asp.net 4.0 regularExpressionValidator

Question

I need to modify my regularexpressionvalidator code to require the user to meet the following password requirements:

a. Contains at least 2 uppercase characters: A, B, C etc.

b. Contains at least 2 lowercase characters: a, b, c, etc.

c. Contains at least 2 numbers: 1,2,3,4,5,6,7,8,9,0

d. Contains at least 2 special characters, i.e.

! @ # $ % ^ & * ( ) _ + | ~ - = \ ` { } [ ] : " ; ' < > ? , . /

Current code only requires a 10 character password length:

<asp:RegularExpressionValidator ID="valPassword" runat="server" ControlToValidate="txtPassword" ErrorMessage="Error: 10 character required password length" ValidationExpression=".{10}.*" />

stackoverflow.com/a/1489337/701062 seems to be pretty close to what you are after — Gary.S
– Gary.S, Commented Nov 26, 2012 at 10:44

Anirudha · Accepted Answer · 2012-11-26 11:02:49Z

You can use this regex

^(?=^.{10}$)(?=^(.*?[A-Z]){2,}.*?$)(?=^(.*?[a-z]){2,}.*?$)(?=^(.*?\d){2,}.*?$)(?=^(.*?[!@#$%^&]){2,}.*?$).*?$ -------- --------------------- --------------------- ------------------- -------------------------- | | | | |->checks for 2 or more special characters | | | |->checks for 2 or more digits | | |->checks for 2 or more small letters | |->checks for 2 or more capital words | |->checks for 10 words..

My mistake, it works however it has been answered in other questions on the site
This didn't work for me but put me on the right path. i ended up using: ^((?=(.*\d){2,})(?=(.*[a-z]){2,})(?=(.*[A-Z]){2,})(?=(.*[!@#$%&+~?]){2,})).{10,25}$

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