How can I break lines from an Errormessage of a Data Annotation?

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How can I break lines from an Errormessage of a Data Annotation?

Asked 5 years, 9 months ago

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I have this property and the Data Annotations for it:

[Required(ErrorMessage = "Campo orbgiatório.")]
[RegularExpression("^(?=.*[A-Za-z])(?=.*\\d)[A-Za-z\\d]{8,}$", ErrorMessage = "The password must contain: \n * Pelo menos 8 caracteres; \n *Pelo menos uma letra. \n *Pelo menos um dígito. ")]
public string Password { get; set; }

I want to skip the lines of the error message between each password rule, so I’m using the \n, but it’s not working. The \n just disappears and the message doesn’t break the lines.

Try it the Windows way\r\n. \n is Unix style.

– Olivier Jacot-Descombes

2018/10/04 at 13:05
Btw. Why do you post an English Question on a Portuguese site?

– Olivier Jacot-Descombes

2018/10/04 at 13:07
Hello. Pf put your question in Portuguese, is on Sopt. Ever tried to put Environment.NewLine instead of \n?

– João Martins

2018/10/04 at 13:07
I confused the accounts, pardon :D

– jf.js

2018/10/04 at 13:14
Neither r n nor Enviroment.Newline worked, unfortunately.

– jf.js

2018/10/04 at 13:24
Where are you displaying this message? App Console, Windows App, or Web App?

– Leandro Angelo

2018/10/04 at 14:34
It is a web page. But using <br> of the html in the message, as you replied, did not work. The message only displays the <br>. Which is very strange, because in your example, it worked;

– jf.js

2018/10/08 at 20:54

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by Leandro Angelo • **9,330** points · Answer 1 · 2018-10-04T14:58:01+00:00

If you are only displaying this validation in a web application you can use html tags for this:

[Required(ErrorMessage = "Campo orbgiatório.")]
[RegularExpression(
        "^(?=.*[A-Za-z])(?=.*\\d)[A-Za-z\\d]{8,}$", 
        ErrorMessage = "<b>The password must contain:</b> <br> *Pelo menos 8 caracteres; <br> *Pelo menos uma letra. <br> *Pelo menos um dígito."
    )]
public string Password { get; set; }