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?

Accepted Answer

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.

W3C validation for server-side form tag

Solution

Problem