来自FrameworkElementFactory类型组合框的Interaction.GetBehaviors

Question

我试图隐藏一个从FrameworkElementFactory设置的动态组合框。如果我尝试组合框作为参数，我会得到错误' Combobox‘是一个类型，这在给定的上下文中是无效的，如果我尝试fElement作为参数，那么它会给出错误“无法从'System.Windows.FrameworkElementFactory’转换为'System.Windows.DependencyObject'”我需要C#而不是xaml或ASP.net中的解决方案。

 FrameworkElementFactory fElement = new FrameworkElementFactory(typeof(ComboBox));

       fElement.SetValue(ComboBox.WidthProperty, 125D);
            fElement.SetValue(ComboBox.ItemsSourceProperty, choices);
            fElement.SetValue(ComboBox.DisplayMemberPathProperty, "Value");
            fElement.SetValue(ComboBox.SelectedValuePathProperty, "Value");
            fElement.SetValue(ComboBox.NameProperty, "CONAAM" + rowOnderdeel.OnderdeelID);
            //fElement.SetValue(ComboBox.NameProperty, Onderdeelnaam);
            fElement.AddHandler(Selector.SelectionChangedEvent, new SelectionChangedEventHandler(cbCursistOnderdeelResultaat));
            fElement.SetBinding(ComboBox.TextProperty, bind);
            Interaction.GetBehaviors(ComboBox).Add(new HideComboxBehavior());

Answer 1

解决方案是使用System.Windows.Style和使用setter来触发组合框的可见性。

FrameworkElementFactory fElement = new FrameworkElementFactory(typeof(ComboBox));
                    fElement.SetValue(ComboBox.WidthProperty, 125D);
                    fElement.SetValue(ComboBox.ItemsSourceProperty, Resultaten);
                    fElement.SetValue(ComboBox.DisplayMemberPathProperty, "Value");
                    fElement.SetValue(ComboBox.SelectedValuePathProperty, "Key");
                    fElement.SetValue(ComboBox.SelectedValueProperty, new Binding(column.ColumnName));

                    Style cbStyle = new Style(typeof(ComboBox));
                    Setter cbSetter = new Setter(ComboBox.VisibilityProperty, Visibility.Visible);                  
                    cbStyle.Setters.Add(cbSetter);

                    DataTrigger cbDataTrigger = new DataTrigger();
                    Binding cbBinding = new Binding(column.ColumnName);

                    cbDataTrigger.Value = 0;

                    Setter cbDataSetter = new Setter(ComboBox.VisibilityProperty, Visibility.Hidden);

                    cbDataTrigger.Setters.Add(cbDataSetter);
                    cbDataTrigger.Binding = cbBinding;
                    cbStyle.Triggers.Add(cbDataTrigger);               

                    fElement.SetValue(ComboBox.StyleProperty, cbStyle);

                    DataTemplate dataTemplate = new DataTemplate();
                    dataTemplate.VisualTree = fElement;
                    gvc.CellTemplate = dataTemplate;