.NET easyUI tree树状结构

简单的制作后台制作写一个json（string类型）格式

public partial class goodstype_type : System.Web.UI.Page
{
    public string datalist = "",tree="";
    goodstypeManage bll = new goodstypeManage();
    goodstype model = new goodstype();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            datalist = getlist();
           // tree = gettree("0");
        }
    }
    protected string getlist()
    {
        string s = "";

        DataTable data = bll.GetAllList();
        foreach (DataRow row in data.Rows)
        {
            s += "{\"id\":" + row["id"].ToString() + ",\"parentId\":" + row["parentid"].ToString() + ",\"name\": \"" + row["name"].ToString() + "\"},";
        }
        if (s != "")
        {
            s = s.Substring(0, s.Length -1);
        }
        return s;
    }

在前台取来的的数据处理easyUI tree结构使用的样式

 <script type="text/javascript">
       function convert(rows) {
           function exists(rows, parentId) {
               for (var i = 0; i < rows.length; i++) {
                   if (rows[i].id == parentId) return true;
               }
               return false;
           }

           var nodes = [];
           // get the top level nodes
           for (var i = 0; i < rows.length; i++) {
               var row = rows[i];
               if (!exists(rows, row.parentId)) {
                   nodes.push({
                       id: row.id,
                       text: row.name
                   });
               }
           }

           var toDo = [];
           for (var i = 0; i < nodes.length; i++) {
               toDo.push(nodes[i]);
           }
           while (toDo.length) {
               var node = toDo.shift(); // the parent node
               // get the children nodes
               for (var i = 0; i < rows.length; i++) {
                   var row = rows[i];
                   if (row.parentId == node.id) {
                       var child = { id: row.id, text: row.name };
                       if (node.children) {
                           node.children.push(child);
                       } else {
                           node.children = [child];
                       }
                       toDo.push(child);
                   }
               }
           }
           return nodes;
       }

       $(function () {
           $(‘#tt‘).tree({
              data: [<%=datalist %>],
               loadFilter: function (rows) {
                   return convert(rows);
               }
           });
           gettypetree();
           //$(‘#tree‘).combotree({
           // onSelect: function (node)
           // {

           // }
        //  });
       });
    </script>

    <div style="float: left; width: 40%">
        <ul id="tt">
        </ul>
    </div>

第二种是用递归方式 取出来的 转换json格式 tree 直接使用

链接网址：https://www.cnblogs.com/yonex/p/3379362.html

Java  这个网页也是用的递归方式  链接：https://www.cnblogs.com/20gg-com/p/6206502.html