c# - 将 JSON 字符串添加到 C# 中的现有字符串

Question

我正在尝试向现有字符串添加 JSON 字符串，但仍然无法成功。

这是原始字符串:originalJSONString

{
  "properties": [
    "property1",
    "property2"
  ]
}

我想将此添加到原始字符串中: JSONStringIwantToAdd

{
  "filter": {
    "Name": "some filter name",
    "Parameters": {
      "LookupKey": "somekey",
      "LookupValue": "somevalue"
    }
  }
}

要生成这样的结果字符串: finalJSONString

{
  "properties": [
    "property1",
    "property2"
  ],
  "filter": {
    "Name": "some filter name",
    "Parameters": {
      "LookupKey": "somekey",
      "LookupValue": "somevalue"
    }
  }
}

到目前为止，这是我的方向，但我在 propertiesJObject 中为空并且事后想不通。

这甚至是我要去的正确方向吗？

        var originalJObj = JObject.Parse(originalJSONString);
        var tobeaddedJObj = JObject.Parse(JSONStringIwantToAdd);
        var propertiesJObject = originalJObj["properties"] as JObject;
        propertiesJObject.Add(tobeaddedJObj);
        var serializer = new JsonSerializer { ContractResolver = new CamelCasePropertyNamesContractResolver() };
        var finalJSONString = JObject.FromObject(originalJObj, serializer).ToString();

有人可以帮我解决这个问题吗？

感谢您的时间!

Answer 1

JSON.NET 包含的功能可以完全满足您的需求:JContainer.Merge

请注意， Merge 会修改原始对象，而不是返回一个新对象:

var original = JObject.Parse(@"{
  ""properties"": [
    ""property1"",
    ""property2""
  ]
}");

var toAdd = JObject.Parse(@"{
  ""filter"": {
    ""Name"": ""some filter name"",
    ""Parameters"": {
      ""LookupKey"": ""somekey"",
      ""LookupValue"": ""somevalue""
    }
  }
}");

original.Merge(toAdd, new JsonMergeSettings
{
    // union array values together to avoid duplicates
    MergeArrayHandling = MergeArrayHandling.Union
});

fiddle 链接: https://dotnetfiddle.net/o51GuA