将字段添加到JSON数组 [英] Add a field into JSON array

问题描述

我得到了一个带有如下数组的JSON字符串:

I got a JSON string with an array like this:

 {
  "Id": 123,
  "Username": "Sr. X",
  "Packages": [
    {
      "Name": "Cups",
      "SupplierId": 1,
      "ProviderGroupId": 575,
      "SupplierName": "Foo Cups"
    },
    {
      "Name": "Pins",
      "SupplierId": 5,
      "ProviderGroupId": 1082,
      "SupplierName": "Foo Pins"
    }
  ]
}

，我想向Packages数组中添加一个新字段，例如:

and I want to add a new field into Packages array like:

"Packages": [
    {
      "Name": "Cups",
      "SupplierId": 1,
      "ProviderGroupId": 575,
      "SupplierName": "Foo Cups",
      "New Field": "Value"
    },...

现在我可以添加一个新字段，但是在主对象中，我正在使用Json.NET库来完成这项工作，但是看来文档还没有达到这个水平.

Right now I can add a new field but in the main object, I'm using Json.NET library to do the job, but it seems that the documentation doesn't reach that level.

你们中有人做过吗?

推荐答案

JObject实现IDictionary.

JObject implemets IDictionary.

var jObj = JObject.Parse(json);
foreach(var item in jObj["Packages"])
{
    item["New Field"] = "Value";
}
var newjson = jObj.ToString(Newtonsoft.Json.Formatting.Indented);

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