namespace MvcApplication1.Models
{
 public class Team
 {
  public string Preletter { get; set; }
  public string Name { get; set; }
 }
}

@{
 ViewBag.Title = "Index";
 Layout = "~/Views/Shared/_Layout.cshtml";
}
<h2>Index</h2>
<div>
 <a href="#" id="a">通过jQuery异步</a> <br/>
</div>
<div id="result">
</div>
@section scripts
{
 <script type="text/javascript">
  $(function() {
   $('#a').click(function() {
    $.ajax({
     url: '@Url.Action("Index","Home")',
     data: { pre: 'B' },
     type: 'POST',
     success: function(data) {
      $('#result').empty().append(data);
     }
    });
    return false;
   });
  });
 </script>
}

using System.Collections.Generic;
using System.Linq;
using System.Web.Mvc;
using MvcApplication1.Models;
namespace MvcApplication1.Controllers
{
 public class HomeController : Controller
 {
  public ActionResult Index()
  {
   return View();
  }
  [HttpPost]
  public ActionResult Index(string pre)
  {
   var result = GetAllTeams().Where(t => t.Preletter == pre).ToList();
   ViewBag.msg = "通过jQuery异步方式到达这里~~";
   return PartialView("TeamY", result);
  }
  private List<Team> GetAllTeams()
  {
   return new List<Team>()
   {
    new Team(){Name = "巴西队", Preletter = "B"},
    new Team(){Name = "克罗地亚队", Preletter = "K"},
    new Team(){Name = "巴拉圭", Preletter = "B"},
    new Team(){Name = "韩国", Preletter = "K"}
   };
  }
 }
}

@model IEnumerable<MvcApplication1.Models.Team> 
@{
 var result = string.Empty;
 foreach (var item in Model)
 {
  result += item.Name + ",";
 }
}
@ViewBag.msg.ToString()
<br/>
@result.Substring(0,result.Length - 1)

@{
 ViewBag.Title = "Index";
 Layout = "~/Views/Shared/_Layout.cshtml";
}
<h2>Index</h2>
<div>
 @Ajax.ActionLink("通过MVC Ajax Helper","Load","Home", new {pre = "K"}, new AjaxOptions(){UpdateTargetId = "result1"})
</div>
<div id="result1">
</div>

using System.Collections.Generic;
using System.Linq;
using System.Web.Mvc;
using MvcApplication1.Models;

namespace MvcApplication1.Controllers
{
 public class HomeController : Controller
 {
  public ActionResult Index()
  {
   return View();
  }
  public ActionResult Load(string pre)
  {
   var result = GetAllTeams().Where(t => t.Preletter == pre).ToList();
   ViewBag.msg = "通过MVC Ajax Helper到达这里~~";
   return PartialView("TeamY", result);
  }
  private List<Team> GetAllTeams()
  {
   return new List<Team>()
   {
    new Team(){Name = "巴西队", Preletter = "B"},
    new Team(){Name = "克罗地亚队", Preletter = "K"},
    new Team(){Name = "巴拉圭", Preletter = "B"},
    new Team(){Name = "韩国", Preletter = "K"}
   };
  }
 }
}

public ActionResult GetItemTree(string title, int itemid, int"res_Item_Resource_R"] = res_Item_Resource_R;
   res_Item_Resource_R.AddParameters = new System.Collections.Specialized.NameValueCollection();
   res_Item_Resource_R.AddParameters.Add("title", title);
   res_Item_Resource_R.AddParameters.Add("itemid", itemid.ToString());

   ViewResult vr = new ViewResult
   {
    ViewData = ViewData,
    MasterName = "",
   };
   return vr;
  }

 $(function () {
  var id = '<%=itemid %>';
  $.ajax({
   type: "POST",
   url: "/Student/GetItemTree",
   data: { title: '<%=Model.Name %>', itemid: id, page: 1 },
   beforeSend: function (data) { //取回数据前
    $("#itemTree").html('<span style="padding:5">数据加载中...</span>');
   },
   error: function (data) { //发生错误时
//    debugger;
   },
   success: function (data) { //成功返回时
    $("#itemTree").html(data);
   }
  });

<div style="float: left">
  <%=Html.AjaxPager(resItemResourceBefore, "itemTree", "GetItemTree", "Student")%>
 </div>