c#向Json文件添加新条目[重复]

Question

我正在尝试将成员添加到 Json 文件，但我不知道如何将新成员添加到现有文件。

{
  "Members": {
    "Example1": {
      "LastOnline": "2016-05-16T12:09:04.6459345Z",
      "TimeUntillEx": "2016-05-16T12:09:04.6459345Z",
      "Paied": true
    },
  }
}

问题是“Example1”已经是用户名。我不知道我是否应该尝试添加更多或复制现有并编辑复制的文本。 希望有人能帮忙。

顺便说一句。我是新手，如有任何错误，请见谅

Answer 1

首先，我要做的是将Members 属性更改为array，而不是object。然后，我会做这样的事情：

//original json. Notice that I added '[ ]' to make it an array
var json = "{ 'Members': " +
             "[ " +
                 "{'Example1': " +
                     "{ 'LastOnline': '2016-05-16T12:09:04.6459345Z', " +
                       "'TimeUntillEx': '2016-05-16T12:09:04.6459345Z', " +
                       "'Paied': true" +
                     "}, " +
                 "} " +
             "] " +
           "}";

//new member
var newMember = "{ 'Example2': " +
                    "{ 'LastOnline': '2016-12-16T12:09:04.6459345Z', " +
                      "'TimeUntillEx': '2016-12-16T12:09:04.6459345Z', " +
                      "'Paied': false" +
                    "}, " +
                "}";

//parse the json
var obj = JObject.Parse(json);

//get members array
var array = obj.GetValue("Members") as JArray;

//parse the new member and add it to the array
var add = JObject.Parse(newMember);

array.Add(add);

//serialize the json
var output = JsonConvert.SerializeObject(obj, Formatting.Indented);

//print the results
Console.WriteLine(output);

为此，您将需要

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;