Question

我有一个自定义类，它有一些来自外部dll的属性（我无法更改此dll类）

如果属性的类具有空构造函数，则此属性是序列化的，但如果只有一个构造函数必须提供参数，则它无法序列化。

例如，我从这个类中创建了一个实例并尝试序列化，结果是＆＃34; []＆＃34;

这是班级

public class Shape : ShapeBase,    
{
 public Shape(DocumentBase doc, ShapeType shapeType);    
 public Chart Chart { get; }
 public bool ExtrusionEnabled { get; }
 public Fill Fill { get; }
 public Color FillColor { get; set; }
 public bool Filled { get; set; }
 public Paragraph FirstParagraph { get; }
 public bool HasChart { get; }
 public bool HasImage { get; }
 public ImageData ImageData { get; }
 public Paragraph LastParagraph { get; }
 public override NodeType NodeType { get; }
 public OleFormat OleFormat { get; }
 public bool ShadowEnabled { get; }
 public SignatureLine SignatureLine { get; }
 public StoryType StoryType { get; }
 public Stroke Stroke { get; }
 public Color StrokeColor { get; set; }
 public bool Stroked { get; set; }
 public double StrokeWeight { get; set; }
 public TextBox TextBox { get; }
 public TextPath TextPath { get; }
 public override bool Accept(DocumentVisitor visitor);

}

我尝试像那样序列化

    Shape shape = new Shape(_wordDocument, ShapeType.TextPlainText);

    string json = JsonConvert.SerializeObject(shape, Formatting.Indented);

但其他课程就像

public class PdfSaveOptions : FixedPageSaveOptions
{

    public PdfSaveOptions();
    public int BookmarksOutlineLevel { get; set; }
    public PdfCompliance Compliance { get; set; }
    public bool CreateNoteHyperlinks { get; set; }
    public PdfCustomPropertiesExport CustomPropertiesExport { get; set; }
    public PdfDigitalSignatureDetails DigitalSignatureDetails { get; set; }
    public override DmlEffectsRenderingMode DmlEffectsRenderingMode { get; set; }
    public bool DownsampleImages { get; set; }
    public DownsampleOptions DownsampleOptions { get; }
    .......
}

它是序列化的。

所以我也尝试使用像

这样的选项

 ConstructorHandling = ConstructorHandling.AllowNonPublicDefaultConstructor

但没有用。

Answer 1

您仍然需要constructor没有参数。否则Deserialize方法无法创建该对象的实例。 Deserialize尝试实例化对象，然后使用Properties或Fields（取决于配置）为其设置数据。

如果您愿意，可以使用构造函数private或internal，只要其无参数即可。然后，你有一种在你的课外不存在的构造函数。

public class Shape : ShapeBase,    
{
 private Shape() {
   //here some inits
 }
 public Shape(DocumentBase doc, ShapeType shapeType);    
 public Chart Chart { get; }
 public bool ExtrusionEnabled { get; }
 public Fill Fill { get; }
 public Color FillColor { get; set; }
 public bool Filled { get; set; }
 public Paragraph FirstParagraph { get; }
 public bool HasChart { get; }
 public bool HasImage { get; }
 public ImageData ImageData { get; }
 public Paragraph LastParagraph { get; }
 public override NodeType NodeType { get; }
 public OleFormat OleFormat { get; }
 public bool ShadowEnabled { get; }
 public SignatureLine SignatureLine { get; }
 public StoryType StoryType { get; }
 public Stroke Stroke { get; }
 public Color StrokeColor { get; set; }
 public bool Stroked { get; set; }
 public double StrokeWeight { get; set; }
 public TextBox TextBox { get; }
 public TextPath TextPath { get; }
 public override bool Accept(DocumentVisitor visitor);

}

如果类没有空构造函数，Json.net无法序列化

1 个答案: