List递归获取所有上级和下级:
- 开发笔记
- 2024/1/25 16:59:31
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简介
List递归获取所有上级和下级: #region 获取所有下级:非接口 private static IEnumerable<Album_ProductTagTreeDto> GetSons(IList<Album_ProductTagTreeDto> list, long Fid) { var query = list.Where(p => p.ID == Fid).ToList(); var list2 = query.Concat(GetSonList(list, Fid)); return list2; } private static IEnumerable<Album_ProductTagTreeDto> GetSonList(IList<Album_ProductTagTreeDto> list, long Fid) { var query = list.Where(p => p.ParentID == Fid).ToList(); return query.ToList().Concat(query.ToList().SelectMany(t => GetSonList(list, t.ID))); } #endregion #region 获取所有上级:非接口 private static IEnumerable<Album_ProductTagTreeDto> GetFatherList(IList<Album_ProductTagTreeDto> list, long Id) { var query = list.Where(p => p.ID == Id).ToList(); return query.ToList().Concat(query.ToList().SelectMany(t => GetFatherList(list, t.ParentID))); } #endregion
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