How an asynchronous request for server-side validation works

Question

How can I asynchronously check the database for a value in a form field?

For example, I have a text box in which users enter the user ID to check if it is available or not, I want to check the input data against the database table asynchronously without refreshing the page. How can i do this?

Thanks in advance

Answer 1

In ASP.NET MVC 3, you can use the [Remote] attribute.