WPF ComboBox與實體框架orderBy

Question

我像這樣在我的項目中填充了ComboBox

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

我使用實體框架和c＃，如何按升序排序結果？

仍然不能（我正在嘗試很多）我附上完整的代碼

           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

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 2

另一種選擇是使用帶有SortDescription的CollectionViewSource ：

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

Answer 3

在@Ross的帖子之后，您還可以通過以下方式獲取CollectionViewSource ：

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