在.NET Core 1.0(所有API响应)的全局级别上，如何配置Startup.cs以便在JSON响应中删除/忽略空字段？
使用Newtonsoft.Json，您可以将以下属性应用于属性，但我希望避免将其添加到每个属性中:
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
public string FieldName { get; set; }
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
public string OtherName { get; set; }
[.NET Core 1.0]个
In Startup.cs, you can attach JsonOptions to the service collection and set various configurations, including removing null values, there:
public void ConfigureServices(IServiceCollection services)
{
services.AddMvc()
.AddJsonOptions(options => {
options.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;
});
}
[.NET Core 3.1]
Instead of this line:
options.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;
使用:
options.JsonSerializerOptions.IgnoreNullValues = true;
[.NET 5.0]
Instead of both variants above, use:
options.JsonSerializerOptions.DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull;
The variant from .NET Core 3.1 still works, but it is marked as NonBrowsable (so you never get the IntelliSense hint about this parameter), so it is very likely that it is going to be obsoleted at some point.