Question

我正在尝试将JSON序列化为没有键/值的普通格式，但不幸的是，提供的类将键和值字符串添加到JSON文件中。这是我的Post方法：

[TestMethod]
public void PostTest()
{
    var request = new HttpRequestMessage();
    request.Headers.Add("X-My-Header", "success");

    MyCaseRequest data = new MyCaseRequest()
    {
        Name = "TestAgre",
        ExpirationDateTime = "2016-07-14T00:00:00.000Z",
        Signatories = new List<SignatoryRequest>
        {
            new MyRequest() { Type = MyType.Comp, Id = "11111" },
            new MyRequest() { Type = MyType.Per, Id = "2222" }
        },
        Documents = new SortedList<string, ThingsRequest>()
        {
            {"0" , new ThingsRequest() { Name = "Test",  Description = "Short description about", Length = 4523 }},
            {"1" , new ThingsRequest() { Name = "Test1",  Description = "short description about", Length = 56986 }}
        }
    };

    JsonSerializerSettings settings = new JsonSerializerSettings();
    settings.ContractResolver = new DictionaryAsArrayResolver();

    settings.Formatting = Formatting.Indented;
    string json = JsonConvert.SerializeObject(data, settings);

    var statusCode = sendJsonDemo.SendJsonDemo(json);
}

这是我的类，它将已排序的字典序列化为对象数组：

class DictionaryAsArrayResolver : DefaultContractResolver
{
    protected override JsonContract CreateContract(Type objectType)
    {
        if (objectType.GetInterfaces().Any(i => i == typeof(IDictionary) ||
                (i.IsGenericType &&
                 i.GetGenericTypeDefinition() == typeof(IDictionary<,>))))
         {
             return base.CreateArrayContract(objectType);
         }

         return base.CreateContract(objectType);
     }
}

这是我的输出：

{
  "Name": "TestAgreement",
  "ExpirationDateTime": "2016-07-14T00:00:00.000Z",
  "Signatories": [
    {
      "Type": "Comp",
      "Id": "11111"
    },
    {
      "Type": "Per",
      "Id": "2222"
    }
  ],
  "Documents": [
    {
      "Key": "0",
      "Value": {
        "Name": "Test",
        "Description": "Short description about",
        "Length": 4523
      }
    },
    {
      "Key": "1",
      "Value": {
        "Name": "Test1",
        "Description": "short description about",
        "Length": 56986
      }
    }
  ],
  "Metadata": []
}

Answer 1

您必须将Documents属性更改为IEnumerable<ThingsRequest>，以便它没有键/值。

如果你有一个SortedList作为输入，你可以这样做，使其成为一个简单的IEnumerable<ThingsRequest>（但仍然是有序的）：Documents.Values。

Answer 2

我不确定您期望得到什么JSON，因为您没有在您的问题中向我们展示。你说你想要＆＃34;没有键/值的正常格式＆＃34;，这有点模糊。 SortedList<K, V>实施IDictionary<K, V>，＆＃34;正常＆＃34;字典的序列化格式如下：

{
  "Documents": {
    "0": {
      "Name": "Test",
      "Description": "Short description about",
      "Length": 4523
    },
    "1": {
      "Name": "Test1",
      "Description": "short description about",
      "Length": 56986
    }
  }
}

在您的代码中，您使用自定义解析程序将所有词典的合同更改为JsonArrayContract。这告诉Json.Net将SortedList序列化为一组键值对，这正是你获得＆＃34; Key＆＃34;和＆＃34;价值＆＃34;输出中的属性。如果你想要＆＃34;正常＆＃34;输出，然后不要使用解析器来更改合同。

然而，我怀疑你正在寻找的只是一个简单的项目，就像你会得到普通的List<T>：

{
  "Documents": [
    {
      "Name": "Test",
      "Description": "Short description about",
      "Length": 4523
    },
    {
      "Name": "Test1",
      "Description": "short description about",
      "Length": 56986
    }
  ]
}

如果是这样，您可以使用自定义JsonConverter而不是解析程序来获取此输出。以下是转换器所需的代码：

class DictionaryToValuesArrayConverter : JsonConverter
{
    public override bool CanConvert(Type objectType)
    {
        return typeof(IDictionary).IsAssignableFrom(objectType);
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        IDictionary dict = (IDictionary)value;
        JArray array = JArray.FromObject(dict.Values);
        array.WriteTo(writer);
    }

    public override bool CanRead
    {
        get { return false; }
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        throw new NotImplementedException();
    }
}

_{注意：此转换器仅处理序列化，而不是反序列化。如果您需要完成全程往返，则还需要实现ReadJson，这超出了本答案的范围。}

要使用转换器，请将其添加到Converters中的JsonSerializerSettings集合中：

JsonSerializerSettings settings = new JsonSerializerSettings();
settings.Converters.Add(new DictionaryToValuesArrayConverter());
string json = JsonConvert.SerializeObject(data, settings);

演示小提琴：https://dotnetfiddle.net/HFeXLC

将SortedList序列化为对象数组并删除键/值

2 个答案: