本文介绍如何在ASP.NET中实现多页面选择的问题。其具体思路很简单：用隐藏的INPUT记住每次选择的项目，在进行数据绑定时，检查保存的值，再在DataGrid中进行选中显示。下面时完整的代码和例子：

　　查看例子

　　SelectMultiPages.aspx

＜%@ Page EnableViewState="true" CodeBehind="SelectMultiPages.aspx.cs" Language="c#"
AutoEventWireup="false" Inherits="eMeng.Exam.SelectMultiPages" %＞
＜!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"＞
＜HTML＞
＜HEAD＞
＜title＞跨页面实现多选＜/title＞
＜META http-equiv="content-type" content="text/html; charset=gb2312"＞
＜style＞
* {FONT-SIZE:12PX}
#Status {text-align:left}
＜/style＞
＜script language="JAVASCRIPT"＞
function AddRemoveValues(oChk) {
//在处理这个地方需要注意的是：你保存的值应该具有唯一性，这样才能不会替换错误的项。
if(oChk.checked)
SelectMultiPage.HdnSelectedValues.value += "," + oChk.value;
else
SelectMultiPage.HdnSelectedValues.value = SelectMultiPage.HdnSelectedValues.value.replace("," + oChk.value,"");
}
＜/script＞
＜/HEAD＞
＜BODY＞
＜form id="SelectMultiPage" runat="server"＞
＜asp:datagrid id="DataGrid1" HorizontalAlign="Center" AutoGenerateColumns="False" Width="600px"
AllowPaging="True" runat="server"＞
＜AlternatingItemStyle BackColor="#EEEEEE"＞＜/AlternatingItemStyle＞
＜HeaderStyle BackColor="#AAAADD" Font-Bold="True" HorizontalAlign="Center"＞＜/HeaderStyle＞
＜PagerStyle HorizontalAlign="Right" Mode="NumericPages" Visible="True"＞＜/PagerStyle＞
＜Columns＞
＜asp:TemplateColumn HeaderText="选择"＞
＜ItemTemplate＞
＜input type="checkbox" runat="server" id="chkSelect"
value='＜%#DataBinder.Eval(Container.DataItem,"Title")%＞'/＞
＜/ItemTemplate＞
＜/asp:TemplateColumn＞
＜asp:TemplateColumn HeaderText="文章标题"＞
＜ItemTemplate＞
＜asp:Literal Text='＜%# DataBinder.Eval(Container.DataItem, "Title") %＞' runat="server" ID="TitleShow"/＞
＜/ItemTemplate＞
＜/asp:TemplateColumn＞
＜asp:TemplateColumn HeaderText="发布时间"＞
＜ItemTemplate＞
＜asp:Literal Text='＜%# DataBinder.Eval(Container.DataItem, "CreateDate").ToString() %＞' runat="server"/＞
＜/ItemTemplate＞
＜/asp:TemplateColumn＞
＜/Columns＞
＜/asp:datagrid＞
＜div align=center＞
＜asp:button id="Button1" runat="server" Text="得到所选的值"＞＜/asp:button＞
＜div id="Status"＞
＜asp:label id="Label1" runat="server"＞＜/asp:label＞
＜/div＞
＜INPUT id="HdnSelectedValues" type="hidden" name="HdnSelectedValues" runat="server"＞
＜/div＞
＜/form＞
＜/BODY＞
＜/HTML＞

SelectMultiPages.aspx.cs

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace eMeng.Exam
{
/// ＜summary＞
/// SelectMultiPages 的摘要说明。
/// ＜/summary＞
public class SelectMultiPages : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.HtmlControls.HtmlInputHidden HdnSelectedValues;
protected System.Web.UI.WebControls.DataGrid DataGrid1;

private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
if(!Page.IsPostBack)
BindData();
}
private void DataGrid1_PageIndexChanged(object source, DataGridPageChangedEventArgs e)
{
DataGrid1.CurrentPageIndex = e.NewPageIndex;
BindData();
}

void BindData()
{
OleDbConnection cn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source="
+ HttpContext.Current.Server.MapPath("aspx.mdb"));
OleDbDataAdapter da = new OleDbDataAdapter("Select Title, CreateDate from Document",cn);
DataSet ds = new DataSet();
da.Fill(ds);
DataGrid1.DataSource= ds;
DataGrid1.DataBind();
}