jQTreeTable在Asp.net中的应用

树形结构是我们在写程序中会常用到的一种方法。如：部门组织结构、新闻产品类别结构等等。JQuery中有一个不错的组件，叫JQTreeTable，能简单直观的在Table中显示树形结构，如下图所示：

通过JQTreeTable与Asp.net的配合，我们可以把这种效果应用到自己的系统中。

一、先来看一下一个栏目的数据表的设计：

数据表结构：

CREATE TABLE [dbo].[Catalog](
    [Id] [int] IDENTITY(1,1) NOT NULL,                                        --序号
    [Name] [varchar](255) COLLATE Chinese_PRC_CI_AS NOT NULL,                --名称
    [DisplayName] [varchar](255) COLLATE Chinese_PRC_CI_AS NOT NULL,        --显示名称/路径
    [ImageUrl] [varchar](255) COLLATE Chinese_PRC_CI_AS NULL,                --图片
    [Comment] [varchar](255) COLLATE Chinese_PRC_CI_AS NULL,                --备注
    [NodeCode] [varchar](255) COLLATE Chinese_PRC_CI_AS NOT NULL,            --节点编码
    [ParentCode] [varchar](255) COLLATE Chinese_PRC_CI_AS NOT NULL,            --上级节点编码
    [Url] [varchar](255) COLLATE Chinese_PRC_CI_AS NULL,                    --链接
    [IsLeaf] [bit] NOT NULL CONSTRAINT [DF_NewsCatalog_IsLeaf]  DEFAULT (1),--是否叶子节点
    [OrderId] [int] NOT NULL CONSTRAINT [DF_Catalog_OrderId]  DEFAULT (0)   --排序
) 

数据示例：

二、再来看一下页面的代码：

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Collections.Generic;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using NHibernate.Expression;
using YKSoft.CMS.Entity;
namespace WebSite.Admin
{
    public partial class CatalogList : BasePage
    {
        //JQTreeTable要的参数
        protected string strMap = "";

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                BindDataList();
            }
        }

        private void BindDataList()
        {
            //根据OrderId,NodeCode asc 排序获得的数据记录集
            IList<Catalog> catalogs = Catalog.FindAllOrderByOrderId();

            IList<Catalog> items = new List<Catalog>();

            //对原有的数据进行重新排序
            foreach (Catalog item in catalogs)
            {
                if (String.IsNullOrEmpty(item.ParentCode))
                {
                    //添加到排序后的数据集中
                    items.Add(item);
                    //生成JQTreeTable要的参数格式
                    if (strMap == "")
                        strMap = "0";
                    else strMap += ",0";
                    //如果不是叶子节点，对子节点进行排序
                    if (item.IsLeaf == false)
                    {
                        ResetItems(catalogs, items, item.NodeCode);
                    }
                }
            }
            rptList.DataSource = items;
            rptList.DataBind();
        }

        /**//// <summary>
        /// 递归排序
        /// </summary>
        /// <param name="oItems">原数据集</param>
        /// <param name="nItems">排序后的数据集</param>
        /// <param name="parentCode">上级编码</param>
        private void ResetItems(IList<Catalog> oItems, IList<Catalog> nItems, string parentCode)
        {
            //保存当前排序后的数据集的记录数
            int CurrentNum = nItems.Count;
            
            foreach (Catalog item in oItems)
            {
                if (item.ParentCode == parentCode)
                {
                    //生成JQTreeTable要的参数格式
                    if (strMap == "")
                        strMap = "0";
                    else strMap += "," + CurrentNum.ToString();
                    //添加到排序后的数据集中
                    nItems.Add(item);
                    //如果不是叶子节点，对子节点进行排序
                    if (item.IsLeaf == false)
                    {
                        ResetItems(oItems, nItems, item.NodeCode);
                    }
                }
            }
        }

        protected void lbtnAdd_Click(object sender, EventArgs e)
        {
            Response.Redirect("CatalogAddEdit.aspx", true);
        }

        protected bool GetVisible(object url)
        {
            if (String.IsNullOrEmpty(url.ToString()))
                return false;
            else return true;
        }

        //删除记录
        protected void rptList_ItemCommand(object source, RepeaterCommandEventArgs e)
        {
            try
            {
                if (e.CommandName.ToLower() == "delete")
                {
                    int Id = Convert.ToInt32(e.CommandArgument.ToString());
                    Catalog.DeleteAll(new int[] { Id });

                    Response.Redirect("CatalogList.aspx", true);
                }
            }
            catch
            {
                JsAlert("数据删除出错！");
            }
        }

        protected void rptList_ItemDataBound(object sender, RepeaterItemEventArgs e)
        {
            try
            {
                Catalog item =(Catalog)e.Item.DataItem;
                LinkButton lbtn =(LinkButton) e.Item.FindControl("lbtnDel");
                if (item == null || lbtn == null)
                    return;

                if (item.IsLeaf)
                {
                    lbtn.OnClientClick = "return confirm('确定要删除该记录吗？');";
                }
                else
                {
                    lbtn.Enabled = false;
                    lbtn.OnClientClick = "alert('该栏目存在子栏目，不能删除!');return false;";
                }

            }
            catch
            {

            }
        }
    }
}

<%@ Page Language="C#" AutoEventWireup="true" Codebehind="CatalogList.aspx.cs" Inherits="WebSite.Admin.CatalogList" %>

<%@ Register Assembly="YKSoft.Web.UI.WebControls" Namespace="YKSoft.Web.UI.WebControls.EasyPager"
    TagPrefix="cc2" %>
<%@ Register Assembly="YKSoft.Web.UI.WebControls" Namespace="YKSoft.Web.UI.WebControls.SmartGridView"
    TagPrefix="cc1" %>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>无标题页</title>
    <!--Jquery脚本-->
    <script type="text/javascript" src="../Js/jquery-1.2.6.js"></script>
    <!--jQTreeTable脚本-->
    <script type="text/javascript" src="Js/jQTreeTable.js"></script>
     <!--jQTreeTable样式-->
    <style type="text/css">
    * {}{ font-family: 宋体,Arial, Verdana; }
h1 {}{ text-align: center; }
p {}{ font-size: 10pt; }
    .collapsed {}{
    DISPLAY: none
}
#tablemain {}{
cellspacing:0px;
 cellpadding:0px;
  rules:all;
   border:0px;
  color:#333333;
  border-style:Solid;
  width:100%;
  border-collapse:collapse;
}
#treetable TD {}{
    PADDING-RIGHT: 0px; PADDING-LEFT: 0px; PADDING-BOTTOM: 0px; FONT: 9pt 宋体; CURSOR: pointer; PADDING-TOP: 0px
}
.ttimage {}{
    PADDING-RIGHT: 0px; PADDING-LEFT: 0px; PADDING-BOTTOM: 0px; MARGIN: 0px; VERTICAL-ALIGN: bottom; WIDTH: 16px; BORDER-TOP-STYLE: none; PADDING-TOP: 0px; BORDER-RIGHT-STYLE: none; BORDER-LEFT-STYLE: none; HEIGHT: 22px; BORDER-BOTTOM-STYLE: none
}
.parimg {}{
    PADDING-RIGHT: 0px; PADDING-LEFT: 0px; PADDING-BOTTOM: 0px; MARGIN: 0px; VERTICAL-ALIGN: bottom; WIDTH: 16px; BORDER-TOP-STYLE: none; PADDING-TOP: 0px; BORDER-RIGHT-STYLE: none; BORDER-LEFT-STYLE: none; HEIGHT: 16px; BORDER-BOTTOM-STYLE: none
}
.preimg {}{
    PADDING-RIGHT: 0px; PADDING-LEFT: 0px; PADDING-BOTTOM: 0px; MARGIN: 0px; VERTICAL-ALIGN: bottom; WIDTH: 16px; BORDER-TOP-STYLE: none; PADDING-TOP: 0px; BORDER-RIGHT-STYLE: none; BORDER-LEFT-STYLE: none; HEIGHT: 22px; BORDER-BOTTOM-STYLE: none
}
.parimg {}{
    CURSOR: pointer
}
.even {}{
    
}
.over {}{
    BACKGROUND-COLOR: #dfe7ed
}
.selected {}{
    
}
</style>
<script type="text/javascript" >
$(function(){
    var ei = $("#large");
    ei.hide();
    $(".CatalogImg").mousemove(function(e){
        ei.css({top:e.pageY,left:e.pageX}).html('<img style="border:0px solid gray;" src="' + this.src + '" />').show();
    }).mouseout( function(){
        ei.hide();
    })
});
</script>
</head>
<body>
    <form id="form1" runat="server">
   <!--JQTreeTable-->
   <script type="text/javascript">
$(function(){
    //声明数组
    var map = [<%=strMap %>];
    //声明参数选项
    var options = {openImg: "images/TreeTable/tv-collapsable.gif", shutImg: "images/TreeTable/tv-expandable.gif", leafImg: "images/TreeTable/tv-item.gif", lastOpenImg: "images/TreeTable/tv-collapsable-last.gif", lastShutImg: "images/TreeTable/tv-expandable-last.gif", lastLeafImg: "images/TreeTable/tv-item-last.gif", vertLineImg: "images/TreeTable/vertline.gif", blankImg: "images/TreeTable/blank.gif", collapse: false, column: 0, striped: false, highlight: true, onselect: function(target){}};
    
   if(map!=null&&map.length>0)
    {
      //根据参数显示树
      $("#treetable").jqTreeTable(map, options);
    }
});
</script>

        <div>
            <div class="menutbl" id="header">
                <table cellspacing="0" cellpadding="0">
                    <tr>
                        <td style=" 8px">
                        </td>
                        <td nowrap="nowrap" style="font:9pt 宋体">
                            <asp:LinkButton ID="lbtnAdd" runat="server" OnClick="lbtnAdd_Click">
                          <img src="images/Action/add.gif" border="0" align="absmiddle"/>添加</asp:LinkButton></td>
                        <th>
                        </th>
                    </tr>
                </table>
            </div>
            <div style=" 100%">
                <asp:Repeater ID="rptList" runat="server" OnItemCommand="rptList_ItemCommand" OnItemDataBound="rptList_ItemDataBound">
                    <HeaderTemplate>
                        <table id="tablemain" style=" 100%">
                            <thead>
                                <tr class="PageGridHeader" >
                                    <th style="220px">
                                        栏目名称</th>
                                    <th>
                                        栏目路径</th>
                                    
                                    <th style="150px">
                                        链接</th>
                                    <th style="100px">
                                        栏目图片</th>
                                     <th style="40px">
                                        排序</th>
                                     <th style="40px">
                                        添加</th>
                                     <th style="40px">
                                        移动</th>
                                    <th style="40px">
                                        编辑</th>
                                    <th style="40px">
                                        删除</th>
                                </tr>
                            </thead>
                            <tbody id="treetable">
                    </HeaderTemplate>
                    <ItemTemplate>
                       <tr style="background-color: #EFF3FB; height: 22px;">
                            <td>
                                <%#Eval("Name") %>
                            </td>
                            <td>
                                <%#Eval("DisplayName") %>
                            </td>
                           
                            <td>
                                <%#Eval("Url")%>
                            </td>
                            <td align="center">
                                <asp:Image ID="img" Height="22px" CssClass="CatalogImg" Width="80px" runat="server" ImageUrl='<%#String.Format("../{0}",Eval("ImageUrl"))%>'
                                    Visible='<%#GetVisible(Eval("ImageUrl")) %>'></asp:Image>
                            </td>
                            <td align="center"> <%#Eval("OrderId")%>
                            </td>
                            <td align="center">
                                 <a href="CatalogAddEdit.aspx?NodeCode=<%#Eval("NodeCode") %>"><img alt="添加" src="images/Action/add.gif" style="border:0px" /></a>
                            </td>
                            <td align="center">
                                 <a href="CatalogMove.aspx?ID=<%#Eval("ID") %>"><img alt="移动" src="images/Action/move.gif" style="border:0px" /></a>
                            </td>
                           <td  align="center"><a href="CatalogAddEdit.aspx?ID=<%#Eval("ID") %>"><img alt="编辑" src="images/Action/edit.gif" style="border:0px" /></a>
                            </td>
                            <td  align="center">
                                 <asp:LinkButton ID="lbtnDel" OnClientClick="return confirm('确定要删除该记录吗？');" CommandName="Delete" CommandArgument='<%#Eval("Id")%>' runat="server"><img alt="删除" src="images/Action/delete.gif" style="border:0px" /></asp:LinkButton>
                            </td>
                        </tr>
                    </ItemTemplate>
                    <AlternatingItemTemplate> 
                     <tr style="background-color: White; height: 22px;">
                       
                            <td>
                                <%#Eval("Name") %>
                            </td>
                            <td>
                                <%#Eval("DisplayName") %>
                            </td>
                            
                            <td>
                                <%#Eval("Url")%>
                            </td>
                            <td align="center">
                                <asp:Image ID="img" Height="22px" Width="80px" CssClass="CatalogImg" runat="server" ImageUrl='<%#String.Format("../{0}",Eval("ImageUrl"))%>'
                                    Visible='<%#GetVisible(Eval("ImageUrl")) %>'></asp:Image>
                            </td>
                            <td  align="center"><%#Eval("OrderId")%>
                            </td>
                            <td align="center">
                                 <a href="CatalogAddEdit.aspx?NodeCode=<%#Eval("NodeCode") %>"><img alt="添加" src="images/Action/add.gif" style="border:0px" /></a>
                            </td>
                            <td align="center">
                                 <a href="CatalogMove.aspx?ID=<%#Eval("ID") %>"><img alt="移动" src="images/Action/move.gif" style="border:0px" /></a>
                            </td>
                            <td  align="center"><a href="CatalogAddEdit.aspx?ID=<%#Eval("ID") %>"><img alt="编辑" src="images/Action/edit.gif" style="border:0px" /></a>
                            </td>
                            <td  align="center"> 
                            <asp:LinkButton ID="lbtnDel" OnClientClick="return confirm('确定要删除该记录吗？');" CommandName="Delete" CommandArgument='<%#Eval("Id")%>' runat="server"><img alt="删除" src="images/Action/delete.gif" style="border:0px" /></asp:LinkButton>
                            </td>
                        </tr>
                    </AlternatingItemTemplate>
                    <FooterTemplate>
                        </TBODY> </TABLE>
                    </FooterTemplate>
                </asp:Repeater>
                
            </div>
        </div><div id="large" style="position: absolute"></div>
    </form>
</body>
</html>

在上面的代码中有两个重要的步骤：1、对数据进行再排序，使其符合显示格式要求。2、生成JQTreeTable所要的参数

三、来看一下，运行后的重要页面代码部分

<script type="text/javascript">
$(function(){
    //[]中是通过后台代码生成的参数
    var map = [0,1,2,2,2,2,2,1,8,8,8,8,8,8,8,8,16,16,8,8,8,8,8,8,24,25,25,24,28,28,8,8,1,33,33,33,1,37,38,37,37,1,42,42,1,45,45,45,1,49,49,49,49,49,1];
    var options = {openImg: "images/TreeTable/tv-collapsable.gif", shutImg: "images/TreeTable/tv-expandable.gif", leafImg: "images/TreeTable/tv-item.gif", lastOpenImg: "images/TreeTable/tv-collapsable-last.gif", lastShutImg: "images/TreeTable/tv-expandable-last.gif", lastLeafImg: "images/TreeTable/tv-item-last.gif", vertLineImg: "images/TreeTable/vertline.gif", blankImg: "images/TreeTable/blank.gif", collapse: false, column: 0, striped: false, highlight: true, onselect: function(target){}}; 
   if(map!=null&&map.length>0)
    {
      $("#treetable").jqTreeTable(map, options);
    }
});
</script>

四、对上述的脚本进一步解释：

 var map = [0,1,2,2,2,2,2,1,8,8,8,8,8,8,8,8,16,16,8,8,8,8,8,8,24,25,25,24,28,28,8,8,1,33,33,33,1,37,38,37,37,1,42,42,1,45,45,45,1,49,49,49,49,49,1];

这段代码是对要生成的JQTreeTable中行的上下级关系的声明。通过参数map，生成我们要的树形结构。如在刚开始的效果图中，第一行“首页”是

一个根节点，那么第一个数字就是0（行）。第二行“大榭概况”是第一行“首页”的子节点，那么第二个数就是1（行）。依次类推。

var options = {openImg: "images/TreeTable/tv-collapsable.gif", shutImg: "images/TreeTable/tv-expandable.gif", leafImg: "images/TreeTable/tv-item.gif", lastOpenImg: "images/TreeTable/tv-collapsable-last.gif", lastShutImg: "images/TreeTable/tv-expandable-last.gif", lastLeafImg: "images/TreeTable/tv-item-last.gif", vertLineImg: "images/TreeTable/vertline.gif", blankImg: "images/TreeTable/blank.gif", collapse: false, column: 0, striped: false, highlight: true, onselect: function(target){}};

这段代码是对要生成的JQTreeTable的参数的声明。

openImg、shutImg、leafImg、lastOpenImg、lastShutImg、lastLeafImg、vertLineImg、blankImg：是对树形效果的图片参数设置。

collapse：是否节点收缩起来。

column：要生成树形结构显示的是第几列，第一列为0。

striped:奇偶行颜色间隔 。

highlight：鼠标所在行高亮显示。

onselect：单击选中时触发的事件。

五：资源下载：

JQTreeTable:http://www.hanpau.com/jquery/unobtrusivetreetable.php