How to call a Controller method from javascript in MVC3?

Question

Im using MVC3 architecture, c#.net. I need to compare text box content(User ID) with the database immediately when focus changes to the next field i.e., Password field. So I

Answer 1

here is what you could do:

Given that you have controller called AccountController and action called CheckPassword that accepts parameter string password, you could put this in your view:

$('#texboxId').blur(function() {
    $.ajax({
        url: '/Account/CheckPassword',
        data: { password: $('#texboxId').val() },
        success: function(data) {
            // put result of action into element with class "result"
            $('.result').html(data);
        },
        error: function(){
            alert('Error');
        }
    });
});

Your controller action would approximately look like this:

public class AccountController : Controller
{
    public ActionResult CheckPassword(string password)
    {
        bool passwordIsCorrect = //do your checking;
        string returnString = "whatever message you want to send back";
        return Content(returnString);
    }
}