c# - 带有实体框架 orderBy 的 WPF ComboBox

Question

我像这样在我的项目中填充了组合框

            CB_City.ItemsSource = c.Cities;
            CB_City.DisplayMemberPath = "city1";
            CB_City.SelectedValuePath = "city_id";
            CB_City.SelectedValue = 517;

我使用实体框架和 c# ，如何按升序对结果进行排序？

仍然不能（我尝试了很多）我附上了完整的代码

           using (MorEntities1  c = new MorEntities1())
        {
            CB_City.ItemsSource = c.Cities;
            CB_City.DisplayMemberPath = "city1";
            CB_City.SelectedValuePath = "city_id";
            CB_City.SelectedValue = 517;
        } 

Answer 1

除了@Ross 的帖子，您还可以通过CollectionViewSource以下方式获得：

var view = CollectionViewSource.GetDefaultView(CB_City.ItemsSource);
view.SortDescriptions.Add(new SortDescription("city1", 
    ListSortDirection.Ascending));

Answer 2

您可以使用：CB_City.ItemsSource = c.Cities.OrderBy(c=>c.Text)或CB_City.ItemsSource = c.Cities.OrderBy(c=>c.Text)

Answer 3

另一种选择是将 aCollectionViewSource与 a 一起使用SortDescription：

var myViewSource = new CollectionViewSource { Source = c.Cities.ToList() };
myViewSource.SortDescriptions.Add(
  new SortDescription("YOUR_PROPERTY", ListSortDirection.Ascending)
);
CB_City.ItemsSource = myViewSource.View;