当复制到文件共享不起作用时,我已经用C#编写了一个上传文件的功能。我注意到任何上传的文件的大小约为原始文件的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;
}
解决这个问题的任何帮助都将是巨大的。
最佳答案
您需要以二进制方式复制文件的内容,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取为UTF-8编码的非常长的字符串,这很可能说明了文件大小的变化。
关于c# - ftp上传太大,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/8495064/