asp.net core 如何统一json序列化格式

oldconfig.AllFields =  Newtonsoft.Json.JsonConvert.SerializeObject(sqlParameters.AllFields);

在start.cs文件中

JsonConvert.DefaultSettings = new Func<JsonSerializerSettings>(() =>{JsonSerializerSettings jsonsetting = new JsonSerializerSettings(){Formatting = Formatting.None,ContractResolver = new DefaultContractResolver()};//日期类型默认格式化处理jsonsetting.DateFormatHandling = Newtonsoft.Json.DateFormatHandling.MicrosoftDateFormat;jsonsetting.DateFormatString = "yyyy-MM-dd HH:mm:ss"; jsonsetting.Converters.Add(new IsoDateTimeConverter() { DateTimeFormat = "yyyy-MM-dd HH:mm:ss" });jsonsetting.Converters.Add(new StringEnumConverter());jsonsetting.ContractResolver = new DefaultContractResolver();//空值处理jsonsetting.NullValueHandling = NullValueHandling.Include;return jsonsetting;});上面用来初始化， 后台代码中Newtonsoft.Json.JsonConvert.SerializeObject() 方法的默认参数
上面用来初始化， 后台代码中Newtonsoft.Json.JsonConvert.SerializeObject() 方法的默认参数
上面用来初始化， 后台代码中Newtonsoft.Json.JsonConvert.SerializeObject() 方法的默认参数下面用来初始化， Controller返回对象的json格式化参数。
下面用来初始化， Controller返回对象的json格式化参数。
下面用来初始化， Controller返回对象的json格式化参数。// services.MvcOptions.EnableEndpointRouting = falseservices .AddMvc(options => options.EnableEndpointRouting = false)//.SetCompatibilityVersion(CompatibilityVersion.Version_3_0);//解决JObject接收参数的问题 start//.AddNewtonsoftJson().AddNewtonsoftJson(options =>{options.SerializerSettings.ContractResolver = new DefaultContractResolver();//长整型序列化为字符串                    //options.SerializerSettings.Converters.Add(new LongToStringConverter());//枚举转字符串，而不是数值options.SerializerSettings.Converters.Add(new StringEnumConverter());//时间格式化                    //options.SerializerSettings.Converters.Add(new DateTimeFormatConverter("yyyy-MM-dd HH:mm:ss"));options.SerializerSettings.DateFormatString = "yyyy-MM-dd HH:mm:ss";options.SerializerSettings.Converters.Add(new IsoDateTimeConverter() { DateTimeFormat = "yyyy-MM-dd HH:mm:ss" });//空值处理，序列化和反序列化时， 空值也要转换输出。options.SerializerSettings.NullValueHandling = NullValueHandling.Include;}).AddJsonOptions(options => {options.JsonSerializerOptions.Converters.Add(new JsonStringEnumConverter()); });//解决JObject接收参数的问题;