Question

我正在用c＃构建一个RESTful Web服务。

所以我构建了这样的DTo模型：

namespace WebService.Models
{
    [DataContract(Name = "VitalSigns")]
    public class VitalSignsDTO
    {
        [DataMember(Name = "id", Order = 1)]
        public int id { get; set; }

        [DataMember(Name = "name", Order = 2)]
        public string name { get; set; }

        [DataMember(Name = "valore", Order = 3)]
        public string valore { get; set; }

        [DataMember(Name = "dataOra", Order = 3)]
        public DateTime? dataOra { get; set; }
    }
}

现在，这是JSON的回应：

{
    "id": 1,
    "name": "Altezza corporea",
    "valore": null,
    "dataOra": null
},
{
    "id": 2,
    "name": "Peso corporeo",
    "valore": null,
    "dataOra": null
}

现在我想知道，如果可以隐藏没有值的valore和dataOra字段。

Answer 1

将[JsonIgnore]属性用于您的媒体资源。

namespace WebService.Models
{
    [DataContract(Name = "VitalSigns")]
    public class VitalSignsDTO
    {
        [DataMember(Name = "id", Order = 1)]
        public int id { get; set; }

        [DataMember(Name = "name", Order = 2)]
        public string name { get; set; }

        [JsonIgnore]
        [DataMember(Name = "valore", Order = 3)]
        public string valore { get; set; }

        [JsonIgnore]
        [DataMember(Name = "dataOra", Order = 3)]
        public DateTime? dataOra { get; set; }
    }
}

Answer 2

如果您使用的是 .Net Core WebAPI ，则可以在中间件（Startup.cs）中配置JSON Serializer。

   public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc()
                .AddJsonOptions(options => { options.SerializerSettings.NullValueHandling = NullValueHandling.Ignore; });
        services.AddAutoMapper();
        services.RegisterServices();
    }

如果您在 ASP.NET WebAPI 中，请参阅Suppress properties with null value on ASP.NET Web API

c＃中的RESTful Web服务

2 个答案: