Question

Can PHP array passed POST method to catch in ASP.NET MVC?

Query string: WebAccess/ArrayTest?val[]=1&val[]=2&val[]=3

I write: ActionResult ArrayTest (String[] val)

But this only works if the query string to remove the “[]”

Answer 1

The built in DefaultModelBinder in ASP.NET MVC can’t handle rails/php/jquery1.4 style array posts (which is what you’re referring to with val[]=1&val[]=2&val[]=3).

You have to either create a custom modelbinder (google it, lots of examples) or adding indices inside the bracket like so:

val[0]=1&val[1]=2&val[2]=3

And the indices must not have any missing numbers.

I have fixed this with a script that on submit of the form just adds the indices. i.e. in jQuery:

$('form').find('input, select, textarea').attr('name', function(index, old) {
    return old.replace(/\[\]/, '[' + index + ']');
});