I am trying to display data in table using dropdown, but it is not getting populating 

Below is html view

DropDownList

<h4>Item Search</h4>
<hr />
<div class="form-group">
    @Html.LabelFor(model => model.CodeItem, "Select Item", htmlAttributes: new { @class = "control-label col-md-6" })
    <div class="col-md-10">
        @Html.DropDownList("codeitem", null, "Select Item", htmlAttributes: new { @class = "form-control", @id = "select2-3" })
        @Html.ValidationMessageFor(model => model.CodeItem, "", new { @class = "text-danger" })
    </div>
</div>

table

            <section class="content">
                <div class="row">
                    <div class="col-xs-12">
                        <div class="box box-primary">
                            <div class="box-header">
                                <h3 class="box-title">Roles List</h3>
                            </div>
                            <div class="box-body">
                                <table id="example1" class="table table-bordered table-striped">
                                    <thead>
                                        <tr>
                                            <th>CustomerId</th>
                                            <th>Name</th>
                                        </tr>
                                    </thead>
                                    <tbody>
                                        @foreach (var item in Model.Items)
                                        {
                                            <tr>
                                                <td>@Html.DisplayFor(module => item.CodeItem)</td>
                                                <td>@Html.DisplayFor(module => item.Descriptionitem)</td>
                                                <td></td>
                                            </tr>
                                        }
                                    </tbody>
                                    <tfoot>
                                    </tfoot>
                                </table>
                            </div>
                        </div>
                    </div>
                </div>
            </section>
        </div>
    </div>
</div>
<script type="text/javascript" src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<script type="text/javascript">
    $(function () {
        $('[id*=codeitem]').change(function () {
            var codeitem = $(this).find('option:selected').val();
            if (codeitem != null && codeitem != '') {
                $.getJSON('Item/GetItem', { country: codeitem }, function (response) {
                    if (response.length > 0) {
                        $("[id*=example1] tbody").empty();
                        var row;
                        $.each(response, function (index, item) {
                            row += "<tr><td>" + item.Codeitem + "</td><td>" + item.Descriptionitem + "</td></tr>"
                        })
                        $("[id*=example1] tbody").append(row);
                    }
                });
            }
        });
    });
</script>

Controller

public ActionResult GetItem(string codeitem)
{
    List<ItemModel> items = new List<ItemModel>();
 
    using (SqlConnection con = new SqlConnection("data source=SERVER1\\SQLEXPRESS;initial catalog=SilverProduction;integrated security=True;MultipleActiveResultSets=True;"))
    {
        string query = "SELECT Codeitem,Descriptionitem FROM ItemMasterFile";
        using (SqlCommand cmd = new SqlCommand(query))
        {
            cmd.Connection = con;
            cmd.Parameters.AddWithValue("@Codeitem", codeitem);
            con.Open();
            using (SqlDataReader sdr = cmd.ExecuteReader())
            {
                while (sdr.Read())
                {
                    items.Add(new ItemModel
                    {
                             CodeItem = Convert.ToInt32(sdr["CodeItem"]),
                             Descriptionitem = Convert.ToString(sdr["Descriptionitem"]),
                    });
                }
            }
            con.Close();
        }
    }
    return Json(items, JsonRequestBehavior.AllowGet);
}