HTML构建空气质量实时获取代码,基于C#的空气质量实时监测接口调用代码实例
代碼描述：基于C#的空氣質量實時監測接口調用代碼實例
關聯數據：空氣質量
接口地址：http://www.juhe.cn/docs/api/id/33
1.[代碼][C#]代碼
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using Xfrog.Net;
using System.Diagnostics;
using System.Web;
//----------------------------------
// 空氣質量調用示例代碼 － 聚合數據
// 在線接口文檔：http://www.juhe.cn/docs/33
// 代碼中JsonObject類下載地址:http://download.csdn.net/download/gcm3206021155665/7458439
//----------------------------------
namespace ConsoleAPI
{
class Program
{
static void Main(string[] args)
{
string appkey = "*******************"; //配置您申請的appkey
//1.城市空氣質量
string url1 = "http://web.juhe.cn:8080/environment/air/cityair";
var parameters1 = new Dictionary();
parameters1.Add("city" , ""); //城市名稱的中文名稱或拼音，如：上海 或 shanghai
parameters1.Add("key", appkey);//你申請的key
string result1 = sendPost(url1, parameters1, "get");
JsonObject newObj1 = new JsonObject(result1);
String errorCode1 = newObj1["error_code"].Value;
if (errorCode1 == "0")
{
Debug.WriteLine("成功");
Debug.WriteLine(newObj1);
}
else
{
//Debug.WriteLine("失敗");
Debug.WriteLine(newObj1["error_code"].Value+":"+newObj1["reason"].Value);
}
//2.城市空氣PM2.5指數
string url2 = "http://web.juhe.cn:8080/environment/air/pm";
var parameters2 = new Dictionary();
parameters2.Add("city" , ""); //城市名稱的中文名稱或拼音，如：上海 或 shanghai
parameters2.Add("key", appkey);//你申請的key
string result2 = sendPost(url2, parameters2, "get");
JsonObject newObj2 = new JsonObject(result2);
String errorCode2 = newObj2["error_code"].Value;
if (errorCode2 == "0")
{
Debug.WriteLine("成功");
Debug.WriteLine(newObj2);
}
else
{
//Debug.WriteLine("失敗");
Debug.WriteLine(newObj2["error_code"].Value+":"+newObj2["reason"].Value);
}
//3.城市空氣質量-城市列表
string url3 = "http://web.juhe.cn:8080/environment/air/airCities";
var parameters3 = new Dictionary();
parameters3.Add("key", appkey);//你申請的key
string result3 = sendPost(url3, parameters3, "get");
JsonObject newObj3 = new JsonObject(result3);
String errorCode3 = newObj3["error_code"].Value;
if (errorCode3 == "0")
{
Debug.WriteLine("成功");
Debug.WriteLine(newObj3);
}
else
{
//Debug.WriteLine("失敗");
Debug.WriteLine(newObj3["error_code"].Value+":"+newObj3["reason"].Value);
}
//4.城市空氣PM2.5指數-城市列表
string url4 = "http://web.juhe.cn:8080/environment/air/pmCities";
var parameters4 = new Dictionary();
parameters4.Add("key", appkey);//你申請的key
string result4 = sendPost(url4, parameters4, "get");
JsonObject newObj4 = new JsonObject(result4);
String errorCode4 = newObj4["error_code"].Value;
if (errorCode4 == "0")
{
Debug.WriteLine("成功");
Debug.WriteLine(newObj4);
}
else
{
//Debug.WriteLine("失敗");
Debug.WriteLine(newObj4["error_code"].Value+":"+newObj4["reason"].Value);
}
//5.城市輻射指數
string url5 = "http://web.juhe.cn:8080/environment/air/radia";
var parameters5 = new Dictionary();
parameters5.Add("city" , ""); //城市名稱的中文拼音，查詢城市為“上海”，則輸入：上海
parameters5.Add("num" , ""); //查詢頁碼數，不寫默認為第一頁。
parameters5.Add("key", appkey);//你申請的key
string result5 = sendPost(url5, parameters5, "get");
JsonObject newObj5 = new JsonObject(result5);
String errorCode5 = newObj5["error_code"].Value;
if (errorCode5 == "0")
{
Debug.WriteLine("成功");
Debug.WriteLine(newObj5);
}
else
{
//Debug.WriteLine("失敗");
Debug.WriteLine(newObj5["error_code"].Value+":"+newObj5["reason"].Value);
}
}
///
/// Http (GET/POST)
///
/// 請求URL
/// 請求參數
/// 請求方法
/// 響應內容
static string sendPost(string url, IDictionary parameters, string method)
{
if (method.ToLower() == "post")
{
HttpWebRequest req = null;
HttpWebResponse rsp = null;
System.IO.Stream reqStream = null;
try
{
req = (HttpWebRequest)WebRequest.Create(url);
req.Method = method;
req.KeepAlive = false;
req.ProtocolVersion = HttpVersion.Version10;
req.Timeout = 5000;
req.ContentType = "application/x-www-form-urlencoded;charset=utf-8";
byte[] postData = Encoding.UTF8.GetBytes(BuildQuery(parameters, "utf8"));
reqStream = req.GetRequestStream();
reqStream.Write(postData, 0, postData.Length);
rsp = (HttpWebResponse)req.GetResponse();
Encoding encoding = Encoding.GetEncoding(rsp.CharacterSet);
return GetResponseAsString(rsp, encoding);
}
catch (Exception ex)
{
return ex.Message;
}
finally
{
if (reqStream != null) reqStream.Close();
if (rsp != null) rsp.Close();
}
}
else
{
//創建請求
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url + "?" + BuildQuery(parameters, "utf8"));
//GET請求
request.Method = "GET";
request.ReadWriteTimeout = 5000;
request.ContentType = "text/html;charset=UTF-8";
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream myResponseStream = response.GetResponseStream();
StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
//返回內容
string retString = myStreamReader.ReadToEnd();
return retString;
}
}
///
/// 組裝普通文本請求參數。
///
/// Key-Value形式請求參數字典
/// URL編碼后的請求數據
static string BuildQuery(IDictionary parameters, string encode)
{
StringBuilder postData = new StringBuilder();
bool hasParam = false;
IEnumerator> dem = parameters.GetEnumerator();
while (dem.MoveNext())
{
string name = dem.Current.Key;
string value = dem.Current.Value;
// 忽略參數名或參數值為空的參數
if (!string.IsNullOrEmpty(name))//&& !string.IsNullOrEmpty(value)
{
if (hasParam)
{
postData.Append("&");
}
postData.Append(name);
postData.Append("=");
if (encode == "gb2312")
{
postData.Append(HttpUtility.UrlEncode(value, Encoding.GetEncoding("gb2312")));
}
else if (encode == "utf8")
{
postData.Append(HttpUtility.UrlEncode(value, Encoding.UTF8));
}
else
{
postData.Append(value);
}
hasParam = true;
}
}
return postData.ToString();
}
///
/// 把響應流轉換為文本。
///
/// 響應流對象
/// 編碼方式
/// 響應文本
static string GetResponseAsString(HttpWebResponse rsp, Encoding encoding)
{
System.IO.Stream stream = null;
StreamReader reader = null;
try
{
// 以字符流的方式讀取HTTP響應
stream = rsp.GetResponseStream();
reader = new StreamReader(stream, encoding);
return reader.ReadToEnd();
}
finally
{
// 釋放資源
if (reader != null) reader.Close();
if (stream != null) stream.Close();
if (rsp != null) rsp.Close();
}
}
}
}
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