Question

I need to make a validation in a string with positional information using regex.

Example:

020005254877841100557810AAAAAA841158891BBBB

I need to get match position 5 until 10 and has to be only numbers.

How can I do this using RegEx?

Answer 1

hmm does it really have to be regex?
I would have done like this.

var myString = "020005254877841100557810AAAAAA841158891BBBB";
var isValid = myString.Substring(4, 5).All(Char.IsDigit);