ajax 上传 demo

string result = "N";

        if (Request.QueryString["FILENAME"] != null)

        {

            try

            {

                string fileName = Server.UrlDecode(Request.QueryString["FILENAME"]).Substring(Request.QueryString["FILENAME"].LastIndexOf("."));



                StringBuilder newFileName = new StringBuilder(DateTime.Now.ToString("yyyyMMddhhss")).Append(fileName);



                WebClient webClient = new WebClient();



                webClient.Credentials = CredentialCache.DefaultCredentials;



                FileStream fs = new FileStream(Server.UrlDecode(Request.QueryString["FILENAME"]), FileMode.Open, FileAccess.Read);



                BinaryReader br = new BinaryReader(fs);



                byte[] postArray = br.ReadBytes(Convert.ToInt32(fs.Length));



                string temp = Server.MapPath(@"~/images/") + newFileName;

                Stream postStream = webClient.OpenWrite(temp, "PUT");





                if (postStream.CanWrite)

                {

                    postStream.Write(postArray, 0, postArray.Length);

                    result = "Y";

                }

            }

            catch

            {

            }

            finally

            {

                Response.Write(result);

            }