WPF Datagrid Combox可編輯

Question

我的目標是將一個可編輯的ComboBox放入DataGrid ，為此我將TextBlock放入CellTemplate並將ComboBox放入CellEditingTemplate 。 但是，如何將我的TextBlock與ComboBox中所選項目的文本綁定？

        var textBlockFactory = new FrameworkElementFactory(typeof(TextBlock));
        textBlockFactory.SetBinding(TextBlock.TextProperty, new Binding("Description"));
        dgc.ClipboardContentBinding = new Binding("Description");

        var template = new DataTemplate();
        template.VisualTree = textBlockFactory;
        dgc.CellTemplate = template;


        var comboBoxFactory = new FrameworkElementFactory(typeof(ComboBox));
        template = new DataTemplate();
        template.VisualTree = comboBoxFactory;

        Binding b = new Binding();
        b.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(UserControl), 1);
        b.Path = new PropertyPath(BindingList);
        comboBoxFactory.SetBinding(ComboBox.ItemsSourceProperty, b);
        comboBoxFactory.SetValue(ComboBox.IsEditableProperty, true);
        comboBoxFactory.SetValue(ComboBox.SelectedValueProperty, new Binding("Type"));
        comboBoxFactory.SetValue(ComboBox.SelectedValuePathProperty, "Id");
        comboBoxFactory.SetValue(ComboBox.DisplayMemberPathProperty, "Description");

        dgc.CellEditingTemplate = template;
        dgc.SortMemberPath = BindingCurrentItem;

Answer 1

在這種特定情況下，您將必須在支持DataGridItem的模型中再增加一個屬性，例如SelectedBinding。 屬性的類型應該是BindingList中項目的類型。

然后您可以將ComboBox的SelectedItem綁定為

comboBoxFactory.SetValue(ComboBox.SelectedItemProperty, new Binding("SelectedBinding"));

您可以將TextBlock綁定更新為

  dgc.ClipboardContentBinding = new Binding("SelectedBinding.Description");