C#通过发送 http 请求调用接口之Post

1.实现车辆审核回调接口（包含车辆基本信息数据)

（1）描述

本接口提供运政车辆基本信息回传服务，调用方式请使用 post 方式提交。

（2）接口调用示例：

待加密格式

type=xxx&user=xxx&pwd=x&vclN=xxx&pltClr=xx&vclClr=xx&area=xx&hsHld=xx...

（3）请求地址格式
http://xxx/vinfos?p=加密后数据
（4）实现：

void btnTransferVehicleAudit_Click(object sender, EventArgs e)
{
DateTime dt = Convert.ToDateTime("2014-01-09 16:47:24");
long dtNow = ConvertDateTimeToInt(DateTime.Now);
long dtSpanTime = ConvertDateTimeToInt(dt);

StringBuilder sb = new StringBuilder();
sb.Append("type=xxx&user=xxx&pwd=0&vclN=xxx&pltClr=2&vclClr=2&area=xx&hsHld=xx&vclCt=xx");
sb.Append("&vclBsTp=xx&vclTps=xx&vclUsTp=xx&vclLng=xx&vclWdt=xx&vclHgt=xx&boxLng=xx&boxWdt=xx&boxHgt=xx");
sb.Append("&boxCnt=xx&lftHgt=xx&twoTstStrd=xx®LicN=xx&drvLicBgDt=xx&drvLicBrd=xx&vin=xx&vclOrg=xx&rdTrans=xx&opStt=xx"); ....

string strEn = Encrypt.Security.EnCode(sb.ToString());//加密
string url = "http://114.242.194.231:8084/BasisInfoInterface/vinfos";

Stream outstream = null;
Stream instream = null;
StreamReader sr = null;
HttpWebResponse response = null;
HttpWebRequest request = null;
Encoding encoding = System.Text.Encoding.GetEncoding("gb2312");

byte[] data = encoding.GetBytes("p=" + strEn);
// 准备请求...
try
{
// 设置参数
request = WebRequest.Create(url) as HttpWebRequest;
CookieContainer cookieContainer = new CookieContainer();
request.CookieContainer = cookieContainer;
request.AllowAutoRedirect = true;
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = data.Length;
outstream = request.GetRequestStream();
outstream.Write(data, 0, data.Length);
outstream.Close();
//发送请求并获取相应回应数据
response = request.GetResponse() as HttpWebResponse;
//直到request.GetResponse()程序才开始向目标网页发送Post请求
instream = response.GetResponseStream();
sr = new StreamReader(instream, encoding);
//返回结果网页（html）代码
string content = sr.ReadToEnd();
//处理返回值
string quReply = Encrypt.Security.DeCode(content); //解密
string jsona = @quReply;
JavaScriptSerializer jscvt = new JavaScriptSerializer();
//将jsona字符串转变成指定类型对象
TransferResult objQuery = jscvt.Deserialize<TransferResult>(jsona);

switch (objQuery.code)
{
case "10000": ShowErrorMessage("添加成功2"); break;
case "10001": ShowErrorMessage("添加失败"); return;
case "20001": ShowErrorMessage("用户名或者密码错误"); return;
case "30001": ShowErrorMessage("参数为空"); return;
case "90001": ShowErrorMessage("其它异常"); return;
case "90002": ShowErrorMessage("系统异常"); return;
}
}
catch (Exception ex)
{
string err = ex.Message;
}
}