DataPager分页问题，ListView重新绑定数据源后DataPager未回到初始页？
如题：
ListView用ObjectDataSource做数据源

当根据查询条件重新绑定后，DataPager没有回到初始页

就是原来我如果选择了第三页，ListView正常显示出来

这时候根据查询条件ListView数据源变了，但是DataPager还是停留在了第三页，怎么让它回到初始页

 <asp:HiddenField ID="hf_category" runat="server" />

        <div class="alPage">

            <asp:DataPager ID="dp_party" runat="server" PagedControlID="repList" PageSize="2"

                EnableViewState="false">

                <Fields>

                    <asp:TemplatePagerField>

                        <PagerTemplate>

                            共<%= DataCount%>条记录， 当前第<asp:Label runat="server" ID="CurrentPageLabel" Text="<%# Container.TotalRowCount>0 ? (Container.StartRowIndex / Container.PageSize) + 1 : 0 %>" />/<asp:Label

                                runat="server" ID="TotalPagesLabel" Text="<%# Math.Ceiling ((double)Container.TotalRowCount / Container.PageSize) %>" />页，

                        </PagerTemplate>

                    </asp:TemplatePagerField>

                    <asp:NextPreviousPagerField ButtonType="Link" ShowFirstPageButton="true" ShowPreviousPageButton="true"

                        ShowLastPageButton="false" ShowNextPageButton="false" FirstPageText="首页" ButtonCssClass="PageCss"

                        PreviousPageText="上页" />

                    <asp:NumericPagerField />

                    <asp:NextPreviousPagerField ButtonType="Link" ShowNextPageButton="true" ShowLastPageButton="true"

                        ShowFirstPageButton="false" ShowPreviousPageButton="false" LastPageText="末页"

                        ButtonCssClass="PageCss"

                  &n