c# - 如何修复无法反序列化 JSON，与 key "1"， "2"混淆

Question

我对编号(键)新闻列表(数组)感到困惑

json 字符串是有效的，在 nodeJS 中它设法输出我需要的值。

JSON 字符串原样

{
  "newsalert": [{
    "newslist": {
      "1": {
        "newsid": "4321",
        "headline": "Great White Shark Found",
        "newscode": "GWS",
        "newstime": "10:04:32"
      },
      "2": {
        "newsid": "8031",
        "headline": "Polar Bear Escaped",
        "newscode": "PBE",
        "newstime": "09:28:03"
      }
    }
  }]
}

C#代码

class MainNews {
    public Dictionary<string, newslist[]> newsalert { get; set; }
}

class newslist {
    public int newsid { get; set; }
    public string headline{ get; set; }
    public string newscode { get; set; }
    public string newstime { get; set; }
}

static void ShowObject(MainNews obj) {
    foreach (var item in obj.news.Values.ElementAt(0)) {
        MessageBox.Show(item.headline);
    }
}

private void BtnTest_Click(object sender, RoutedEventArgs e) {
    JavaScriptSerializer json_serializer = new JavaScriptSerializer();
    var xnews = JsonConvert.DeserializeObject<MainNews>(jsonstring);
    ShowObject(xnews);
}

错误

Newtonsoft.Json.JsonSerializationException: 'Cannot deserialize the current JSON array because the type requires a JSON object

Answer 1

您在根目录和词典之间缺少一个步骤。
newsalert 是具有属性名称 newslist 的对象的集合。
这是你的字典。

public class MainNews
{
    public List<NewAlert> newsalert { get; set; }
}

public class NewAlert
{
    public Dictionary<int, NewItem> newslist { get; set; }
}

public class NewItem
{
    public string newsid { get; set; }
    public string headline { get; set; }
    public string newscode { get; set; }
    public string newstime { get; set; }
}

你可以简单地:

string input = @"{
  ""newsalert"": [{
    ""newslist"": {
      ""1"": {
        ""newsid"": ""4321"",
        ""headline"": ""Great White Shark Found"",
        ""newscode"": ""GWS"",
        ""newstime"": ""10:04:32""
      },
      ""2"": {
        ""newsid"": ""8031"",
        ""headline"": ""Polar Bear Escaped"",
        ""newscode"": ""PBE"",
        ""newstime"": ""09:28:03""
      }
    }
  }]
}";


var result =  JsonConvert.DeserializeObject<MainNews>(input);       
result.newsalert.SelectMany(x=> x.newslist.Values).Dump();

现场演示:https://dotnetfiddle.net/Ar5ocP