/// <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");        }    }}