ASP.NET and javascript validation

Question

Dear guys,
I want to know how to password history from database  and check in asp.net
check following critriea.
1) Password history should be set to 5 or more
2) Password should be case-sensitive.
3) Enforce password expiry including Minimum age and maximum age (min. age 1 & max. age 30 days) This can be changed on run-time.

Answer 1

Use:

string[] items = fileName.Split('_');

items[0] will be the portion to the first _ and then items[1] will be the portion from the first _ to the second _.

These will exclude the underscores themselves.

Answer 2

You could deal with that situation (or even two hyphen delimiters) by replacing this line:

   string[] items = fileName.Split('_');

with this:

   string[] items = fileName.Split(new char[]{'_', '-'});