c# - 使用 `DataContractSerializer` 序列化包含 WPF 画笔的类

Question

我有一个正在序列化的类:

using (FileStream fileStreamWriter = new FileStream(fileName, FileMode.Create))
{
    var dataContractSerializer = new DataContractSerializer(typeof(ClassToBeSerialized));
    dataContractSerializer.WriteObject(fileStreamWriter, btChartGroupList);
    fileStreamWriter.Close();
}

在我添加 Brush 类型的属性之前，这一切正常(称为 AreaBrush)到 ClassToBeSerialized 类。此 AreaBrush 属性可以是 SolidBrush、LinearGradientBrush 或 RadialGradientBrush。在序列化期间，DataContractSerializer 抛出:

Type 'System.Windows.Media.MatrixTransform' with data contract name 'MatrixTransform:http://schemas.datacontract.org/2004/07/System.Windows.Media' is not expected. Consider using a DataContractResolver if you are using DataContractSerializer or add any types not known statically to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding them to the list of known types passed to the serializer.

关于如何让它工作的任何想法？我尝试了 BrushConverter 但运气不佳。

我想我可以添加所有 3 种类型的画笔作为属性，但我希望有更好的解决方案。

编辑:在 VMaleev 的帮助下，我最终做到了:

        [IgnoreDataMember]
    public Brush AreaBrush
    {
        get { return _areaBrush; }
        set
        {
            SetProperty(ref _areaBrush, value, () => AreaBrush);
        }
    }

    [DataMember]
    public string AreaBrushText
    {
        get
        {
            using (StringWriter sw = new StringWriter())
            {
                XamlWriter.Save(AreaBrush, sw);
                string s = sw.ToString();
                return sw.ToString();
            }
        }
        set
        {
            AreaBrush = (Brush)XamlReader.Parse(value);
        }
    }

Answer 1

你不能简单地做到这一点。我建议您将 Brush 属性标记为 [XmlIgnore] 并使用 XamlWriter 分别对其进行序列化和反序列化。和 XamlReader :

// example of writing
using (var outfile = File.CreateText("Brush.xaml"))
{
    XamlWriter.Save(brush, outfile);
}

// example of reading
using (Stream s = File.OpenRead("Brush.xaml"))
{
    Brush b = XamlReader.Load(s);
}

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