C# WPF - 在 DataView 中添加新项目后显示在 ListBox 中排序的项目

Question

添加新项目时如何对DataView进行排序？我有包含 ListBox 控件的 UserControl，其中 ItemsSource 设置为 DataView。当我将新项目添加到 DataView 时，项目始终显示在列表框中的最后一个。对 DataView 进行排序并在 ListBox 中显示新项目的最佳方式是什么？

DataView ListBoxItems = new DataView();

private void UserControl_Loaded(object sender, RoutedEventArgs e)
{
    DataTable dt = ..."SELECT * FROM table" //populated from database

    ListBoxItems = dt.DefaultView;

    ListBoxItems.Sort = "Col1 DESC, Col2 ASC";

    ListBox.ItemsSource = ListBoxItems;
}

//Adding new item into DataView
DataRowView row = ListBoxItems.AddNew();
row["Col1"] = value1;
row["Col2"] = value2;
ListBoxItems.EndInit();                   
ListBox.SelectedItem = row;
ListBox.ScrollIntoView(row);

编辑：我尝试了 Max Play 提供的 link 的解决方案，但没有成功。添加新项目的更新代码：

//Adding new item into DataView
DataRowView row = ListBoxItems.AddNew();
row["Col1"] = value1;
row["Col2"] = value2;
ListBoxItems.EndInit();

ListBox.Items.SortDescriptions.Clear();
ListBox.Items.SortDescriptions.Add(new System.ComponentModel.SortDescription("Col1", System.ComponentModel.ListSortDirection.Descending));
ListBox.Items.SortDescriptions.Add(new System.ComponentModel.SortDescription("Col2", System.ComponentModel.ListSortDirection.Ascending));
                   
ListBox.SelectedItem = row;
ListBox.ScrollIntoView(row);

新项目总是在 ListBox 中最后显示而不是最先显示（基于排序选项）。

Answer 1

已找到解决方案，现在按预期运行。

DataView ListBoxItems = new DataView();

private void UserControl_Loaded(object sender, RoutedEventArgs e)
{
    DataTable dt = ..."SELECT * FROM table" //populated from database

    ListBoxItems = dt.DefaultView;

    ListBoxItems.Sort = "Col1 DESC, Col2 ASC";

    ListBox.ItemsSource = ListBoxItems;
}

//Adding new item
BindingListCollectionView cv = (BindingListCollectionView)CollectionViewSource.GetDefaultView(ListBox.ItemsSource);
DataRowView row = (DataRowView) cv.AddNew();
row["Col1"] = value1;
row["Col2"] = value2;
cv.CommitNew();              
cv.SortDescriptions.Clear();
cv.SortDescriptions.Add(new SortDescription("Col1", ListSortDirection.Descending));
cv.SortDescriptions.Add(new SortDescription("Col2", ListSortDirection.Ascending));                 
ListBox.SelectedItem = row;
ListBox.ScrollIntoView(row);

C# WPF - 在 DataView 中添加新项目后显示在 ListBox 中排序的项目

C# WPF - Show items sorted in ListBox after adding new item in DataView

c#

wpf

dataview