部分视图在ajax更新后不会呈现

asp MVC 3.

在初始渲染，一切都是伟大的。我输入一个我知道存在的搜索字符串并单击搜索按钮，部分视图(_searchresult)消失。我在开发人员工具的网络选项卡中进行了测试，我看到ajax按照预期返回结果。因此ajax调用得到了正确的结果，但没有呈现。我去了

localhost/home/_searchresult 

但是它只显示[]。

视图:

    @model Tracker.Models.PaginatedList<TrespassTracker.Models.PersonViewModel>
        <div id="search-index">
                <div class="editor-field">   
                    <label>First Name:</label>
                    @Html.TextBox("FirstName")
                    <label style = "margin-left: 15px;">Last Name:</label>
                    @Html.TextBox("LastName", "", new { style = "margin-right: 15px;" })
                </div>            
                <div id="search-controls-index">
                      <input type="button" id="searchbtn" class="skbutton" value="Search" />
                      <input type="button" id="addPersonbtn" class="skbutton" value="Add New Person" onclick="location.href='@Url.Action("AddPerson", "Person")'"/>
                </div>
        </div>
        <div id="result-list-index">  
            @Html.Partial("_SearchResult", Model)
         </div>
        <div id="paging-controls">
            <div id="paging-controls-left">
            @{  if(Model.HasPreviousPage)
                    {
                        @Html.ActionLink("<< Previous", "Index", new { page = (Model.PageIndex - 1) });                                
                    }
                    if (Model.HasNextPage)
                    {
                        @Html.ActionLink("Next >>", "Index", new { page = (Model.PageIndex + 1) });  
                    }
            }
            </div>
            <div id="paging-controls-right">
                @{ int PageNumber = @Model.PageIndex + 1; }
                Page: @PageNumber of @Model.TotalPages
            </div>
        </div>
   </div>

jquery:

$(document).ready(function(){    
        $("#searchbtn").on('click', function () {
            var fsname = $("#FirstName").val();
            var ltname = $("#LastName").val();
                $.ajax({
                    type: 'GET',
                    url: "Home/_SearchResult",
                    data: { fname: fsname, lname: ltname },
                    success: function (data) {
                        $("#result-list-index").html(data);
                    },
                    error: function () {
                        $("#result-list-index").html("An error occurred while trying to retrieve your data.");
                    }
                });
        });
  });

控制器:

    public ActionResult Index(int? page)
    {
        const int PAGESIZE = 10;
        var peopleList = repo.GetPeople();
        var pagedPeopleList = new PaginatedList<PersonViewModel>(peopleList, page ?? 0, PAGESIZE);

        return View(pagedPeopleList);
    }

    public JsonResult _SearchResult(string fname, string lname)
    {
        var peopleList = repo.GetSearchResult(fname, lname);
        return Json(peopleList, JsonRequestBehavior.AllowGet);
    }

========== 编辑 ===========

我认为_searchresult方法是错误的，所以我把它改成了PartialResult方法:

    public PartialViewResult _SearchResult(string fname, string lname)
    {
        var peopleList = repo.GetSearchResult(fname, lname);
        //return Json(peopleList, JsonRequestBehavior.AllowGet);
        return PartialView("_SearchResult");
    }

现在部分在索引页上呈现，但它返回由于内部错误500而导致的失败通知。我对它进行了跟踪，并在部分视图中的模型上发现了一个null错误。这是偏导数。指示的错误位置在foreach，对象未设置为实例…我认为这意味着它返回一个null模型。

@model Tracker.Models.PaginatedList<TrespassTracker.Models.PersonViewModel>

                    <table class="data-table">
                        <tr>
                            <th>
                                FirstName
                            </th>
                            <th>
                                LastName
                            </th>
                            <th>
                                Gender
                            </th>
                            <th>
                                DOB
                            </th>
                            <th>
                                School
                            </th>
                            <th>
                                IsStudent
                            </th>
                            <th></th>
                        </tr>
                    @foreach (var item in Model) {
                        <tr>
                            <td>
                                @Html.DisplayFor(modelItem => item.FirstName)
                            </td>
                            <td>
                                @Html.DisplayFor(modelItem => item.LastName)
                            </td>
                            <td>
                                @Html.DisplayFor(modelItem => item.Gender)
                            </td>
                            <td>
                                @Html.DisplayFor(modelItem => item.DOB)
                            </td>
                            <td>
                                @Html.DisplayFor(modelItem => item.School)
                            </td>
                            <td>
                                @Html.DisplayFor(modelItem => item.IsStudent)
                            </td>
                            <td>
                                @Html.ActionLink("Edit", "Edit", new { /* id=item.PrimaryKey */ }) |
                                @Html.ActionLink("Details", "Details", new { /* id=item.PrimaryKey */ })
                            </td>
                        </tr>
                    }
                    </table>

public ActionResult _SearchResult(string fname, string lname)
{
    var peopleList = repo.GetSearchResult(fname, lname);
    //Is peopleList the right model type? If not, create your model here
    return View(peopleList);
}