我请求微支付统一下单接口，报错。
错误：远程服务器返回错误: (404) 未找到。
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
我的代码：
string success_return = SendQingqiu.HttpPost("https://api.mch.weixin.qq.com/pay/unifiedorde", xml);
public static string HttpPost(string url, string data)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "POST";
request.ContentType = "text/xml";
//request.ContentType = "application/x-www-form-urlencoded";
//request.ContentLength = Encoding.UTF8.GetByteCount(data);
byte[] bytes = System.Text.Encoding.UTF8.GetBytes(data); // 编码形式按照个人需求来设置
request.ContentLength = bytes.Length;
Stream requestStream = request.GetRequestStream();
requestStream.Write(bytes, 0, bytes.Length);
requestStream.Close();
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();
return retString;
}
