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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}.*" />
captainsac
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MG.
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1 Answers1

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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..
Anirudha
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  • @Gary.S i had used this form `^(.*?[a-z]){2,}.*?$` – Anirudha Nov 26 '12 at 10:45
  • My mistake, it works however it has been answered in other questions on the site – Gary.S Nov 26 '12 at 10:49
  • This didn't work for me but put me on the right path. i ended up using: ^((?=(.*\d){2,})(?=(.*[a-z]){2,})(?=(.*[A-Z]){2,})(?=(.*[!@#$%&+~?]){2,})).{10,25}$ – MG. Nov 26 '12 at 12:23