ftp上传太大了

我在C＃中编写了一个函数，用于在复制到文件共享时无法上传文件。 我注意到任何上传的文件大小都是原始文件的1.5-2倍，并且是无效文件。 这是代码：

public bool save_FTPUpload(FileInfo fi_attachment) { bool fileSaved = false; string filename = fi_attachment.Name; while (!fileSaved) { string file_ftpURI = string.Format("{0}/{1}", ftpURI, filename); FtpWebRequest file_exist_request = (FtpWebRequest)FtpWebRequest.Create(file_ftpURI); file_exist_request.Credentials = new NetworkCredential(ftp_user, ftp_pass); file_exist_request.Method = WebRequestMethods.Ftp.GetFileSize; try { FtpWebResponse response = (FtpWebResponse)file_exist_request.GetResponse(); } catch (WebException ex) { FtpWebResponse response = (FtpWebResponse)ex.Response; if (response.StatusCode == FtpStatusCode.ActionNotTakenFileUnavailable) { FtpWebRequest upload_request = (FtpWebRequest)FtpWebRequest.Create(file_ftpURI); upload_request.Credentials = new NetworkCredential(ftp_user, ftp_pass); upload_request.Method = WebRequestMethods.Ftp.UploadFile; upload_request.UsePassive = true; upload_request.UseBinary = true; upload_request.KeepAlive = false; StreamReader attachment = new StreamReader(fi_attachment.FullName); byte[] attachmentData = Encoding.UTF8.GetBytes(attachment.ReadToEnd()); upload_request.ContentLength = attachmentData.Length; //Stream upload_request_stream = upload_request.GetRequestStream(); using (Stream upload_request_stream = upload_request.GetRequestStream()) { upload_request_stream.Write(attachmentData, 0, attachmentData.Length); upload_request_stream.Close(); } FtpWebResponse upload_response = (FtpWebResponse)upload_request.GetResponse(); fileSaved = true; } } } return fileSaved; } 

任何帮助解决这个问题都会很棒。

Answer 1

您需要以二进制模式复制文件的内容，如下所示：

 var response = (FtpWebResponse)ex.Response; if (response.StatusCode == FtpStatusCode.ActionNotTakenFileUnavailable) { FtpWebRequest upload_request = (FtpWebRequest)FtpWebRequest.Create(file_ftpURI); upload_request.Credentials = new NetworkCredential(ftp_user, ftp_pass); upload_request.Method = WebRequestMethods.Ftp.UploadFile; upload_request.UsePassive = true; upload_request.UseBinary = true; upload_request.KeepAlive = false; var attachment = File.Open(fi_attachment.FullName, FileMode.Open); using (Stream upload_request_stream = upload_request.GetRequestStream()) { attachment.CopyTo(upload_request_stream); upload_request_stream.Close(); } var upload_response = (FtpWebResponse)upload_request.GetResponse(); fileSaved = true; } 

您当前的程序将其读作UTF-8编码中的一个非常长的字符串，这可能是文件大小变化的原因。

Answer 2

为什么所有这些舞蹈解码文件然后重新编码呢？ 你有两个流吗？ 您希望服务器上存在磁盘上的相同文件吗？ Stream.CopyTo将更不容易出错。

你可以替换

  StreamReader attachment = new StreamReader(fi_attachment.FullName); byte[] attachmentData = Encoding.UTF8.GetBytes(attachment.ReadToEnd()); upload_request.ContentLength = attachmentData.Length; //Stream upload_request_stream = upload_request.GetRequestStream(); using (Stream upload_request_stream = upload_request.GetRequestStream()) { upload_request_stream.Write(attachmentData, 0, attachmentData.Length); upload_request_stream.Close(); } 

（在我的头顶）

 using (var fs = File.OpenRead(fi_attachment.FullName)) using (Stream upload_request_stream = upload_request.GetRequestStream()) { fs.CopyTo(upload_request_stream); }