/// <summary> /// 通用递归获取树状子节点信息 /// </summary> /// <param name="item"></param> /// <param name="id"></param> /// <returns></returns> private List<T> getTreeListByPid<T, F>(List<F> item, long pid, F d) where T : BaseTreeDto<T>, new() where F : BaseTreeDic, new() { List<T> ItemsDto = new List<T>(); //限制条件跳出 if (item.Where(s => s.Pid == pid).Count() > 0) { item.Where(s => s.Pid == pid).ToList().ForEach(f => { ItemsDto.Add(new T { Id = f.Id, Name = f.Name, Item = getTreeListByPid<T, F>(item, f.Id, f) }); }); } return ItemsDto; }
public class BaseTreeDto<T> { public long Id { get; set; } public string Name { get; set; } public List<T> Item { get; set; } } public class BaseTreeDic { public long Id { get; set; } public string Name { get; set; } public string Code { get; set; } public long Pid { get; set; } }
调用方式 将头节点筛选出来然后传参进入方法即可（以下是伪代码）
List<T> list = new List<T>(); List<F> item = GetListF(); List<F> tempAllitem = item.Where(i => i.Pid == 0).ToList(); tempAllitem.ForEach(i => { list.Add(new T{ Id = i.Id, Name = i.Name, Item = getTreeListByPid<T, F>(item, i.Id, i) }); });
原文：https://www.cnblogs.com/zzlblog/p/10014907.html