如何动态更新数据网格中组合框列的选择？

Question

我正在尝试将数据表（dt）中的两列显示到数据网格中。并添加另一列，它是一个组合列，以便我可以为每行分配扇区。问题是组合框的选择无法动态更新。当我单击其他内容时，选择消失了。有什么办法可以解决这个问题吗？

   dg_display.DataContext = dt.DefaultView;
   dg_display.Columns[0].Header = "Symbol";
   dg_display.Columns[1].Header = "Company name";          
   DataGridComboBoxColumn columnComboBox = new DataGridComboBoxColumn();
   string[] sectorarray = new[]
                                    {
                                       "Consumer Discretionary", "Consumer     Staples", "Energy", "Financial",
                                       "Financials", "Health Care", "Industrials", "Information Technology",
                                       "Materials", "Other", "Technology","Telecommunication Services", "Utilities"
                                   };
        columnComboBox.ItemsSource = sectorarray;
        columnComboBox.IsReadOnly = false;
                    dg_display.Columns.Add(columnComboBox);
        dg_display.Columns[2].Header = "Sector";

Answer 1

您没有将 ComboBox

Set 中的 SelectedItem 绑定到 SelectedItemBinding 或 SelectedValueBinding

Answer 2

你可以这样尝试......

 DataGridComboBoxColumn col = new DataGridComboBoxColumn();
        col.Header = "Name";
        col.DisplayMemberPath = "Name"; 
        col.SelectedValueBinding = new Binding("Name");
        col.ItemsSource = simacc;
        col.TextBinding = new Binding("Name");
        col.CanUserSort = false;
        dataGrid1.Columns.Add(col);