanumeric strings of 0 to 50 chars.