Question: I have a piece of functionality that allows users to filter records based on their own status codes. In the menu, I have a custom filters section:

```
<h3>Custom Filters</h3>
 <br />
   <ul id="ui-ajax-tabs">
      @{ Html.RenderAction("GetGroups", "Manage");}
    </ul>

```

And my partial view looks like this:

```
@model IEnumerable<AllEngage.Model.Group>

@using AllEngage.Web.Helpers

@foreach (var group in Model)
{
    <li>
        <label for="@group.GroupName">@group.GroupName</label>
        @Html.DropDownList("GroupItems", group.GroupItems.ToSelectListItems())
    </li>
}

```

When an item is selected from a dropdownlist, I want an action method to fire in my controller:

```
[HttpGet]
public ActionResult Index(int page = 1, int groupFilterId = -1)

```

What would be the best way to go? Fire using json or perform a post back somehow?

Answer: 
you need to fire ajax call using jquery in click event of dropdown.
First chek on click event of dropdown if the value changes then call a jquery ajax call 
I am pasting the code of jquery .

```
 $.get("/Wk/Revision/@hTitle/@pageID/?langID=2", function (data) {
                    $("div#dAjaxContent").html(data);
                    $("div#dShow").css("visibility", "visible");
                    $("#dShow").dialog();
                });

```

// this is for ajax call . the dropdown check do it yourself.
"/Wk/Revision/@hTitle/@pageID/?langID=2"
this will call the controller method revision .
and next i think you will do.
I'd recommend doing a post request; you can build one using this:

<http://iridescence.no/post/Invoking-ASPNET-MVC-Actions-from-JavaScript-using-jQuery.aspx>

You could make an AJAX get request, or if you want to redirect away, you can change the JavaScript's window.location to point to the action you want, as in:

```
window.location = "/MyController/Index";

```