允许在几个字段上出现 Null Newtonsoft - 即使使用 NullValueHandling.Ignore 在

Question

我有一个需要打印的字段是假的，另一个整数需要为 0。 我不想在我的应用程序中的所有其他属性上添加忽略 atribute

我试过这个：[JsonProperty(Required = Newtonsoft.Json.Required.AllowNull(]

我已经尝试过应该序列化属性名称((

我试过编写自己的合同解析器...并添加属性。忽略 = 假

我还能做什么来打印这两个属性？

我的创业公司看起来像这样：

 services.AddMvc().AddJsonOptions(options =>
        {
            options.SerializerSettings.ContractResolver = new ShouldSerializeContractResolver();
            options.SerializerSettings.DefaultValueHandling = DefaultValueHandling.Ignore;
            options.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;
            options.SerializerSettings.Converters.Add(new StringEnumConverter());
         });

我的POCO看起来像这样：

public class Extension : Element
{
    [JsonProperty(NullValueHandling = NullValueHandling.Include)]
    public Boolean valueBoolean { get; set; }
    public DateTime valueDateTime { get; set; }   
    [JsonProperty(NullValueHandling = NullValueHandling.Include)]
    public int valueInteger { get; set; }
  public bool ShouldSerializevalueBoolean()
    {
 //this never gets called - I have played around with the case of this upper lower camel etc and neither of these are getting called... a few answers have had that issue as well fyi
        return true;
    }

我在解析器中尝试了很多...似乎没有任何效果：

protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)
    {
        JsonProperty property = base.CreateProperty(member, memberSerialization);
        if (property.DeclaringType == typeof(Extension) && property.PropertyName == "valueBoolean")
        {
            property.NullValueHandling = NullValueHandling.Include;
           // property.Ignored = false;
            //if (property.Ignored)
            //{
            //    property.Ignored = false;
            //}
            //property.ShouldSerialize =
            //    instance =>
            //   {
            //       Extension e = (Extension)instance;
            //       e.valueString = e.valueString + "made it here valueBoolean";
            //       return true;//e.ShouldSerializeValueBoolean();
            //   };
 }
        return property;
    }

Answer 1

再次查看此内容后，我的问题是这些属性不可为空。

[JsonProperty(NullValueHandling = NullValueHandling.Include)]
    public Boolean? valueBoolean { get; set; }
[JsonProperty(NullValueHandling = NullValueHandling.Include)]
    public int? valueInteger { get; set; }

解决了我的问题！

谢谢大家！