jQuery Datatable，Cant'停止在选定列上排序

Question

我试图从jQuery数据表中的某些列中删除排序，但无法让它消失。我正在使用转发器来填充表。我设置可订购，可排序和可搜索为假的两列我试图删除排序但它仍然显示排序箭头。

<asp:Repeater runat="server" ID="rptTableData" OnItemCommand="rptTableData_ItemCommand">
    <HeaderTemplate>
        <div id="divFCTable">
            <table id="fcTable" class="table table-striped table-bordered table-hover">
                <thead>
                    <tr class="info">
                        <th></th>
                        <th>Certificate</th>
                        <th>Response Due Date</th>
                        <th>Frequency</th>
                        <th>Question</th>
                        <th>Requires Attachment</th>
                    </tr>
                </thead>
                <tbody>
            </HeaderTemplate>
            <FooterTemplate>
                </tbody>
                    <tfooter>
                        <tr class="info">
                            <th></th>
                            <th>Certificate</th>
                            <th>Response Due Date</th>
                            <th>Frequency</th>
                            <th>Question</th>
                            <th>Requires Attachment</th>
                        </tr>
                </tfooter>
                    </table>
                </div>
                </FooterTemplate>
                    <ItemTemplate>
                        <tr>
                            <td>
                                <asp:LinkButton runat="server" ID="lbDetails" CommandArgument='<%= Eval("CertItemName") %>' Text="Respond" />
                            </td>
                            <td runat="server" id="tdCertItemName"><%# Eval("CertItemName") %></td>
                            <td runat="server" id="tdResponseDueDate"><%# Eval("ResponseDueDate", "{0:MM/dd/yyyy}") %></td>
                            <td runat="server" id="tdFrequency"><%# Eval("Frequency") %></td>
                            <td runat="server" id="tdQuestionText"><%# Eval("QuestionText") %></td>
                            <td runat="server" id="tdRequireAttachment"><%# Convert.ToBoolean(Eval("RequireAttachment")) ? "Yes" : "No" %></td>
                        </tr>
            </ItemTemplate>
        </asp:Repeater>

<script>
    $(document).ready(function () {
        table = $('#fcTable').DataTable({
            "lengthMenu": [[10, 25, 50, -1], [10, 25, 50, "All"]],
            order: [[2, "asc"], [1, "asc"]],
            "columnDefs": [
                { "sortable": false, "targets": [0,4] },
                { "orderable": false, "targets": [0,4] },
                { "searchable": false, "targets": [0,4] }
            ],
            select: true,
            processing: true,
            "pageLength": 10,
            "rowCallback": function (row, data, index) {
                if (moment(new Date()).isAfter(data[2], 'day')) {
                    var $cell = $('td:eq(2)', row);
                    $cell.css('color', 'red');
                    $cell.attr('title', 'Overdue Response Submission');
                }
            }
        });
    })
</script>