1: class Tree  

  2:         {       

  3:             static Data.test.ICategoriesRepository iCategoriesRepository = new Data.test.CategoriesRepository(); 

  4:             /// <summary>

  5:             /// 樹形數據(ju)對(dui)象(xiang)列表   

  6:             /// </summary>

  7:              static List<Entity.test.Category> list = null;       

  8:            /// <summary>    

  9:            /// 獲取當(dang)前樹形數據對(dui)象列表(biao)   

 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(zhong)新加載(zai)分類樹(shu)型(xing)列表     

 21:             /// </summary>

 22:            internal static void Reload()  

 23:            {

 24:                list = iCategoriesRepository.GetCategories().ToList();   

 25:            }    

 26:             /// <summary>    

 27:             ///  根據父對象，找到子孫樹，通(tong)過遞歸所(suo)到所(suo)有子對象，并(bing)把對象賦給參數(shu)father   

 28:             ///  </summary>   

 29:             ///  <param name="father">父對象</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:         }

  1:    #region 樹的遍歷（遞歸思想）  

  2:     Entity.test.Category list = new Entity.test.Category { Id = 1 };   

  3:     Tree.GetSublCategories(list);//為list填充子樹        

  4:     StringBuilder html = new StringBuilder();  

  5:     html.Append("<ul>");  

  6:     GetSubCategory(html, list); 

  7:     html.Append("</ul>");    

  8:     #endregion    

  9:     Console.WriteLine(html);

樹(shu)的顯示時(shi)用到(dao)的遞(di)歸方法

 

  1: /// <summary>

  2: /// 通(tong)過遞歸拼樹(shu)形結構

  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>&nbsp;</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:   }