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？
通过自己的各种实验，得到方法如下：
前台代码是这样的：（但是就是因为后台代码的问题，会造成标题中的问题）
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="RepositoryList.aspx.cs" Inherits="ZWW.Web._2010.Knowledge.RepositoryList" %> <%@ Register Assembly="AspNetPager" Namespace="Wuqi.Webdiyer" TagPrefix="asp" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <asp:Repeater runat="server" ID="repList_root"> <HeaderTemplate> <ul> </HeaderTemplate> <ItemTemplate> <li> <asp:LinkButton ID="lb_root" runat="server" CommandName="Root" OnCommand="LinkButton_Command" Text='<%#Eval("CATEGORY_NAME")%>' CommandArgument='<%#Eval("CATEGORY_ID")%>'></asp:LinkButton></li> </ItemTemplate> <FooterTemplate> </ul></FooterTemplate> </asp:Repeater> </div> <div> <asp:ListView runat="server" ID="repList" DataSourceID="ods_repository"> <LayoutTemplate> <div> <ul> <asp:PlaceHolder ID="itemPlaceholder" runat="server"></asp:PlaceHolder> </ul> </div> </LayoutTemplate> <ItemTemplate> <li> <%#Eval("Q_TITLE")%></li> <li> <%#Eval("A_CONTENT")%></li> </ItemTemplate> </asp:ListView> <asp:HiddenField ID="hf_category" runat="server" /> <div class="alPage"> <asp:DataPager ID="dp_party" runat="server" PagedControlID="repList" PageSize="2"> <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" NextPageText="下页" /> </Fields> </asp:DataPager> <asp:ObjectDataSource ID="ods_repository" runat="server" SelectMethod="GetData" TypeName="ZWW.BLLNEW.ZZK.PageBusiness" MaximumRowsParameterName="pageSize" StartRowIndexParameterName="startIndex" EnablePaging="True" SelectCountMethod="GetAmount" EnableViewState="false"> <SelectParameters> <asp:ControlParameter ControlID="hf_category" Name="category_id" PropertyName="Value" Type="String" /> </SelectParameters> </asp:ObjectDataSource> </div> </div> </form> </body> </html>
后台：
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using ZWW.BLL.Sites.Model; using ZWW.BLL; using ZWW.BLL.IndexWeb; using ZWW.BLLNEW.ZZK; namespace ZWW.Web._2010.Knowledge { public partial class RepositoryList : System.Web.UI.Page { public int DataCount { get { return dp_party.TotalRowCount; } } PageBusiness PB = new PageBusiness(); protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { PageInit(); } } void PageInit() { repList_root.DataSource = PB.GetRoot(); repList_root.DataBind(); if (repList_root.Items.Count > 0) { LinkButton temp = repList_root.Items[0].FindControl("lb_root") as LinkButton; hf_category.Value = temp.CommandArgument.ToString(); } } protected void LinkButton_Command(Object sender, CommandEventArgs e) { hf_category.Value = e.CommandArgument.ToString(); dp_party.SetPageProperties(0, 2, false); } } }
关键性的代码就是： dp_party.SetPageProperties(0, 2, false);
在这里重新对DataPager的属性进行设置（设置为回到初始页，pagesize为2），然后ObjectDataSource再通过反射进行数据的绑定
这里有个地方注意的是：ObjectDataSource的数据绑定是在按钮回发事件之后