参考链接：/qq_35913274/article/details/79194046
get post 请求两种方式，我挑选了一种简单的方式
关于C#代码调用API接口获取到json数据的简单方法：
using (var client = new WebClient()){client.Encoding = Encoding.UTF8;string serviceAddress = "http://t./api/weather/city/"+ 101270101;//请求URL地址var data = client.DownloadString(serviceAddress);var obj = JsonConvert.DeserializeObject<JObject>(data);Console.Write(obj);Console.ReadKey();}
如果只是获取到json数据并没多大用处 需要对其解析;
/ 转json格式为C#类;
/tools/jsonescape.aspx json格式的各种操作;
/blog/305.html 天气API
下面以获取天气API信息为例：
该API返回数据格式如下：
{"time": "-09-22 12:37:21",//系统更新时间"cityInfo": {"city": "天津市", //请求城市"cityId": "101030100",//请求ID"parent": "天津",//上级，一般是省份"updateTime": "12:32"//天气更新时间},"date": "0922",//当前天气的当天日期"message": "Success !", //返回message"status": 200,//返回状态"data": {"shidu": "22%",//湿度"pm25": 15.0, //pm2.5"pm10": 46.0, //pm10"quality": "优", //空气质量"wendu": "24",//温度"ganmao": "各类人群可自由活动",//感冒提醒（指数）"forecast": [//今天+未来14天{"date": "22","ymd": "-09-22", //年月日 （新增）"week": "星期六", //星期 （新增）"sunrise": "05:57","high": "高温 26.0℃","low": "低温 15.0℃","sunset": "18:10","aqi": 55.0,"fx": "西北风","fl": "4-5级","type": "晴","notice": "愿你拥有比阳光明媚的心情"},{"date": "23","ymd": "-09-22", //年月日 （新增）"week": "星期日", //星期 （新增）"sunrise": "05:58","high": "高温 23.0℃","low": "低温 14.0℃","sunset": "18:09","aqi": 29.0,"fx": "西北风","fl": "4-5级","type": "晴","notice": "愿你拥有比阳光明媚的心情"},{"date": "24","ymd": "-09-22", //年月日 （新增）"week": "星期一", //星期 （新增）"sunrise": "05:59","high": "高温 24.0℃","low": "低温 15.0℃","sunset": "18:07","aqi": 25.0,"fx": "西北风","fl": "<3级","type": "晴","notice": "愿你拥有比阳光明媚的心情"},{"date": "25","ymd": "-09-22", //年月日 （新增）"week": "星期二", //星期 （新增）"sunrise": "06:00","high": "高温 24.0℃","low": "低温 16.0℃","sunset": "18:05","aqi": 56.0,"fx": "西南风","fl": "<3级","type": "晴","notice": "愿你拥有比阳光明媚的心情"},{"date": "26", "ymd": "-09-22", //年月日 （新增）"week": "星期三", //星期 （新增）"sunrise": "06:01","high": "高温 24.0℃","low": "低温 17.0℃","sunset": "18:04","aqi": 86.0,"fx": "西南风","fl": "3-4级","type": "阴","notice": "不要被阴云遮挡住好心情"}]}}
生成接受返回数据的类
public class CityInfo{public string city {get; set; }public string citykey {get; set; }public string parent {get; set; }public string updateTime {get; set; }}public class Forecast{public string date {get; set; }public string high {get; set; }public string low {get; set; }public string ymd {get; set; }public string week {get; set; }public string sunrise {get; set; }public string sunset {get; set; }public string aqi {get; set; }public string fx {get; set; }public string fl {get; set; }public string type {get; set; }public string notice {get; set; }}public class Yesterday{public string date {get; set; }public string high {get; set; }public string low {get; set; }public string ymd {get; set; }public string week {get; set; }public string sunrise {get; set; }public string sunset {get; set; }public string aqi {get; set; }public string fx {get; set; }public string fl {get; set; }public string type {get; set; }public string notice {get; set; }}public class Data{public string shidu {get; set; }public string pm25 {get; set; }public string pm10 {get; set; }public string quality {get; set; }public string wendu {get; set; }public string ganmao {get; set; }public List<Forecast> forecast {get; set; }public Yesterday yesterday {get; set; }}public class RootObject{public string message {get; set; }public string status {get; set; }public string date {get; set; }public string time {get; set; }public CityInfo cityInfo {get; set; }public Data data {get; set; }}
然后调用接口获取指定格式的数据
using (var client = new WebClient()){client.Encoding = Encoding.UTF8;string serviceAddress = "http://t./api/weather/city/"+ 101270101;var data = client.DownloadString(serviceAddress);RootObject datas = JsonConvert.DeserializeObject<RootObject>(data);Console.Write(datas.data.forecast[0].date);Console.ReadKey();}
然后就可以获取json里面的各种值;
Console.Write("更新时间是："+datas.time);Console.Write("现在所处位置是："+datas.cityInfo.city);foreach (var re in datas.data.forecast){Console.WriteLine("现在是" + re.ymd + " " + re.week);Console.WriteLine("最高温度" + re.high + "最低温度" + re.low);}
读取json文件获取里面的城市code：
public static string Readjson(string city_name){//读取自定目录下的json文件StreamReader sr = new StreamReader(@"F:*****.json");string json = sr.ReadToEnd();//json文件转为 对象 T 创建的类 字段名 应该和json文件中的保持一致var data = JsonConvert.DeserializeObject<RootObject>(json);foreach(var re in data.re){if(re.city_name.Contains(city_name)){return re.city_code;}}return null;}
城市文件的json类
public class Re{public string id {get; set; }public string pid {get; set; }public string city_code {get; set; }public string city_name {get; set; }public string post_code {get; set; }public string area_code {get; set; }public string ctime {get; set; }}public class RootObject{public List<Re> re {get; set; }}
城市json文件:
链接：/s/1oWnQVRebpGNN43Bde_gDHA
提取码：5slx
又知道了新方法
其实可以不用生成类 直接用dynamic强类型转化 超方便
在 NuGet里面引用jil，而且jil效率还贼快 当然还是转化成类后面使用方便些.
using (var client = new WebClient()){client.Encoding = Encoding.UTF8;string serviceAddress = "http://t./api/weather/city/" + 101270101;var data = client.DownloadString(serviceAddress);//RootObject datas = JsonConvert.DeserializeObject<RootObject>(data);var result = JSON.Deserialize<dynamic>(data);Console.Write("更新时间是：" + result.time);Console.Write("现在所处位置是：" + result.cityInfo.city);}
