AJAX call on OnChange event in MVC

Question

I have to make an AJAX call on the onchange event of a dropdownlist which is part of a view. On the change event i need to call the database, do some calculations display th

Answer 1

Here is a general idea how you'd implement this.

    ... list of options




    
    <%= Html.RenderPartial("MyPartialView", Model) %>

Here is your controller action method.

[HttpPost]
public PartialViewResult GetPartialGraph(int id /* drop down value */)
{
    // do calculations whatever you need to do
    // instantiate Model object
    var model = myBusinessLogicService.DoCalculations(id);

    return PartialView("MyPartialView", model);
}

I think this is the answer you are looking for.