Question

I have a Link element in the Master Page. This element is initially invisible.
Upon a certain action in one of the content page, I need to make that Link element visible.
I am looking into ways of how this could be done. Can I do it from my Controller method or will I have to do it via ajax?

Answer 1

To manipulate the UI in mvc you need to use javascript. If your “certain action” are involved with the server I think you need to use ajax:

$.ajax({
    url: "yourController/yourAction",
    dataType: 'json',
    success: function(json){
        var domEl = document.getElementById('theIdOfyourLink');

        if(json.show){
            domEl.style.display = 'block';
        }else{
            domEl.style.display = 'none';
        }
    }
});

If you action are only involved with the client you can use only javascript. At the end you can playing with css to make visible or not your link:

var yourfun = function(show){
    var domEl = document.getElementById('theIdOfyourLink');

    if(show){
        domEl.style.display = 'block';
    }else{
        domEl.style.display = 'none';
    }

}