I need to validate input into a textblock, and I'm I'm think a regular expression might be suitable.
The criteria is as follows:
numeric . (AV or AI or SCH)numeric
e.g. 1234.AV4321 or 18327.AI1928 or 10293.SCH1928
The first digit of the numeric parts can not be a zero. 01929.AV01929 is not a valid input.