文件流与内存流存储

1.文件流放入指定路径

//string retString = "";            

                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                request.Method = "POST";
                request.ContentType = contentType;
                request.Accept = "*/*";
                request.Headers.Add("SERVICE-AUTHENTICATION", authorization);
                byte[] bt = Encoding.UTF8.GetBytes(param);
                string responseData = String.Empty;
                request.ContentLength = bt.Length;
                using (Stream reqStream = request.GetRequestStream())
                {
                    reqStream.Write(bt, 0, bt.Length);
                    reqStream.Close();
                }
                using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
                {
                    using (Stream steam = response.GetResponseStream())
                    {
                        string path = HttpContext.Current.Server.MapPath("/")+"Temp\";

                       string fileName = "名称" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".pdf";//客户端保存的文件名
                        filePath = path + "\" + fileName;//路径
                        if (!Directory.Exists(path))
                        {
                            Directory.CreateDirectory(path);
                        }
                        using (FileStream fileStream = new FileStream(filePath, FileMode.Create, FileAccess.Write))
                        {
                            int size = 2048;
                            byte[] data = new byte[response.ContentLength];
                            while (true)
                            {
                                size = steam.Read(data, 0, data.Length);
                                if (size > 0)
                                {
                                    fileStream.Write(data, 0, size);
                                }
                                else
                                {
                                    break;
                                }
                            }
                        }
                    }
                }
                
          

2.内存流将文件放入本地路径

      
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                request.Method = "POST";
                request.ContentType = contentType;
                request.Headers.Add("SERVICE-AUTHENTICATION", authorization);
                byte[] bt = Encoding.UTF8.GetBytes(param);
                string responseData = String.Empty;
                request.ContentLength = bt.Length;
                request.UserAgent = "Code Sample Web Client";
                using (Stream reqStream = request.GetRequestStream())
                {
                    reqStream.Write(bt, 0, bt.Length);
                    reqStream.Close();
                }
                using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
                {

                    byte[] data;
                    using (var mstrm = new MemoryStream())
                    {
                        using (var s = response.GetResponseStream())
                        {
                            var tempBuffer = new byte[4096];
                            int bytesRead;
                            while ((bytesRead = s.Read(tempBuffer, 0, tempBuffer.Length)) != 0)
                            {
                                mstrm.Write(tempBuffer, 0, bytesRead);
                            }
                        }
                        mstrm.Flush();
                        data = mstrm.GetBuffer();
                    }

                    MemoryStream memorystream = new MemoryStream(data);
                    using (Stream steam = memorystream)
                    {

                        string path = HttpContext.Current.Server.MapPath(" / ") + "Temp\";
                        string fileName = "名称" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".pdf";//客户端保存的文件名
                        filePath = path + "\" + fileName;//路径
                        if (!Directory.Exists(path))
                        {
                            Directory.CreateDirectory(path);
                        }
                        using (FileStream fileStream = new FileStream(filePath, FileMode.Create, FileAccess.Write))
                        {
                            int size = 2048;

                            while (true)
                            {
                                size = steam.Read(data, 0, data.Length);
                                if (size > 0)
                                {
                                    fileStream.Write(data, 0, size);
                                }
                                else
                                {
                                    break;
                                }
                            }
                        }
                    }
                }