Question

I have the following string fromat:

session=11;reserID=1000001

How to get string array of number?

My code:

 var value = "session=11;reserID=1000001";
 var numbers =  Regex.Split(value, @"^\d+");

Answer 1

You probably were on the right track but forgot the character class:

Regex.Split(value, @"[^\d]+");

You can also write it shorter by using \D+ which is equivalent.

However, you’d get an empty element at the start of the returned array, so caution when consuming the result. Sadly, Regex.Split() doesn’t have an option that removes empty elements (String.Split does, however). A not very pretty way of resolving that:

Regex.Replace(value, @"[^\d;]", "").Split(';');

based on the assumption that the semicolon is actually the relevant piece where you want to split.

Quick PowerShell test:

PS> 'session=11;reserID=1000001' -replace '[^\d;]+' -split ';'
11
1000001

Another option would be to just skip the element:

Regex.Split(...).Skip(1).ToArray();