[置顶] Datalist嵌套datalist，页面传值，加密，数据绑定

 <asp:DataList ID="dlMajor" runat="server" CssClass="dllist" OnItemDataBound="dlMajor_ItemDataBound">

            <ItemTemplate>

                <div class="div_major">

                    <%#Eval("major_name")%>

                    <asp:HiddenField ID="hf_major" runat="server" Value='<%#Eval("major_url") %>'></asp:HiddenField>

                </div>

                <asp:DataList ID="dlClass" runat="server" CssClass="dllist" OnItemDataBound="dlClass_ItemDataBound">

                    <ItemTemplate>

                        <div class="div_class">

                            <%#Eval("class_name")%>

                            <asp:HiddenField ID="hf_class" runat="server" Value='<%#Eval("class_url") %>'></asp:HiddenField>

                        </div>

                        <ul>

                            <asp:DataList ID="dlStudent" runat="server" CssClass="dllist" OnItemDataBound="dlClass_ItemDataBound">

                                <ItemTemplate>

                                    <li>

                                        <div class="num left">

                                            <%#Eval("id")%>、</div>

                                            <%#new checkFiles.common.utils().GetInfo(Eval("student_url").ToString())%>

                                        </div>

                                    </li>

                                </ItemTemplate>

                            </asp:DataList>

                        </ul>

                    </ItemTemplate>

                </asp:DataList>

            </ItemTemplate>

            <FooterTemplate>

                <%--    <%if(dlMajor.Items.Count<=0) %>--%>

            </FooterTemplate>

        </asp:DataList>

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using checkFiles.common;

namespace checkFiles

{

    public partial class center : System.Web.UI.Page

    {

        protected void Page_Load(object sender, EventArgs e)

        {

            string path = "";

            if (Request.QueryString["path"] != null && Request.QueryString["path"].ToString().Trim().Length > 0)

            {

                path = Server.HtmlDecode((Request.QueryString["path"].ToString().Trim()));

            }

            if (!IsPostBack)

            {

                utils util = new utils();

                dlMajor.DataSource = util.GetMajorName(path);

                dlMajor.DataBind();

                if (dlMajor.Items.Count <= 0)

                {

                    this.Panel1.Visible = true;

                }

                else

                {

                    this.Panel1.Visible = false;

                }

            }

        }

        protected void dlMajor_ItemDataBound(object sender, DataListItemEventArgs e)

        {

            utils util = new utils();

            HiddenField hf_major = (HiddenField)e.Item.FindControl("hf_major");

            if (hf_major != null)

            {

                string path = hf_major.Value.ToString();

                if (e.Item.ItemType == ListItemType.EditItem || e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)

                {

                    DataList dlClass = (DataList)e.Item.FindControl("dlClass");

                    dlClass.DataSource = util.GetClassName(path);

                    dlClass.DataBind();

                }

            }

        }

        protected void dlClass_ItemDataBound(object sender, DataListItemEventArgs e)

        {

            utils util = new utils();

            HiddenField hf_class = (HiddenField)e.Item.FindControl("hf_class");

            if (hf_class != null)

            {

                string path = hf_class.Value.ToString();

                if (e.Item.ItemType == ListItemType.EditItem || e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)

                {

                    DataList dlStudent = (DataList)e.Item.FindControl("dlStudent");

                    dlStudent.DataSource = util.GetStudentName(path);

                    dlStudent.DataBind();

                }

            }

        }

    }

}