c# - XamlWriter.Save 丢失了来自 ListBox 的 ItemsSource 绑定(bind)

Question

我有一个自定义的 ContentControl

public class DataControl : ContentControl
{
    public List<DataItem> Options
    {
        get { return (List<DataItem>)GetValue(OptionsProperty); }
        set { SetValue(OptionsProperty, value); }
    }

    public static readonly DependencyProperty OptionsProperty =
        DependencyProperty.Register("Options", typeof(List<DataItem>), typeof(DataControl));

    public DataControl()
    {
        Options = new List<DataItem>();
    }

    public string Label
    {
        get { return (string)GetValue(LabelProperty); }
        set { SetValue(LabelProperty, value); }
    }

    // Using a DependencyProperty as the backing store for Label.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty LabelProperty =
        DependencyProperty.Register("Label", typeof(string), typeof(DataControl));
}

public class DataItem
{
    public DataItem(string key, string value)
    {
        Key = key;
        Value = value;
    }

    public string Key { get; set; }

    public string Value { get; set; }
}

其模板由以下样式应用:

<Style TargetType="{x:Type local:DataControl}" x:Key="DefaultStyle">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type local:DataControl}">
                <StackPanel>
                <ListBox ItemsSource="{TemplateBinding Options}" >
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                        <Label Content="{Binding Key}" />
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>
                <Label Content="{TemplateBinding Label}" />
                </StackPanel>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

如果我使用 XamlWriter 保存此样式然后再次读回它，则 ItemsSource 绑定(bind)会丢失，但 Label 上的 Content 绑定(bind)不会。

Style style = Application.Current.TryFindResource("DefaultStyle") as Style;

string s = XamlWriter.Save(style);
Style secondStyle = XamlReader.Parse(s) as Style;

有没有办法确保正确序列化 ItemsSource 绑定(bind)或轻松将其添加回去？

尝试从另一个项目的 ResourceDictionary 获取样式时也会发生这种情况，例如

ResourceDictionary styles = new ResourceDictionary();
styles.Source = new Uri(String.Format("pack://application:,,,/StyleCopyTest;component/Styles/{0}Styles.xaml", type));
return styles;

Answer 1

在 WPF 源代码中，ItemsSource 定义为

[Bindable(true), CustomCategory("Content"),     DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
public IEnumerable ItemsSource { get; set; }

所以这不能被 XamlWriter 序列化。

因此您必须编写自己的序列化程序或使用提到的方法 here