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在MVC的Razor视图展示无级分类的办法，在网上看了很多资料，大多搞得很高大上。可能本人水平有限，实在是不会用。
那我就用最简单爆力的办法来做。
Model：
public class NewsCategory { [Key] public int CategoryId { get; set; } public int ParentCategoryId { get; set; } [Required] [StringLength(50)] public string CategoryName { get; set; } }
ViewModel
public class NewsCategoriesViewModel { public int Id { get; set; } public string Name { get; set; } public List<NewsCategoriesViewModel> children { get; set; } }
Controller
递归获取数据，然后返回给视图
1 abcContext db = newabcContext(); 2 public ActionResult Index() 3 { 4 var categoryList = GetCategoryList(0); 5 return View(categoryList); 6 } 7 8 [NonAction] 9 public List<NewsCategoriesViewModel> GetCategoryList(int Id) 10 { 11 List<NewsCategoriesViewModel> uvModel = new List<NewsCategoriesViewModel>(); 12 13 14 var perentList = db.Set<NewsCategory>().Where(p => p.ParentCategoryId == Id).ToList(); 15 16 if (perentList.Count > 0) 17 { 18 foreach (var item in perentList) 19 { 20 NewsCategoriesViewModel userViewModel = new NewsCategoriesViewModel 21 { 22 Id = item.CategoryId, 23 Name = item.CategoryName, 24 children = new List<NewsCategoriesViewModel>() 25 }; 26 List<NewsCategoriesViewModel> tempList = GetCategoryList(item.CategoryId); 27 if (tempList.Count > 0) 28 { 29 //这里出错了; 30 //userViewModel.children.Add(tempList); 31 userViewModel.children = tempList; 32 } 33 uvModel.Add(userViewModel); 34 } 35 } 36 return uvModel; 37 } 38 }
View
定义一个视图方法，然后递归调用。
@model List<NewsCategoriesViewModel> @helper DisplayList(List<NewsCategoriesViewModel> model) { if (model.Count > 0) { <ul> @foreach (var item in model) { <li>@item.Name</li> if (item.children.Count > 0) { @DisplayList(item.children); } } </ul> } } @DisplayList(Model)
打完收功！
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原文地址：http://www.cnblogs.com/micenote/p/5032497.html
