标签:set http get C# request System json using public
C# WPF框架从http协议上获取返回的json数据及其解析json数据
在实际开发中,我们经常会使用到API,所谓API就是一个地址,我们称之为接口。然后我们通过使用C#对这个接口发送请求,服务器会接收我们的请求并返回数据,一般是XML或者json格式。
1.json数据格式
在接下来的实例中我将使用本地服务器进行演示。
接口:http://172.16.40.118:8666/getSInfraredData?dataTime=起始时间
TIPS:起始时间就是获取起始时间之后的数据信息。
格式如下:
2.获取返回的json数据
以下示例不对xmal界面进行过多的描述。新建login.xaml及其login.xaml.cs,仅用于演示。
login.xaml.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Net;//http接口命名空间
using System.IO;//输入输出流命名空间
namespace SmartShoppingSystem
{
/// <summary>
/// login.xaml 的交互逻辑
/// </summary>
///
public partial class login : Window
{
public login()
{
InitializeComponent();
WindowStartupLocation = WindowStartupLocation.CenterScreen;
}
private static String Api = "http://172.16.40.118:8666/getSInfraredData";
//封装的get方法
public static string Get(string Url)
{
//System.GC.Collect();
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
request.Proxy = null;
request.KeepAlive = false;
request.Method = "GET";
request.ContentType = "application/json; charset=UTF-8";
request.AutomaticDecompression = DecompressionMethods.GZip;
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream myResponseStream = response.GetResponseStream();
StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);
string retString = myStreamReader.ReadToEnd();
myStreamReader.Close();
myResponseStream.Close();
if (response != null)
{
response.Close();
}
if (request != null)
{
request.Abort();
}
return retString;
}
private void Login(object sender, RoutedEventArgs e)
{
string getData = Get(Api + "?dataTime=11:");
MessageBox.Show(getData)
}
}
}
以下是post方法,可借鉴。
//封装的post方法
public static string Post(string Url, string Data, string Referer)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
request.Method = "POST";
request.Referer = Referer;
byte[] bytes = Encoding.UTF8.GetBytes(Data);
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = bytes.Length;
Stream myResponseStream = request.GetRequestStream();
myResponseStream.Write(bytes, 0, bytes.Length);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader myStreamReader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
string retString = myStreamReader.ReadToEnd();
myStreamReader.Close();
myResponseStream.Close();
if (response != null)
{
response.Close();
}
if (request != null)
{
request.Abort();
}
return retString;
}
3.解析json数据(反序列化)
json数据字符串如下:
{"code":0,"result":[{"SInfraredId":1,"s1":1,"s2":1,"infrared1":15,"infrared2":18,"dataTime":"12:50:06"},{"SInfraredId":2,"s1":0,"s2":1,"infrared1":22,"infrared2":8,"dataTime":"11:02:47"},{"SInfraredId":3,"s1":1,"s2":0,"infrared1":2,"infrared2":58,"dataTime":"11:03:16"},{"SInfraredId":4,"s1":0,"s2":0,"infrared1":28,"infrared2":48,"dataTime":"11:03:39"},{"SInfraredId":5,"s1":1,"s2":1,"infrared1":8,"infrared2":8,"dataTime":"11:03:55"},{"SInfraredId":6,"s1":1,"s2":1,"infrared1":12,"infrared2":12,"dataTime":"12:58:42"}]}
1.首先我们需要将该字符串转化为一个C#中的实体类,用于存放数据。
通常有两种方案:
- 自己手写实体类。
- 利用网站进行直接转换或者直接百度搜索:JSON转C#实体类。
可以使用以下网站:http://www.bejson.com/convert/json2csharp/
public class ResultItem
{
/// <summary>
///
/// </summary>
public int SInfraredId { get; set; }
/// <summary>
///
/// </summary>
public int s1 { get; set; }
/// <summary>
///
/// </summary>
public int s2 { get; set; }
/// <summary>
///
/// </summary>
public int infrared1 { get; set; }
/// <summary>
///
/// </summary>
public int infrared2 { get; set; }
/// <summary>
///
/// </summary>
public string dataTime { get; set; }
}
public class Root
{
/// <summary>
///
/// </summary>
public int code { get; set; }
/// <summary>
///
/// </summary>
public List <ResultItem > result { get; set; }
}
2.引入Newtonsoft.Json.DLL文件
可以直接去该dll文件官方网站搜索:https://www.newtonsoft.com/json
或者直接使用博主提供的dll文件。链接:【点击跳转】
3.完整实例代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Net;//http接口命名空间
using System.IO;//输入输出流命名空间
using Newtonsoft.Json;//引入json解析命名空间
namespace SmartShoppingSystem
{
/// <summary>
/// login.xaml 的交互逻辑
/// </summary>
///
public partial class login : Window
{
public login()
{
InitializeComponent();
WindowStartupLocation = WindowStartupLocation.CenterScreen;
}
private static String Api = "http://172.16.40.118:8666/getSInfraredData";
public static string Get(string Url)
{
//System.GC.Collect();
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
request.Proxy = null;
request.KeepAlive = false;
request.Method = "GET";
request.ContentType = "application/json; charset=UTF-8";
request.AutomaticDecompression = DecompressionMethods.GZip;
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream myResponseStream = response.GetResponseStream();
StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);
string retString = myStreamReader.ReadToEnd();
myStreamReader.Close();
myResponseStream.Close();
if (response != null)
{
response.Close();
}
if (request != null)
{
request.Abort();
}
return retString;
}
//实体类
public class ResultItem
{
public int SInfraredId { get; set; }
public int s1 { get; set; }
public int s2 { get; set; }
public int infrared1 { get; set; }
public int infrared2 { get; set; }
public string dataTime { get; set; }
}
public class Root
{
public int code { get; set; }
public List <ResultItem > result { get; set; }
}
private void Login(object sender, RoutedEventArgs e)
{
string getData = Get(Api + "?dataTime=11:");
//解析json数据包
//传入实体类,解析json字符串。
Root rt = JsonConvert.DeserializeObject<Root>(getData);
MessageBox.Show(rt.code);
//由于这个JSON字符串的 public List<ResultItem > result 是一个集合,所以我们需要遍历集合里面的所有数据
for (int i = 0; i < rt.result.Count; i++)
{
MessageBox.Show("Data=" + rt.result[i].SInfraredId+ "\r\n" + rt.result[i].s1+ "\r\n" + rt.result[i].infrared1+ "\r\n" + rt.result[i].dataTime);
}
}
}
}
标签:set,http,get,C#,request,System,json,using,public 来源: https://blog.csdn.net/qq135595696/article/details/120621610
本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享; 2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关; 3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关; 4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除; 5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。