C# 使用HttpWebRequest通过PHP接口 上传文件

1：上传文件实例

 public void UploadXMLLog(string xmlpath)         {             NameValueCollection nvc = new NameValueCollection();             CookieContainer cookies = new CookieContainer();             nvc.Add("", “”);             ......             string url = "UrlPath";             string res = UploadFile(xmlpath, url, nvc, cookies);         } public void UploadXM