序列化继承自 ObservableObject 的 model

Question

I want to serialize and deserialize a model object that inherits from MvvmLight.ObservableObject . Trying to deserialize the object with System.Runtime.Serialization.Json.DataContractJsonSerializer.ReadObject throws a System.Runtime.Serialization.InvalidDataContractException with the info that the base class (ie MvvmLight.ObservableObject ) doensn't have the DataContractAttribute or SerializableAttribute . My model that don't work looks like that:

using GalaSoft.MvvmLight;

[DataContract]
public class MyModel : ObservableObject
{
  [IgnoreDataMember]
  private int _id;
  [DataMember]
  public int Id
  {
      get => _id;
      set => Set(ref _id, value);
  }
}

After removing [DataContract] there's no exception but also no deserialized data.

A solution could be to create a copy of MyModel called MyModelSerializable with the same properties but that don't inherit from ObservableObject and use that for serializing. After deserializing, the MyModel objects could be created with the data of the MyModelSerializable objects. Is there a better solution?

Edit: As requested a link to the code of GalaSoft.MvvmLight.ObservableObject : https://github.com/lbugnion/mvvmlight/blob/master/GalaSoft.MvvmLight/GalaSoft.MvvmLight%20(PCL)/ObservableObject.cs

Answer 1

You cant use DataContract Attribute here if you cant mark the ObservableObject with DataContract. SO in your case i think you couldnt mark the ObservableObject.

You have to Create another Class with the desired items you want to serialize without class derived ObservableObject

Maybe You could implement (in another Serialized Class with DataContract Attribute which sees MyModel) in your project:

    [OnSerializing]
    void PrepareForSerialization(StreamingContext sc)
    {
        //get items from MyModel and inject in new class serializable
    }