c# - 将 JsonMediaTypeFormatter 应用于 Json

Question

我有以下格式化程序

 JsonMediaTypeFormatter formatter = new JsonMediaTypeFormatter();
 formatter.SerializerSettings.NullValueHandling = Newtonsoft.Json.NullValueHandling.Ignore;
 formatter.SerializerSettings.Formatting = Newtonsoft.Json.Formatting.Indented;
 formatter.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();

我想在序列化对象时应用这种格式

 var jsonString = JsonConvert.SerializeObject(obj, formatter);

但是，我收到一个错误说明

 Cannot convert from System.Net.Http.Formatting.JsonMediaTypeFormatter to Newtonsoft.Json.Formatting

Answer 1

尝试以下操作，在我的情况下效果很好:

// Create a Serializer with specific tweaked settings, like assigning a specific ContractResolver

    var newtonSoftJsonSerializerSettings = new JsonSerializerSettings
    {
        ReferenceLoopHandling = ReferenceLoopHandling.Ignore, // Ignore the Self Reference looping
        PreserveReferencesHandling = PreserveReferencesHandling.None, // Do not Preserve the Reference Handling
        ContractResolver = new CamelCasePropertyNamesContractResolver(), // Make All properties Camel Case
        Formatting = Newtonsoft.Json.Formatting.Indented
    };

// To the final serialization call add the formatter as shown underneath

var result = JsonConvert.SerializeObject(obj,newtonSoftJsonSerializerSettings.Formatting);

或者

 var result = JsonConvert.SerializeObject(obj,Newtonsoft.Json.Formatting.Indented);

在实际代码中，这是我们如何使用具有特定设置的 Json 序列化程序，对于 MVC 项目，使用上面创建的 newtonSoftJsonSerializerSettings:

  // Fetch the HttpConfiguration object
  HttpConfiguration jsonHttpconfig = GlobalConfiguration.Configuration;    

// Add the Json Serializer to the HttpConfiguration object
    jsonHttpconfig.Formatters.JsonFormatter.SerializerSettings = newtonSoftJsonSerializerSettings;

    // This line ensures Json for all clients, without this line it generates Json only for clients which request, for browsers default is XML
    jsonHttpconfig.Formatters.JsonFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/html"));

因此所有的Http请求都使用相同的序列化器(newtonSoftJsonSerializerSettings)序列化