如何从asp.net访问纯html表的单元格内容

I have a table:

我有一个表:

<table id="trTable" runat="server" clientidmode="Static">
        <thead>
            <tr>
                <th style="display:none">
                    ID
                </th>
                <th style="width: 112px">
                    Item
                </th>
                <th style="width: 40px; text-align: left">
                    Price
                </th>
                <th style="width: 24px; text-align: center">
                </th>
                <th style="width: 26px; text-align: center">
                    Qty
                </th>
                <th style="width: 24px; text-align: center">
                </th>
                <th style="width: 40px; text-align: right">
                    Total
                </th>
            </tr>
        </thead>
        <tbody>
        </tbody>
    </table>
<table id="trTable"