(HttpWebRequest模拟请求登录):当一些硬件设备接口 或需要调用其他地方的接口时，模拟请求登录获取接口的数据就很有必要。
webclient类:只想从特定的URI请求文件，则使用WebClient;
1.创建带Cookie的webclient：
/// <summary>
/// 带 Cookie 的 WebClient
/// </summary>
public class CookieWebClient : WebClient
{
// Cookie 容器
public CookieContainer Cookies; /// <summary>
/// 创建一个新的 CookieWebClient 实例。
/// </summary>
public CookieWebClient()
{
this.Cookies = new CookieContainer();
} protected override WebRequest GetWebRequest(Uri address)
{
WebRequest request = base.GetWebRequest(address);
if (request is HttpWebRequest)
{
HttpWebRequest httpRequest = request as HttpWebRequest;
httpRequest.CookieContainer = Cookies;
}
return request;
}
}
2.http方法（Get、POST）:
public CookieContainer cookies;
internal string HttpGet(string Url)
{
string result = "";
using (var client = new CookieWebClient())
{
client.Encoding = Encoding.UTF8;
client.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded,charset=UTF-8";
client.Cookie = cookies;
byte[] data = client.DownloadData(Url);
result = Encoding.UTF8.GetString(data);
}
return result;
}
internal string HttpPost(string Url, string postDataStr)
{
string result = "";
using (var client = new CookieWebClient())
{
client.Encoding = Encoding.UTF8;
client.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded; charset=UTF-8";
byte[] post = Encoding.UTF8.GetBytes(postDataStr);
byte[] data = client.UploadData(Url,post);
result = Encoding.UTF8.GetString(data);
cookies = client.Cookie;
}
return result;
}
3. controller
[HttpGet]
public string Getinfo(string name, string pwd)
{
string hg = "";
string url = "http://111.38.56.130:8084/LoginHandler.ashx?time=" + DateTime.Now;
string loginp = "action=Login&flag=1&name={0}&pwd={1}&isRemember=false";
string urlget = "http://111.38.56.130:8084/Company/IndexHandler.ashx?time={0}&action=deviceShowData&greenHouseSerialNum=00000F003G001";
string param = string.Format(loginp, name, pwd);
exta.http h = new exta.http();
string r = h.HttpPost(url, param);
if (r.Equals(""))
{
hg = h.HttpGet(string.Format(urlget, DateTime.Now));
}
return hg;
}