ASP.NET获取<EmptyDataTemplate></EmptyDataTemplate>模板中的textBox控件值

前台

<EmptyDataTemplate>
                    <table>
                        <tr style="color: Black; background-color: SkyBlue; font-weight: bold;">
                            <th scope="col" style=" 10px;">
                                &nbsp;
                            </th>
                            <th scope="col" style=" 190px;">
                                名称
                            </th>
                            <th scope="col" style=" 194px;">
                                键值
                            </th>
                            <th>
                                &nbsp;
                            </th>
                        </tr>
                        <tr>
                            <td>
                            </td>
                            <td>
                                <asp:TextBox ID="txtName" runat="server" MaxLength="100" CssClass="input_text"></asp:TextBox>
                            </td>
                            <td>
                                <asp:TextBox ID="txtCode" runat="server" MaxLength="16" CssClass="input_text"></asp:TextBox>
                            </td>
                            <td>
                                <asp:LinkButton ID="linkBtnInsert" runat="server" CommandName="Add">新增</asp:LinkButton>
                            </td>
                        </tr>
                    </table>
                </EmptyDataTemplate>

后台

/// <summary>
    /// GridView事件
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void gvFieldValue_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName.Equals("Add"))
        {
            GridViewRow row = (GridViewRow)((e.CommandSource as LinkButton).NamingContainer);//获取值
            string txtName = (row.FindControl("txtName") as TextBox).Text;
            string txtCode = (row.FindControl("txtCode") as TextBox).Text;

         }

     }