Question

我想从使用API的页面中读取，该API以下面的嵌套JSON格式提供结果：

{
    "rootEntity": "function",
    "count": 92516,
    "header": ["eventNumber", "startDate", "eventType"],
    "results": [
        ["40262-1", "Tuesday, December 12, 2017", "Corporate"],
        ["14361-1", "Monday, October 23, 2017", "School"],
        ["5014-1", "Friday, October 13, 2017", "Birthday"]
    ]
}

下面是我用来反序列化JSON的代码。但这是一个错误。我做错了什么？

using (StreamReader reader = new StreamReader(responseStream))
{         
     JObject o = (JObject)JToken.ReadFrom(new JsonTextReader(reader));

     reader.Close();
     JArray jarr = (JArray)o["results"];

     jsonString = String.Join("\\", jarr);
}

jsonString = jsonString.Trim('"');

var resp = JsonConvert.DeserializeObject<WebResp>(jsonString);
jsonResponse = resp.results.ToArray();

Answer 1

我会创建一个类似下面的辅助方法，将响应流中的结果转换为List<Dictionary<string, string>>：

static List<Dictionary<string, string>> GetResultsFromResponseStream(Stream responseStream)
{
    using (StreamReader streamReader = new StreamReader(responseStream))
    using (JsonReader jsonReader = new JsonTextReader(streamReader))
    {
        JObject obj = JObject.Load(jsonReader);
        JArray keys = (JArray)obj["header"];
        List<Dictionary<string, string>> results = obj["results"]
            .Children<JArray>()
            .Select(a => keys.Zip(a, (k, v) => new { Key = (string)k, Value = (string)v })
                             .ToDictionary(kvp => kvp.Key, kvp => kvp.Value))
            .ToList();

        return results;
    }
}

然后您可以像这样使用它，例如：

var results = GetResultsFromResponseStream(responseStream);

foreach (var item in results)
{
    foreach (var kvp in item)
    {
        Console.WriteLine(kvp.Key + ": " + kvp.Value);
    }
    Console.WriteLine();
}

输出：

eventNumber: 40262-1
startDate: Tuesday, December 12, 2017
eventType: Corporate

eventNumber: 14361-1
startDate: Monday, October 23, 2017
eventType: School

eventNumber: 5014-1
startDate: Friday, October 13, 2017
eventType: Birthday

小提琴：https://dotnetfiddle.net/UdFBtD

反序列化包含标头数组的JSON和单独的嵌套行数组

1 个答案: