[开发工具]C#匿名委托递归，部门树形

 /// <summary>
 /// 获取AUAP数据库部门树形
  /// </summary>
  /// <returns></returns>
  /// 创建时间：2022-3-14 09:26:29； 
  public async Task<List<DepartView2>> GetDepartmentTreeAsync()
  {

      //数据库数据
      var departmentViews = await auap_Field_CommentDAL.GetDepartmentViewsAllAsync();


      //读取子集
      foreach (var item in departmentViews)
      {
          item.child = departmentViews.Where(x => x.ParentId == item.DepartId).ToList();
          item.IsHaveChild = item.child.Count > 0 ? 1 : 0;
      }

      //返回数据
      List<DepartView2> tree = new List<DepartView2>();

      //根节点
      int rootId = 0;
      //int.TryParse(MyConfigReader.GetConfigValue("root_dept_id"),out rootId);

      var list_01 = departmentViews.Where(x => x.DepartId == rootId).ToList();

      //查找子集
      Action<DepartView2> func = null;
      func = (q) =>
      {
          var find = departmentViews.FirstOrDefault(x => x.DepartId == q.id);
          if (find.child.Count() > 0)
          {
              List<DepartView2> childList = new List<DepartView2>();
              foreach (var item in find.child)
              {
//DepartView2前端数据格式 模型
                  DepartView2 departView3 = new DepartView2();
                  departView3.id = item.DepartId;
                  departView3.title = item.DepartName;
                  childList.Add(departView3);
                  func(departView3);
              }
              q.children = childList;
          }
      };

      foreach (var item in list_01)
      {
          DepartView2 departView3 = new DepartView2();
          departView3.id = item.DepartId;
          departView3.title = item.DepartName;
          func(departView3);
          tree.Add(departView3);
      }
      return tree;
  }

 /// <summary>
 /// 前端框架，部门树形数据格式
 /// </summary>
 public class DepartView2
 {
     public int id { get; set; }
     public string title { get; set; }
     public List<DepartView2> children { get; set; }
 }

   /// <summary>
    /// 部门树形
    /// </summary>
    public class DepartmentView
    {
        /// <summary>
        /// 部门id
        /// </summary>
        public int DepartId { get; set; }

        /// <summary>
        /// 部门名称
        /// </summary>
        public string DepartName { get; set; }

        /// <summary>
        /// 父级id
        /// </summary>
        public int? ParentId { get; set; }

        /// <summary>
        /// 子集
        /// </summary>
        public List<DepartmentView> child { get; set; } = new List<DepartmentView>();

        /// <summary>
        /// 是否有子集，1=有，0=没有
        /// </summary>
        public int IsHaveChild { get; set; }

        /// <summary>
        /// 层级
        /// </summary>
        public int Level { get; set; }

    }

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