Follow thse steps to use Grid.Mvc.Ajax

1. Include ~/Scripts/gridmvc-ext.js after your ~/Scripts/grimvc.js include.

2. Include ~/Content/ladda-bootstrap/ladda-themeless.min.css CSS after your Bootstrap CSS/LESS include.

3. Include Ladda-bootstrap Javascript via the ~/Scripts/ladda-bootstrap/ladda.min.js
 and ~/Scripts/ladda-bootstrap/spin.min.js.

4. Create a view model for you grid data, for example:
public Person
{
   public string FirstName { get; set; }
   public string LastName { get; set; }
}

5. Add a Razor partial view for your grid data that uses an AjaxGrid<T> as the model type, 
Where T is your view model type:

@using GridMvc.Html
@using GridMvc.Sorting
@model Grid.Mvc.Ajax.GridExtensions.AjaxGrid<Models.Person>

@Html.Grid(Model).Columns(columns =>
    {
      columns.Add(c => c.FirstName);
	  columns.Add(c => c.LastName);
    }).Sortable(true).WithPaging(10)

6. Add a controller action to retrieve the data for the first page of data that includes the Ajax pager HTML:

 public JsonResult Persons()
        {
			var vm = new List<Person>()
			{
				new Person() { FirstName = "John", LastName = "Doe" }
			}
			.AsQueryable();
            var ajaxGridFactory = new Grid.Mvc.Ajax.GridExtensions.AjaxGridFactory();
            var grid = ajaxGridFactory.CreateAjaxGrid(vm, 1, false);
        }

7. Add a controller action to retrieve data for paged items that returns a JsonResult without the Ajax page HTML:

 public JsonResult PersonsPaged(int page)
        {
			var vm = new List<Person>()
			{
				new Person() { FirstName = "John", LastName = "Doe" }
			}
			.AsQueryable();
            var ajaxGridFactory = new Grid.Mvc.Ajax.GridExtensions.AjaxGridFactory();
            var grid = ajaxGridFactory.CreateAjaxGrid(vm, page, true);
        }

8. Call the ajaxify Grid.Mvc.Ajax JavaScript plug-in method setting the non-paged and paged controller actions and optionally a form
to apply additional filtering to the grid. All input and select elements in the given form will be passed into your paged and non-paged controller actions:

 $(".grid-mvc").gridmvc().ajaxify({
                getPagedData: '/Home/Persons',
                getData : '/Home/PersonsPaged',
                gridFilterForm: $("#gridFilters")
            });