using System.Web.Mvc;

using System.Web.UI;

namespace Messenger

{

    public class AjaxViewPage<TModel> : ViewPage<TModel> where TModel : class

    {

        /// <summary>

        /// The control that must be rendered as result of the AJAX request.

        /// </summary>

        public string RenderedControlId

        {

            get

            {

                object controlId = null;

                ViewData.TryGetValue("__RenderedControlId", out controlId);

                return (string)controlId;

            }

        }

        protected override void Render(HtmlTextWriter writer)

        {

            if (RenderedControlId == null)

            {

                // The complete view must be rendered.

                // We keep the default mechanism

                base.Render(writer);

            }

            else

            {

                // Only the given control is rendered

                Control control = FindControl(RenderedControlId);

                control.RenderControl(writer);

            }

        }

    }

}

namespace Messenger.Views.Shared

{

    public partial class Index : AjaxViewPage<IndexViewData>

    {

    }

}

public class AjaxController : Controller

{

    public BinaryResult Binary(string contentType, byte[] data)

    {

        return new BinaryResult() { ContentType = contentType, Data = data };

    }

    public AjaxViewResult Ajax(string selector)

    {

        return new AjaxViewResult().Add(selector, View());

    }

    public AjaxViewResult Ajax(string selector, ActionResult actionResult)

    {

        return new AjaxViewResult().Add(selector, actionResult);

    }

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

    {

        return new AjaxViewResult().Add(selector, viewResult, controlId);

    }

}

return Ajax("#panel", View("Index"), "ReadContactPanel")

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

public static class AjaxExtensions

{

    public static string Ajaxify(this AjaxHelper helper, params string[] selectors)

    {

        StringBuilder builder = new StringBuilder();

        builder.Append("<script type=\"text/javascript\">$(document).ready(function() { ");

        foreach (string selector in selectors)

        {

            builder.Append("$('" + selector + "').ajaxify();");

        }

        builder.Append("});</script>");

        return builder.ToString();

    }

}

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="New.ascx.cs" Inherits="Messenger.Views.Messages.New" %>

<form method="post" action="<%= Url.Action("Send", new { id = ViewData.Model } ) %>">

    <textarea name="messagetext" cols="28" rows="3"></textarea>

    <br />

    <%= Html.SubmitButton("send", "Send") %>

</form>

<%= Ajax.Ajaxify("#panel form") %>