.net生成zTree標准形式的json數據源

數據庫字段

id     name     parent_id

1      水果      0

2      蘋果      1

3      香蕉      1

如果是根節點此處使用0代替根節點的父節點。

生成方式一

 /// <summary>
       /// 生成zTree標准json數據源
       /// </summary>
       /// <param name="parent_id">父節點</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);//封裝的查詢數據庫方法

           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("\",");
                   //在此處添加其他DIY屬性，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

 對象類

/// <summary>
    /// 用來生成zTree需要的json格式，類屬性與ztree配置節點對應
    /// </summary>
    public class zTree
    {
        public string id { get; set; }
        /// <summary>
        /// 父節點id
        /// </summary>
        public string pId { get; set; }
        public string name { get; set; }
        public bool isParent { get; set; }
        /// <summary>
        /// 是否展開
        /// </summary>
        public bool open { get; set; }
        /// <summary>
        /// 子節點列表
        /// </summary>
        public List<zTree> children { get; set; }
    }

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

生成json

/// <summary>
    /// 獲取json字符
    /// </summary>
    public class GetZTreeJson 
    {
        /// <summary>
        /// 獲取json字符
        /// </summary>
        public string josn()
        {
            List<fruit> listAll = null;//查詢全部數據，查詢省略，封裝到list

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

            return Newtonsoft.Json.JsonConvert.SerializeObject(listZtree);
        }
        /// <summary>
        /// 封裝成ztree類
        /// </summary>
        /// <param name="listAll">全部數據list</param>
        /// <param name="parentid">根節點的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查詢，必須重復查詢數據庫，數據量小時適用
            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;
        }
    }