var successFunction = function (data, textStatus) {

    // The data is "selector1&&&&HTML1&&&&selector2&&&&HTML2...."

    var views = data.toString().split('&&&&');

    for (var i=0; i<views.length; i+=2)

    {

        jQuery(views[i]).html(views[i+1]);

    }

};

using System.Collections.Generic;

using System.Web;

using System.Web.Mvc;

namespace Messenger

{

    public class AjaxViewResult : ActionResult

    {

        public IList<KeyValuePair<string, ActionResult>> NestedActionResults { get; set; }

        public override void ExecuteResult(ControllerContext context)

        {

            HttpResponseBase response = context.HttpContext.Response;

            foreach (KeyValuePair<string, ActionResult> nestedActionResult in NestedActionResults)

            {

                string selector = nestedActionResult.Key;

                ActionResult actionResult = nestedActionResult.Value;

                response.Write(selector);

                response.Write("&&&&");

                actionResult.ExecuteResult(context);

                response.Write("&&&&");

            }

        }

    }

}

public AjaxViewResult Add(string selector, ViewResult viewResult, string controlId)

{

    object model = viewResult.ViewData.Model;

    if ((model != null) || (controlId != null))

    {

        ViewDataDictionary viewData = new ViewDataDictionary(viewResult.ViewData);

        if (model != null)

        {

            viewData.Model = model;

        }

        if (controlId != null)

        {

            viewData["__RenderedControlId"] = controlId;

        }

        viewResult.ViewData = viewData;

    }

    return Add(selector, viewResult);

}

public AjaxViewResult Add(string selector, ActionResult actionResult)

{

    if (NestedActionResults == null)

    {

        NestedActionResults = new List<KeyValuePair<string, ActionResult>>();

    }

    NestedActionResults.Add(new KeyValuePair<string, ActionResult>(selector, actionResult));

    return this;

}

public ActionResult Add()

{

    // On valide la création en reconstituant

    // le contact via les infos du formulaire.

    // On met à jour la datasource puis la

    // liste des contacts et le contact sélectionné.

    DataContext context = new DataContext();

    Contact contact = new Contact();

    contact.Name = Request.Form["name"];

    contact.Email = Request.Form["email"];

    contact.Photo = context.Contacts.First().Photo;

    context.AddContact(contact);

    IndexViewData model = new IndexViewData();

    model.Contacts = context.Contacts.ToList();

    model.SelectedContact = contact;

    ViewData.Model = model;

    return new AjaxViewResult().Add("#panel", View("Index"), "ReadContactPanel")

        .Add("#contacts", View("Index"), "ContactsPanel");

}