Regex to check if a string contains only digits and is 11 characters / digits long?

Question

I am currently using:

if (Regex.IsMatch(searchValue, @"^\d{11}.*") && searchValue.Length == 11) { // Do something } 

How can I change the regex to also check the length, and not use the && operator?

Thanks in advance.

Answer 1

Change template to

 @"^\d{11}$" 

Gotta do it

Answer 2

Use the following expression:

^\d{11}$

Answer 3

I usually use the Expresso tool to design regex patterns, especially as they get complicated. It shows a breakdown that clearly states what each bit of the regular expression does. Check out the other posters (Marc / Logicnp) for an answer to the OP issue.