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C# 按降序排列的OrderBy可观察集合-UWP_C#_Sorting_Uwp_Observablecollection - Fatal编程技术网
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C# 按降序排列的OrderBy可观察集合-UWP

c# sorting uwp

C# 按降序排列的OrderBy可观察集合-UWP,c#,sorting,uwp,observablecollection,C#,Sorting,Uwp,Observablecollection,我可以使用下面的代码通过我的可观察集合进行订购。我怎样才能按降序排序呢 RollNoArray _mainItems = new RollNoArray(); _mainItems.SubItemsList = new ObservableCollection<SubItems>(); //..adding data to _mainItems.SubItemsList here _mainItems.SubItemsList = new ObservableCol

我可以使用下面的代码通过我的可观察集合进行订购。我怎样才能按降序排序呢

  RollNoArray _mainItems = new  RollNoArray();
  _mainItems.SubItemsList = new ObservableCollection<SubItems>();
  //..adding data to _mainItems.SubItemsList here
  _mainItems.SubItemsList = new ObservableCollection<SubItems>
 (from i in _mainItems.SubItemsList orderby i.num select i);// order by num

rollnarray\u main items=new rollnarray（）；
_mainItems.SubItemsList=新的ObservableCollection（）；
//…将数据添加到此处列出的_mainItems.subitems
_mainItems.SubItemsList=新的ObservableCollection

（从_mainItems.SubItemsList orderby i.num选择i中的i）；//按数字排序
使用LinqOrderByDescending代替OrderBy：

_mainItems.SubItemsList.OrderByDescending(i => i.num).ToList();
从i in _mainItems.subitems按i.num排序
降序
选择i