Validate strong passwords using RegularExpressionValidator in Asp .Net

 In this article we will see how to enforce users to create strong passwords. To validate for strong passwords we will use RegularExpressionValidator with REGEX. For this example we will take three different scenarios:  

1. Validate strong password which must have 8-10 characters long with at least one numeric character.
2. Validate strong password which must have 8-10 characters long with at least one numeric character, one alphabet character and one special character.
3. Validate strong password which must have 8-10 characters long with at least one numeric character, one upper case character and one special character.

1. Remove Blank spaces accuired by validation messages.
2. Show Images in error messages.
3. Apply Custom CSS to ValidationSummary Control.