c# - Xamarin 与 Kinvey 数据库

Question

我在 Xamarin 的项目中使用 Kinvey db。我熟悉解析指针功能。我想用 Kinvey 做同样的功能。Kinvey 也有参考功能。我试过了，但它总是将空值存储在 kinky db 中。所以我真的坚持这一点。这是我在 Kinvey 中的最终结果，它存储空值

结果： {"type":"KinveyRef","_id":"55f18c9d39d29b9e0f023748","_collection":"Color","_obj":null}

我的数据库模型类

[JsonObject(MemberSerialization.OptIn)]
public class Gallery
{
    public Gallery ()
    {
    }

    [JsonProperty("_id")]
    public string ID { get; set; }

    [JsonProperty]
    public string Name { get; set; }

    [JsonProperty]
    public KinveyReference<Color> color;
}


[JsonObject(MemberSerialization.OptIn)]
public class Color
{ 
    public Color ()
    {
    }

    [JsonProperty("_id")]
    public string ID { get; set; }

    [JsonProperty]
    public string Title { get; set; }

    [JsonProperty]
    public string Code { get; set; }

}

将数据存储在数据库中的代码是

 AsyncAppData<Gallery> entityCollection = Client.AppData<User>("Gallery", typeof(Gallery));
            entityCollection.setCache(cache, CachePolicy.CACHE_FIRST);

            AsyncAppData<Color> colorCollection = Client.AppData<Color>("Color", typeof(Color));
            colorCollection.setCache(lcache, CachePolicy.CACHE_FIRST);

            Color color = new Color();
            color.Title = "Pink";
            color.Code = "ff00ff";

            Color colorEnt  = await colorCollection.SaveAsync(color);

            Gallery gallery = new Gallery();
            gallery.Name = "HARSHAD";
            gallery.ID = "1211222as";
            KinveyReference<Color> reference = new KinveyReference<Color>("Color",colorEnt.ID); 
            gallery.color = reference;

            Gallery entity = await entityCollection.SaveAsync(gallery);

如果需要更多详细信息，请告诉我。