发送文件

来源：互联网发布：mac无法拷贝文件到u盘编辑：程序博客网时间：2024/06/11 02:32
string PostData(HttpPostedFile postedFile, string url)        {            try            {                WebRequest req = WebRequest.Create(url);                req.Method = "POST";                String boundary = "---------------------------7d4a6d158c9"; // 分隔符                 StringBuilder sb = new StringBuilder();                // 发送每个字段:                 //sb = sb.Append("--");                //sb = sb.Append(boundary);                //sb = sb.Append("\r\n");                //sb = sb.Append("Content-Disposition: form-data; name=\"MailIDs\"\r\n\r\n");                //sb = sb.Append(Server.UrlEncode("1111111111"));                //sb = sb.Append("\r\n");                // 发送文件:                 sb = sb.Append("--");                sb = sb.Append(boundary);                sb = sb.Append("\r\n");                sb = sb.Append("Content-Disposition: form-data; name=\"" + Server.UrlEncode(Path.GetFileNameWithoutExtension(postedFile.FileName))                     + "\"; filename=\"" + Server.UrlEncode(postedFile.FileName) + "\"\r\n");                sb = sb.Append("Content-Type: application/octet-stream\r\n\r\n");                byte[] data = Encoding.UTF8.GetBytes(sb.ToString());                byte[] end_data = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");                 req.ContentType = "multipart/form-data; boundary=" + boundary;                // Encode the data                byte[] encodedBytes = new byte[postedFile.InputStream.Length];                req.ContentLength = data.Length + encodedBytes.Length + end_data.Length;                postedFile.InputStream.Read(encodedBytes, 0, encodedBytes.Length);                // Write encoded data into request stream                using (Stream requestStream = req.GetRequestStream())                {                    requestStream.Write(data, 0, data.Length);                    requestStream.Write(encodedBytes, 0, encodedBytes.Length);                    requestStream.Write(end_data, 0, end_data.Length);                    requestStream.Close();                    using (WebResponse res = req.GetResponse())                    {                        using (Stream receiveStream = res.GetResponseStream())                        {                            StreamReader sr = new StreamReader(receiveStream);                            return sr.ReadToEnd();                        }                    }                }            }            catch (Exception ex)            {                ErrorLog.WriteErrorLog("URL:" + url + ex.ToString());                return "";            }        }
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