问ajax调用后不会呈现部分视图

EN

[HttpPost]
public ActionResult GetXlFile()
{
    List<ListMatchDetails> lstPreview = new List<ListMatchDetails>();

    if (System.Web.HttpContext.Current.Request.Files.AllKeys.Any())
    {
        var xlFile = System.Web.HttpContext.Current.Request.Files["FileToPreview"];
        HttpPostedFileBase filebase = new HttpPostedFileWrapper(xlFile);
        if (null != filebase && filebase.ContentLength > 0)
        {
            if (String.Compare(filebase.ContentType, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", true, System.Globalization.CultureInfo.InvariantCulture) == 0)
            {
                using (Stream stream = filebase.InputStream)
                {
                    IExcelDataReader reader = null;

                    if (filebase.FileName.EndsWith(".xls"))
                    {
                        reader = ExcelReaderFactory.CreateBinaryReader(stream);
                    }
                    else if (filebase.FileName.EndsWith(".xlsx"))
                    {
                        reader = ExcelReaderFactory.CreateOpenXmlReader(stream);
                    }

                    reader.IsFirstRowAsColumnNames = true;
                    DataSet dsResult = reader.AsDataSet();
                    DataTable dtResult = dsResult.Tables[0];
                    if (dtResult.Rows.Count > 0)
                    {
                        foreach (DataRow dr in dtResult.Rows)
                        {
                            ListMatchDetails lmd = new ListMatchDetails();
                            lmd.FirstName = (dr[0] != DBNull.Value) ? dr[0].ToString() : string.Empty;
                            lmd.LastName = (dr[1] != DBNull.Value) ? dr[0].ToString() : string.Empty;

                            lstPreview.Add(lmd);
                        }
                    }
                    reader.Close();
                }
            }
        }
    }

    return PartialView("_ExcelGrid", lstPreview);
}

@using app.Models;
@model IEnumerable<ListMatchDetails>

@{
    if (Model.Count() > 0)
    {
        ListMatchDetails row = Model.FirstOrDefault();
        <table class="table table-hover table-responsive scrollable table-striped ">
            <thead id="tableHeader">
                <tr>

                    <td>
                        @Html.LabelFor(x => row.FirstName)
                    </td>
                    <td>
                        @Html.LabelFor(x => row.LastName)
                    </td>

                </tr>
            </thead>
            <tbody class="pre-scrollable">

                @foreach (var record in Model)
                {
                    <tr>

                        <td>
                            @Html.ValueForModel(record.FirstName) 

                        </td>
                        <td>
                            @Html.ValueForModel(record.LastName)
                        </td>

                    </tr>
                }
            </tbody>
        </table>
    }
}

$('#btnPreview').click(function () {
                var formData = new FormData();
                var files = $("#btnbrowse").get(0).files;
                if (files.length > 0) { formData.append("FileToPreview", files[0]); }
                $.ajax({
                    url: '/ListMatch/GetXlFile',
                    type: 'POST',
                    dataType: 'json',
                    data: formData,
                    processData: false,
                    contentType: false,
                    success: function (result) {
                        //$('#record').html(result)
                        $('._ExcelGrid').json(result);
                    },
                    error: function () {
                        //alert('Click Called');
                    }
                });
            });