Can anyone help me with a regex to allow atleast one special character, one uppercase, one lowercase.
This is what I have so far:
Your regex
^.*(?=.{8,})(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^&+=]).*$
should actually work just fine, but you can make it a lot better by removing the first .*:
^(?=.{8,})(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^&+=]).*$
will match any string of at least 8 characters that contains at least one lowercase and one uppercase ASCII character and also at least one character from the set @#$%^&+= (in any order).