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78 lines
1.9 KiB
78 lines
1.9 KiB
using System.Collections;
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using System.Collections.Generic;
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namespace Magic.Core;
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/// <summary>
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/// 树基类
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/// </summary>
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public interface ITreeNode
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{
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/// <summary>
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/// 获取节点id
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/// </summary>
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/// <returns></returns>
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long GetId();
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/// <summary>
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/// 获取节点父id
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/// </summary>
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/// <returns></returns>
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long GetPid();
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/// <summary>
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/// 设置Children
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/// </summary>
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/// <param name="children"></param>
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void SetChildren(IList children);
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}
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/// <summary>
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/// 递归工具类，用于遍历有父子关系的节点，例如菜单树，字典树等等
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/// </summary>
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/// <typeparam name="T"></typeparam>
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public class TreeBuildUtil<T> where T : ITreeNode
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{
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/// <summary>
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/// 顶级节点的父节点Id(默认0)
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/// </summary>
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private readonly long _rootParentId = 0L;
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/// <summary>
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/// 构造树节点
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/// </summary>
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/// <param name="nodes"></param>
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/// <returns></returns>
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public List<T> DoTreeBuild(List<T> nodes)
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{
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nodes.ForEach(u => BuildChildNodes(nodes, u, new List<T>()));
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var results = new List<T>();
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nodes.ForEach(u =>
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{
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if (_rootParentId == u.GetPid())
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results.Add(u);
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});
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return results;
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}
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/// <summary>
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/// 构造子节点集合
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/// </summary>
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/// <param name="totalNodes"></param>
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/// <param name="node"></param>
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/// <param name="childNodeLists"></param>
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private void BuildChildNodes(List<T> totalNodes, T node, List<T> childNodeLists)
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{
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var nodeSubLists = new List<T>();
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totalNodes.ForEach(u =>
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{
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if (u.GetPid().Equals(node.GetId()))
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nodeSubLists.Add(u);
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});
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nodeSubLists.ForEach(u => BuildChildNodes(totalNodes, u, new List<T>()));
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childNodeLists.AddRange(nodeSubLists);
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node.SetChildren(childNodeLists);
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}
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}
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