我编写了一个程序,它从远程 ftp 站点下载文件并将其保存到本地 c 驱动器,然后将该文件上传到单独的服务器。现在的问题是,当文件被下载时,它在本地 C 上创建的文本文件中没有数据,我不知道为什么会这样。这是我正在使用的代码
// Download File
public void download(string remoteFile, string localFile)
{
try
{
// Create an FTP Request
ftpRequest = (FtpWebRequest)FtpWebRequest.Create(downhost + "/" + remoteFile);
// Log in to the FTP Server with the User Name and Password Provided
ftpRequest.Credentials = new NetworkCredential(downuser, downpass);
// When in doubt, use these options
ftpRequest.UseBinary = true;
ftpRequest.UsePassive = true;
ftpRequest.KeepAlive = true;
/* Set HTTP Proxy to Null to avoid The Requested FTP Command Is Not Supported When Using HTTP Proxy error */
ftpRequest.Proxy = null;
// Specify the Type of FTP Request
ftpRequest.Method = WebRequestMethods.Ftp.DownloadFile;
// Establish Return Communication with the FTP Server
ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
// Get the FTP Server's Response Stream
ftpStream = ftpResponse.GetResponseStream();
// Open a File Stream to Write the Downloaded File
FileStream localFileStream = new FileStream(localFile, FileMode.Create);
// Buffer for the Downloaded Data
byte[] byteBuffer = new byte[bufferSize];
int bytesRead = ftpStream.Read(byteBuffer, 0, bufferSize);
// Download the File by Writing the Buffered Data Until the Transfer is Complete
try
{
while (bytesRead > 0)
{
localFileStream.Write(byteBuffer, 0, bytesRead);
bytesRead = ftpStream.Read(byteBuffer, 0, bufferSize);
}
}
catch (Exception ex) { Console.WriteLine(ex.ToString()); }
// Resource Cleanup
localFileStream.Close();
ftpStream.Close();
ftpResponse.Close();
ftpRequest = null;
}
catch (Exception ex) { Console.WriteLine(ex.ToString()); }
return;
}
我使用在http://www.codeproject.com/Tips/443588/Simple-Csharp-FTP-Class找到的代码作为构建我的程序的基础,并且我已经完成了谷歌搜索其他人是如何编写他们的ftp 下载脚本,但无法找出未写入数据的任何原因。
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