含有动态未知字段的 JSON 反序列化

一般来说，正常的 json 长这个模样：

{
  'Name': 'Bad Boys',
  'ReleaseDate': '1995-4-7T00:00:00',
  'Genres': [
    'Action',
    'Comedy'
  ]
}

这个时候我们只需要建立对应的类，直接反序列化就行（比如宇宙第一VS的 “编辑” -- “选择性粘贴” -- “将JSON粘贴为类”）

    public class Movie
    {
        public string Name { get; set; }
        public string ReleaseDate { get; set; }
        public string[] Genres { get; set; }
    }

    Movie m = JsonConvert.DeserializeObject<Movie>(json);

不过有的时候会有些不负责任的 JSON

有时候它长这样：

{
	"mapping": [{
		"PHARMACOLOGY": "TU",
		"NEUROSCIENCES": "RU"
	}]
}

有时候它还长这样：

{
	"mapping": [{
		"TELECOMMUNICATIONS": "YE"
	}]
}

这个时候序列化我们就需要 字典 （Dictionary）

这个时候我们的类要长这样：

    public class Rootobject
    {
        public List<Dictionary<string, string>> mapping { get; set; }
    }

然后照常反序列化：

Rootobject root = JsonConvert.DeserializeObject<Rootobject>(JSON);

循环下输出结果：

                        i++;
                        foreach (var temp in root.mapping[0])
                        {
                            Console.WriteLine(String.Format("Number:{0},Keys:{1},Values:{2}", i, temp.Key, temp.Value));
                        }

结果如下：

如果更麻烦一点的呢？

比如我在 https://blog.csdn.net/jdsjlzx/article/details/76785239 看到的这个json：

{
	"resultcode": "",
	"reason": "successed!",
	"result": {
		"sk": {
			"temp": "",
			"wind_direction": "东北风",
			"wind_strength": "2级",
			"humidity": "28%",
			"time": "17:38"
		},
		"today": {
			"temperature": "15℃~26℃",
			"weather": "多云转晴",
			"wind": "东北风微风",
			"week": "星期日",
			"city": "桂林",
			"date_y": "2015年10月11日",
			"dressing_index": "舒适",
			"dressing_advice": "建议着长袖T恤、衬衫加单裤等服装。年老体弱者宜着针织长袖衬衫、马甲和长裤。",
			"uv_index": "弱",
			"comfort_index": "",
			"wash_index": "较适宜",
			"travel_index": "较适宜",
			"exercise_index": "较适宜",
			"drying_index": ""
		},
		"future": {
			"day_20151011": {
				"temperature": "15℃~26℃",
				"weather": "多云转晴",
				"wind": "东北风微风",
				"week": "星期日",
				"date": ""
			},
			"day_20151012": {
				"temperature": "16℃~27℃",
				"weather": "晴转多云",
				"wind": "微风",
				"week": "星期一",
				"date": ""
			},
			"day_20151013": {
				"temperature": "16℃~26℃",
				"weather": "多云转晴",
				"wind": "微风",
				"week": "星期二",
				"date": ""
			},
			"day_20151014": {
				"temperature": "17℃~27℃",
				"weather": "晴",
				"wind": "北风微风",
				"week": "星期三",
				"date": ""
			},
			"day_20151015": {
				"temperature": "17℃~28℃",
				"weather": "晴",
				"wind": "北风微风",
				"week": "星期四",
				"date": ""
			},
			"day_20151016": {
				"temperature": "17℃~30℃",
				"weather": "晴",
				"wind": "北风微风",
				"week": "星期五",
				"date": ""
			},
			"day_20151017": {
				"temperature": "17℃~30℃",
				"weather": "晴",
				"wind": "北风微风",
				"week": "星期六",
				"date": ""
			}
		}
	},
	"error_code": 0
}

继续使用 Dictionary 定义类：

    public class WeatherRootobject
    {
        public string resultcode { get; set; }
        public string reason { get; set; }
        public Result result { get; set; }
        public int error_code { get; set; }
    }

    public class Result
    {
        public Sk sk { get; set; }
        public Today today { get; set; }
        public Dictionary<string, Weather> future { get; set; }
    }

    public class Sk
    {
        public string temp { get; set; }
        public string wind_direction { get; set; }
        public string wind_strength { get; set; }
        public string humidity { get; set; }
        public string time { get; set; }
    }

    public class Today
    {
        public string temperature { get; set; }
        public string weather { get; set; }
        public string wind { get; set; }
        public string week { get; set; }
        public string city { get; set; }
        public string date_y { get; set; }
        public string dressing_index { get; set; }
        public string dressing_advice { get; set; }
        public string uv_index { get; set; }
        public string comfort_index { get; set; }
        public string wash_index { get; set; }
        public string travel_index { get; set; }
        public string exercise_index { get; set; }
        public string drying_index { get; set; }
    }

    public class Weather
    {
        public string temperature { get; set; }
        public string weather { get; set; }
        public string wind { get; set; }
        public string week { get; set; }
        public string date { get; set; }
    }

然后反序列化输出：

            WeatherRootobject weathers = JsonConvert.DeserializeObject<WeatherRootobject>(json);
            foreach (var temp in weathers.result.future)
            {
                Console.WriteLine(String.Format("Day:{0},Week:{1},Temperature:{2}",  temp.Key, temp.Value.week, temp.Value.temperature));
            }

结果如下：