C# 基于OneNet 的物联网数据通信
本篇简介包含两部分：1、数据向OneNet平台的上传；2、数据从OneNet平台的下载。
1、数据向OneNet平台的上传
1.1 上传数据采用POST方式：
public void Post()
{
pictureBox1.BackColor = Color.Gray;
string url = "http://api.heclouds.com/devices/503683965/datapoints?";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "POST";
SetHeaderValue(request.Headers, "api-key", "dTOsflbiN1YGgUjIgNYjY3TBigw=");//设备API地址和 首部参数
request.Host = "api.heclouds.com";
request.ProtocolVersion = new Version(1, 1);
string Cod = "{\"datastreams\":[{\"id\":\"temperature\",\"datapoints\":[{\"value\":\"" + textBox4.Text + "\"}]},{\"id\":\"RH\",\"datapoints\":[{\"value\":\"" + textBox5.Text + "\"}]},{\"id\":\"state\",\"datapoints\":[{\"value\":\"" + textBox3.Text + "\"}]}]}";
byte[] data = Encoding.UTF8.GetBytes(Cod);
request.ContentLength = data.Length;
using (Stream reqStream = request.GetRequestStream())
{
reqStream.Write(data, 0, data.Length);
reqStream.Close();
}
HttpWebResponse resp = (HttpWebResponse)request.GetResponse();
Stream stream = resp.GetResponseStream();
//获取响应内容
using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
{
textBox6.Text = reader.ReadToEnd();
pictureBox1.BackColor = Color.Lime;
}
// return result;
}//面向OneNet的发送
1.2 HTTP协议报文头编辑函数
public static void SetHeaderValue(WebHeaderCollection header, string name, string value)// HTTP协议报文头加入
{
var property = typeof(WebHeaderCollection).GetProperty("InnerCollection", BindingFlags.Instance | BindingFlags.NonPublic);
if (property != null)
{
var collection = property.GetValue(header, null) as NameValueCollection;
collection[name] = value;
}
}
2、数据从OneNet平台的下载
2.1 数据获取采用Get模式
private void Get(object sender, EventArgs e)//连接服务器并获取数据
{
string url = "http://api.heclouds.com/devices/503683965/datapoints?";//设备地址
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "GET";
SetHeaderValue(request.Headers, "api-key", "dTOsflbiN1YGgUjIgNYjY3TBigw=");//设备API地址和 首部参数
request.Host = "api.heclouds.com";
request.ProtocolVersion = new Version(1, 1);
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"));
string retString = myStreamReader.ReadToEnd();
myStreamReader.Close();
myResponseStream.Close();
textBox5.Text = retString;
}
2.2 HTTP协议报文头编辑
public static void SetHeaderValue(WebHeaderCollection header, string name, string value)// HTTP协议报文头加入
{
var property = typeof(WebHeaderCollection).GetProperty("InnerCollection", BindingFlags.Instance | BindingFlags.NonPublic);
if (property != null)
{
var collection = property.GetValue(header, null) as NameValueCollection;
collection[name] = value;
}
}
之前自己做的一个小程序，可以参考：https://download.csdn.net/download/lnwin521/10808227
