Extract numbers from string to create digit only string [duplicate]

Answer 1

Not familiar enough with .NET for exact code. Nonetheless, two approaches would be:

• Cast it as an integer. If the non-digit characters are at the end (i.e. 21389abc), this is the easiest.
• If you have intermixed non-digit characters (i.e. 1231a23v) and want to keep every digit, use the regex [^\d] to replace non-digit characters.