效果图:
后端代码,此处以C#编写的后台,Java或其他语言同理
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.Mvc;
namespace Web.Controllers
{
public class TreeDataController : BaseController
{
BLL.TreeData bll = new BLL.TreeData();
#region 以树形式展示图纸目录
/// <summary>
/// 视图
/// </summary>
/// <returns></returns>
public ActionResult DrawingTree()
{
if (CurrentUser == null)//验证用户是否登录
return new HttpUnauthorizedResult();
return View();
}
#endregion
/// <summary>
/// 文件树视图,页面初始化获取树数据,以json形式返回
/// </summary>
/// <returns></returns>
public ActionResult GetTreeData()
{
List<FileNode> listTree = InitTree();
return Json(listTree, JsonRequestBehavior.AllowGet);
}
/// <summary>
/// 初始化加载树
/// </summary>
/// <returns></returns>
private List<FileNode> InitTree()
{
List<FileNode> listNodes = new List<FileNode>();
var newTree = bll.QueryList(); //数据库查找数据源,此处也可以定义虚拟数据
#region 首次加载检测不到数据时默认插入项目节点
if (newTree.Count == 0)
{
bll.Add(new Model.TreeData()
{
BgColor = "#eee";//节点背景颜色
FgColor="#eee";//节点字体颜色
Level = 0,
Order = 0,
TreeName = "项目名称",
TreeCode = "节点编码",
ParentId = 0,
UpdateTime = DateTime.Now,
FilePath=null
});
}
#endregion
#region 一次性存储数据源,后面后面递归子集时多次使用
List<FileNode> nodeList = new List<FileNode>();
foreach (var item in newTree)
{
FileNode node2 = new FileNode();
node2.id = item.Id;//要显示的id,此id一般为表的主键,具有唯一性
node2.topic = item.TreeName;//要显示的名称
node2.direction = "right";//思维导图伸向,目前只支持left/right
node2.parentId = item.ParentId;
node2.expanded = true;//该节点是否展开
nodeList.Add(node2);
}
#endregion
#region 装载数据源,此数据结果返回的是最终的所有结点树集合
List<FileNode> rootNode = new List<FileNode>();
foreach (var plist in newTree.Where(t => t.ParentId== 0))
{
FileNode node = new FileNode();
node.id = plist.Id;
node.topic = plist.Code;
node.direction = plist.Note;//思维导图伸向,目前只支持left/right
node.parentId = plist.ParentId;
node.background = "#eee";//节点背景颜色
node.foreground = "blue";//节点字体颜色
node.expanded = true;
node.children = CreateChildTree(nodeList, node);
rootNode.Add(node);
}
return rootNode;
#endregion
}
/// <summary>
/// 获取子集树
/// </summary>
/// <param name="TreeList"></param>
/// <param name="jt"></param>
/// <returns></returns>
private List<FileNode> CreateChildTree(List<FileNode> TreeList, FileNode filenode)
{
List<FileNode> nodeList = new List<FileNode>();
var children = TreeList.Where(t => t.parentId == filenode.Id);
foreach (var chl in children)
{
FileNode node = new FileNode();
node.id = chl.Id;
node.topic = chl.topic;
node.direction = chl.direction;//思维导图伸向,目前只支持left/right
node.parentId = chl.parentId;
node.background = chl.background;//节点背景颜色
node.foreground = chl.foreground;//节点字体颜色
node.expanded = true;
node.children = CreateChildTree(TreeList, node);
nodeList.Add(node);
}
return nodeList;
}
/// <summary>
/// 根据选择的节点ID和方向参数,获取同级的上一个节点ID或下一个节点ID
/// </summary>
/// <returns>上一个或下一个节点排序号</returns>
[HttpPost]
public JsonResult GetMoveOrder()
{
var id = GetQueryString("id");
var parentId = GetQueryInt("parent", 0);
var direction = GetQueryString("direction");
var model = bll.GetModel(Convert.ToInt32(id));
int upId = -1;
int targetId = -1;//最终返回的相邻的上/下的节点ID
if (direction == "up") //向上移动
{
upId = Convert.ToInt32(mo