在线等,急,请各位高手帮忙看一下,为什么不能自已刷新..快下岗了...

<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional" > <ContentTemplate >


                        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="2"
                            DataKeyNames="id" GridLines="Vertical"
                            Width="100%"  Font-Size="12px">
                            <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
                            <Columns>
                                <asp:BoundField DataField="id" HeaderText="id" Visible="False" />
                                <asp:TemplateField HeaderText="选择">
                                <ItemStyle Width="50px" />
                    <ItemTemplate>
                        <asp:CheckBox ID="mycheck" runat="server" /> <asp:Timer id="Timer1" runat="server" Interval="1000" OnTick="Timer1_Tick">
  </asp:Timer>
                    </ItemTemplate>
                </asp:TemplateField>

                            </Columns>
                            <RowStyle BackColor="#F3F3F3" Height="22px" />
                            <EditRowStyle BackColor="#2461BF" />
                            <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
                            <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
                            <HeaderStyle BackColor="#525252" Font-Bold="True" ForeColor="White" Height="22px" />
                            <AlternatingRowStyle BackColor="White" />
                        </asp:GridView> </ContentTemplate>


                        </asp:UpdatePanel>

后台代码.

void adminshow()
    {
        sqlshow = "select * from orderline  order by id desc";
        DataSet ds = dbobj.GetDataSet(sqlshow, "newsclass1");
        DataView dv = ds.Tables[0].DefaultView;
        PagedDataSource pds = new PagedDataSource();

        AspNetPager1.RecordCount = dv.Count;
        pds.DataSource = dv;
        pds.AllowPaging = true;
        pds.CurrentPageIndex = AspNetPager1.CurrentPageIndex - 1;
        pds.PageSize = AspNetPager1.PageSize;
        this.GridView1.DataSource = pds;
        this.GridView1.DataBind();

    }

    protected void Timer1_Tick(object sender, EventArgs e)
    {
        adminshow();
    }
--------------------编程问答-------------------- 有报什么错没？猜测如下
            1.操作数据库是否代码有误，看看获取DS的方法对着没
            2.试试直接绑定到GRIDVIEW上，是不是绑定那里有问题

补充：.NET技术 ,  C#