.net生成zTree标准形式的json数据源

数据库字段

id     name     parent_id

1      水果      0

2      苹果      1

3      香蕉      1

如果是根节点此处使用0代替根节点的父节点。

生成方式一

 /// <summary>
       /// 生成zTree标准json数据源
       /// </summary>
       /// <param name="parent_id">父节点</param>
       /// <returns></returns>
       public string GetModuleTreeJson(string parent_id) 
       {
           StringBuilder jsonTree = new StringBuilder();
           if (string.IsNullOrEmpty(parent_id))
           {
               parent_id = "0";
           }
           string where = string.Format(" and parent_id='{0}'", parent_id);
           DataSet ds = DALModul.getModuleList(where);//封装的查询数据库方法

           if (ds.Tables[0].Rows.Count > 0)
           {
               jsonTree.Append("[");
               for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
               {
                   DataRow dr = ds.Tables[0].Rows[i];
                   jsonTree.Append("{\"id\":\"").Append(dr["id"]).Append("\",");
                   jsonTree.Append("\"name\":\"").Append(dr["module"]).Append("\",");
                   //在此处添加其他DIY属性，注意最后的“,”
                   jsonTree.Append("\"product\":\"").Append(dr["product"]).Append("\",");
                   jsonTree.Append("\"children\":").Append(GetModuleTreeJson(dr["id"].ToString()));
                   jsonTree.Append("},");
                   if (i == (ds.Tables[0].Rows.Count - 1))
                   {
                       jsonTree.Remove(jsonTree.Length - 1, 1);
                   }
               }
               jsonTree.Append("]");
           }
           else
           {
               jsonTree.Append("\"\"");
           }

           return jsonTree.ToString();
       }

 生成方式二

 对象类

/// <summary>
    /// 用来生成zTree需要的json格式，类属性与ztree配置节点对应
    /// </summary>
    public class zTree
    {
        public string id { get; set; }
        /// <summary>
        /// 父节点id
        /// </summary>
        public string pId { get; set; }
        public string name { get; set; }
        public bool isParent { get; set; }
        /// <summary>
        /// 是否展开
        /// </summary>
        public bool open { get; set; }
        /// <summary>
        /// 子节点列表
        /// </summary>
        public List<zTree> children { get; set; }
    }

    /// <summary>
    /// 水果类
    /// </summary>
    public class fruit
    {
        public int id { get; set; }
        public string id { get; set; }
        public int parent_id { get; set; }
    }

生成json

/// <summary>
    /// 获取json字符
    /// </summary>
    public class GetZTreeJson 
    {
        /// <summary>
        /// 获取json字符
        /// </summary>
        public string josn()
        {
            List<fruit> listAll = null;//查询全部数据，查询省略，封装到list

            List<zTree> listZtree = GetJsonTreefruit(listAll, 0);

            return Newtonsoft.Json.JsonConvert.SerializeObject(listZtree);
        }
        /// <summary>
        /// 封装成ztree类
        /// </summary>
        /// <param name="listAll">全部数据list</param>
        /// <param name="parentid">根节点的id</param>
        /// <returns></returns>
        public List<zTree> GetJsonTreefruit(List<fruit> listAll, int parentid)
        {
            List<zTree> listTree = new List<zTree>();

            IEnumerable<fruit> list = listAll.Where(p => p.parent_id == parentid);//使用linq查询，必须重复查询数据库，数据量小时适用
            if (list.Count() > 0)
            {
                zTree ztree = null;

                foreach (fruit item in list)
                {
                    ztree = new zTree();
                    ztree.id = item.id.ToString();
                    ztree.pId = item.parent_id.ToString();
                    ztree.name = item.name;
                    List<zTree> listChildren = GetJsonTreefruit(listAll, item.id);
                    if (listChildren.Count > 0)
                    {
                        ztree.isParent = true;
                        ztree.children = listChildren;
                    }
                    else
                    {
                        ztree.isParent = false;
                        ztree.children = null;
                    }

                    listTree.Add(ztree);
                }
            }

            return listTree;
        }
    }