/// <summary> /// Http上传文件 /// </summary> public static string HttpUploadFile(string url, string path) {     // 设置参数     HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;     CookieContainer cookieContainer = new CookieContainer();     request.CookieContainer = cookieContainer;     request.AllowAutoRedirect = true;     request.Method = "POST";     string boundary = DateTime.Now.Ticks.ToString("X"); // 随机分隔线     request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;     byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");     byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");     int pos = path.LastIndexOf("\\");     string fileName = path.Substring(pos + 1);     //请求头部信息     StringBuilder sbHeader = new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileName));     byte[] postHeaderBytes = Encoding.UTF8.GetBytes(sbHeader.ToString());     FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);     byte[] bArr = new byte[fs.Length];     fs.Read(bArr, 0, bArr.Length);     fs.Close();     Stream postStream = request.GetRequestStream();     postStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);     postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);     postStream.Write(bArr, 0, bArr.Length);     postStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);     postStream.Close();     //发送请求并获取相应回应数据     HttpWebResponse response = request.GetResponse() as HttpWebResponse;     //直到request.GetResponse()程序才开始向目标网页发送Post请求     Stream instream = response.GetResponseStream();     StreamReader sr = new StreamReader(instream, Encoding.UTF8);     //返回结果网页（html）代码     string content = sr.ReadToEnd();     return content; }

using System; using System.Web; namespace SWX {     public partial class test2 : System.Web.UI.Page     {         protected void Page_Load(object sender, EventArgs e)         {             HttpPostedFile file = Request.Files[0];             file.SaveAs(MapPath("\\UploadFile\\" + file.FileName));             Response.Write("Success\r\n");         }     } }