标准树的代码
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1: class Tree
2: {
3: static Data.test.ICategoriesRepository iCategoriesRepository = new Data.test.CategoriesRepository();
4: /// <summary>
5: /// 树形数据对象列表
6: /// </summary>
7: static List<Entity.test.Category> list = null;
8: /// <summary>
9: /// 获取当前树形数据对象列表
10: /// </summary>
11: internal static List<Entity.test.Category> ProductVirtualCategoryList
12: {
13: get { return list; }
14: }
15: static Tree()
16: {
17: Reload();
18: }
19: /// <summary>
20: /// 重新加载分类树型列表
21: /// </summary>
22: internal static void Reload()
23: {
24: list = iCategoriesRepository.GetCategories().ToList();
25: }
26: /// <summary>
27: /// 根据父对象，找到子孙树，通过递归所到所有子对象，并把对象赋给参数father
28: /// </summary>
29: /// <param name="father">父对象</param>
30: static internal void GetSublCategories(Entity.test.Category father)
31: {
32: father.SubCategoryies = list.Where(item => item.ParentId.Equals(father.Id)).ToList();
33: father.SubCategoryies.ForEach(item => {item.FatherCategory = father;
34: GetSublCategories(item);
35: });
36: }
37: }
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树的组装，与前台HTML的拼接
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1: #region 树的遍历（递归思想）
2: Entity.test.Category list = new Entity.test.Category { Id = 1 };
3: Tree.GetSublCategories(list);//为list填充子树
4: StringBuilder html = new StringBuilder();
5: html.Append("<ul>");
6: GetSubCategory(html, list);
7: html.Append("</ul>");
8: #endregion
9: Console.WriteLine(html);
树的显示时用到的递归方法
1: /// <summary>
2: /// 通过递归拼树形结构
3: /// </summary>
4: /// <param name="html"></param>
5: /// <param name="category"></param>
6: private static void GetSubCategory(StringBuilder html, Entity.test.Category category)
7: {
8: html.Append("<li>");
9: html.Append("<input type='hidden' value='" + category.Id + "' />");
10: html.Append("<a href='#' name='" + category.Name + "'>");
11: html.Append("<ins> </ins>");
12: html.Append(category.Id + "-" + category.Name + "(" + category.Level + ")");
13: html.Append("</a>");
14: if (category.SubCategoryies != null && category.SubCategoryies.Count > 0)
15: {
16: html.Append("<ul>");
17: foreach (var item in category.SubCategoryies)
18: {
19: GetSubCategory(html, item);
20: }
21: html.Append("</ul>");
22: }
23: html.Append("</li>");
24: }
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本文转自博客园张占岭（仓储大叔）的博客，原文链接：数据结构~在页面上渲染树型结构，如需转载请自行联系原博主。
