W3C validation for server-side form tag

Question

I've checked my website html validation in w3.org and got this error

Bad value for attribute action on element form: Must be non-empty.

but my form is asp.net server-side form and I can't set action atribute.

How can I solve this error?

Inclinatory

Answer 1

This is an old post, but for future reference in ASP.NET one can do the following to avoid blank action attributes:

<form action="#" runat="server">

This will validate with W3C and does not require you to do any special coding to detect the page url you are currently on.

Mccay

Actually, this is problematic. If you attempt to do a post with the action="#" solution, you'll get an HTTP verb server-side error. – Lovegrass

@Lovegrass I've been using this solution for a while now in ASP.NET without your reported problem, any idea of why this happens? – Mccay

May be a problem with the version or setting of IIS (I suspect it's a security setting to prevent certain types of script injection)? Is your page doing any postbacks? – Lovegrass

@Lovegrass Yes, postbacks are also ok. Perhaps you should list your setup and I can try and recreate your bug? – Mccay

Answer 2

form1.Action = Request.Url.AbsoluteUri;

this is working for me

Administrator

Answer 3

Omit the attribute action. According to HTML5 drafts, it is not required, but if present, its value must be non-empty. Reference: WHATWG HTML5 draft, description of action attribute.

Clubbable

In ASP.NET you cannot omit the action attribute, if you code <form runat="server"> it will render as <form action=""> ; its just the way it works. See my response for a better solution. – Mccay

Every time I learn something new about ASP.NET I hate it some more. – Coracle