I'm having a hard time trying to create a right regular expression for the RegularExpressionValidator control that allows password to be checked for the following: - Is greater than seven characters. - Contains at least one digit. - Contains at least one special (non-alphanumeric) character.
Cant seem to find any results out there too. Any help would be appreciated! Thanks!
Maybe you will find this article helpful. You may try the following expression
^.*(?=.{8,})(?=.*[\d])(?=.*[\W]).*$
and the breakdown:
(?=.{8,}) - contains at least 8 characters(?=.*[\d]) - contains at least one digit(?=.*[\W]) - contains at least one special characterhttp://msdn.microsoft.com/en-us/library/ms972966.aspx
Search for "Lookaround processing" which is necessary in these examples. You can also test for a range of values by using .{4,8} as in Microsoft's example:
^(?=.*\d).{4,8}$
Try this
((?=.*\d)(?=.*[a-z])(?=.*[\W]).{6,20})
Description of above Regular Expression:
( # Start of group
(?=.*\d) # must contains one digit from 0-9
(?=.*[a-z]) # must contains one lowercase characters
(?=.*[\W]) # must contains at least one special character
. # match anything with previous condition checking
{7,20} # length at least 7 characters and maximum of 20
) # End of group
"/W" will increase the range of characters that can be used for password and pit can be more safe.
Use for Strong password with Uppercase, Lowercase, Numbers, Symbols & At least 8 Characters.
//Code for Validation with regular expression in ASP.Net core.
[RegularExpression(@"^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[^\da-zA-Z]).{8,15}$")]
Regular expression password validation:
@"^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[^\da-zA-Z]).{8,15}$"
