C#通用递归生成树形结构数据

        /// <summary>
        /// 构建树形结构类
        /// </summary>
        public class TreeModel
        {
            public string ID { set; get; }
            public string PARENTID { set; get; }
            public string NAME { set; get; }
            public List<TreeModel> TREECHILDREN { set; get; }
        }

　　　　  /// <summary>
        /// 公用递归(反射转换List)
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="allList">数据列表</param>
        /// <param name="parentId">父级ID</param>
        /// <param name="idField">id字段名称</param>
        /// <param name="parentIdField">父级id字段名称</param>
        /// <param name="nameField">name字段名称</param>
        /// <returns></returns>
        public List<TreeModel> ConversionList<T>(List<T> allList, string parentId, string idField, string parentIdField, string nameField)
        {
            List<TreeModel> list = new List<TreeModel>();
            TreeModel model = null;
            foreach (var item in allList)
            {
                model = new TreeModel();
                foreach (System.Reflection.PropertyInfo p in item.GetType().GetProperties())
                {
                    if (p.Name == idField)
                    {
                        model.ID = p.GetValue(item).ToString();
                    }
                    if (p.Name == parentIdField)
                    {
                        model.PARENTID = p.GetValue(item).ToString();
                    }
                    if (p.Name == nameField)
                    {
                        model.NAME = p.GetValue(item).ToString();
                    }
                }
                list.Add(model);
            }
            return OperationParentData(list, parentId);
        }

　　　　　/// <summary>
        /// 公用递归(处理递归最父级数据)
        /// </summary>
        /// <param name="treeDataList">树形列表数据</param>
        /// <param name="parentId">父级Id</param>
        /// <returns></returns>
        public List<TreeModel> OperationParentData(List<TreeModel> treeDataList, string parentId)
        {
            var data = treeDataList.Where(x => x.PARENTID == parentId);
            List<TreeModel> list = new List<TreeModel>();
            foreach (var item in data)
            {
                OperationChildData(treeDataList, item);
                list.Add(item);
            }
            return list;
        }
        /// <summary>
        /// 公用递归(递归子级数据)
        /// </summary>
        /// <param name="treeDataList">树形列表数据</param>
        /// <param name="parentItem">父级model</param>
        public void OperationChildData(List<TreeModel> treeDataList, TreeModel parentItem)
        {
            var subItems = treeDataList.Where(ee => ee.PARENTID == parentItem.ID).ToList();
            if (subItems.Count != 0)
            {
                parentItem.TREECHILDREN = new List<TreeModel>();
                parentItem.TREECHILDREN.AddRange(subItems);
                foreach (var subItem in subItems)
                {
                    OperationChildData(treeDataList, subItem);
                }
            }
        }

List<TreeModel> treeViewModels = new List<TreeModel>();
//list为待处理数据集，pID为父级节点ID；然后分别传入待处理数据集中ID的字段名称，父级ID的字段名称和需要展示Name字段名称
treeViewModels = ConversionList(list, pID, "ID", "PID", "EFName");

[{
        "ID": "00000000-0000-0000-0000-000000000001",
        "PARENTID": "00000000-0000-0000-0000-000000000000",
        "NAME": "1级",
        "TREECHILDREN": [{
            "ID": "00000000-0000-0000-0000-000000000002",
            "PARENTID": "00000000-0000-0000-0000-000000000001",
            "NAME": "2级",
            "TREECHILDREN": [{
                "ID": "00000000-0000-0000-0000-000000000003",
                "PARENTID": "00000000-0000-0000-0000-000000000002",
                "NAME": "3级",
                "TREECHILDREN": [{
                    "ID": "00000000-0000-0000-0000-000000000005",
                    "PARENTID": "00000000-0000-0000-0000-000000000003",
                    "NAME": "4级",
                    "TREECHILDREN": null
                }]
            }]
        }]
    },
    {
        "ID": "00000000-0000-0000-0000-000000000004",
        "PARENTID": "00000000-0000-0000-0000-000000000000",
        "NAME": "1级",
        "TREECHILDREN": null
    }
]