Regular Expression error message

Question

Regular Expression error message

eddy28 1

Hello,

I wanted to include a regular expression to detail the parameters for a password, but I wanted to include an error message in order to see which parameters are fulfilled or not. Ive tried multiple regular expressions but that is illegal. How would I be able to implement this without complicating it further and creating a new class etc.

This is my code for the regular expression: [RegularExpression(@"^(?=.*[a-z])|(?=.*[A-Z])|(?=.*\d)|(?=.*[^a-zA-Z\d])$", ErrorMessage = "Password should have atleast one lowercase | atleast one uppercase, should have atleast one number, should have atleast one special character")]

while I want it to look similar to this:

Where it updates whichever parameters are missing or fulfilled, how would I be able to do this the most effective way?
Thanks!

Duane Arnold 3,216 Reputation points

2021-06-09T15:55:31.427+00:00

You trying to create your own registration page?
eddy28 1 Reputation point

2021-06-10T06:42:34.32+00:00

yes. I am
Yiyi You - MSFT 521 Reputation points

2021-06-10T07:00:13.08+00:00

Hi,@eddy28 ,

What about using custom-attributes?You can check the password in IsValid method,and return the error message you want in ValidationResult.
Duane Arnold 3,216 Reputation points

2021-06-10T11:41:05.247+00:00

If you are doing it yourself, then use data annotations and the validationhelper in the view.

https://www.dotnettricks.com/learn/mvc/understanding-viewmodel-in-aspnet-mvc

https://www.aspsnippets.com/Articles/RegularExpression-Data-Annotation-example-Perform-validations-using-RegularExpression-Data-Annotation-in-ASPNet-MVC.aspx
Duane Arnold 3,216 Reputation points

2021-06-10T11:48:01.997+00:00

That was not meant for but rather the OP. I am posting from my be with a tablet laying in an adjustable bed using a tablet can be tricky sometimes. :)
Duane Arnold 3,216 Reputation points

2021-06-10T12:00:58.683+00:00

You can also do a series of regular expression code in the controller and put errors in the ModelStare collection too that will make the
ModelState invalid. Just return the view using Validationhelper in the view. If you use data annotations, you can have more than one attribute for a property, if you have read my other reply. :)

Your answer

Duane Arnold 3,216 Reputation points

2021-06-09T15:55:31.427+00:00

You trying to create your own registration page?
eddy28 1 Reputation point

2021-06-10T06:42:34.32+00:00

yes. I am
Yiyi You - MSFT 521 Reputation points

2021-06-10T07:00:13.08+00:00

Hi,@eddy28 ,

What about using custom-attributes?You can check the password in IsValid method,and return the error message you want in ValidationResult.
Duane Arnold 3,216 Reputation points

2021-06-10T11:41:05.247+00:00

If you are doing it yourself, then use data annotations and the validationhelper in the view.

https://www.dotnettricks.com/learn/mvc/understanding-viewmodel-in-aspnet-mvc

https://www.aspsnippets.com/Articles/RegularExpression-Data-Annotation-example-Perform-validations-using-RegularExpression-Data-Annotation-in-ASPNet-MVC.aspx
Duane Arnold 3,216 Reputation points

2021-06-10T11:48:01.997+00:00

That was not meant for but rather the OP. I am posting from my be with a tablet laying in an adjustable bed using a tablet can be tricky sometimes. :)
Duane Arnold 3,216 Reputation points

2021-06-10T12:00:58.683+00:00

You can also do a series of regular expression code in the controller and put errors in the ModelStare collection too that will make the
ModelState invalid. Just return the view using Validationhelper in the view. If you use data annotations, you can have more than one attribute for a property, if you have read my other reply. :)

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Regular Expression error message

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