如何附加行為以在后面的代碼中創建的WPF控件？

Question

我正在使用如何使WPF組合框具有XAML中最寬元素的寬度中所述的ComboBox行為？

與問題不同，我在后面的代碼中創建了ComboBox（用於工具欄）：

    private static ComboBox GetCombobox(ToolbarItemViewModel item)
    {
        var cmbBox = new ComboBox();
        cmbBox.Name = item.Name;
        item.CmbBoxItems = new ObservableCollection<KeyValuePair<string, string>>(NisDllInterface.GetComboBoxValues(NisDllInterface.MainFrameName, item.Name));
        Binding itemsBinding = new Binding("CmbBoxItems");
        itemsBinding.Source = item;
        cmbBox.SetBinding(ComboBox.ItemsSourceProperty, itemsBinding);
        cmbBox.DisplayMemberPath = "Value";

        Binding selItemBinding = new Binding("SelectedItem");
        selItemBinding.Source = item;
        cmbBox.SetBinding(ComboBox.SelectedItemProperty, selItemBinding);

        return cmbBox;
    }

通過在上述方法中添加Loaded事件處理程序，可以使示例工作：

        cmbBox.Loaded += (sender, args) =>
        {
            ComboBox comboBox = sender as ComboBox;
            Action action = () => { comboBox.SetWidthFromItems(); };
            comboBox.Dispatcher.BeginInvoke(action, DispatcherPriority.ContextIdle);
        };

但是我想知道如何像在XAML中一樣將行為附加到代碼后面：

<ComboBox behaviors:ComboBoxWidthFromItemsBehavior.ComboBoxWidthFromItems="True">

Answer 1

必須有一個叫做

ComboBoxWidthFromItemsBehavior.SetComboBoxWidthFromItems(c‌​ontrol, bool) 

您可以使用。