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[英]How can I download all files from a ftp folder with c# winforms?
[英]How can I save files from ftp?
我有一个方法可以将文件夹结构从 ftp 复制到本地文件夹,然后复制其中包含的所有文件:
public void CreateDirectories()
{
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(Url);
request.Credentials = new NetworkCredential(Login, Pass);
request.Method = WebRequestMethods.Ftp.ListDirectory;
string soursePath = @"L:\Test";
StreamReader streamReader = new StreamReader(request.GetResponse().GetResponseStream());
string directoryName = streamReader.ReadLine();
while (directoryName != null)
{
//Create directories structure
if (directoryName.StartsWith("I") && !directoryName.Contains("p"))
{
string newPath = System.IO.Path.Combine(soursePath, directoryName);
if (!System.IO.Directory.Exists(newPath))
{
System.IO.Directory.CreateDirectory(newPath);
//get file list and invoke DownLoad(string directoryName, string fileName)
FtpWebRequest fileRequest = (FtpWebRequest)WebRequest.Create(Url + directoryName + "/");
fileRequest.Credentials = new NetworkCredential(Login, Pass);
fileRequest.Method = WebRequestMethods.Ftp.ListDirectory;
StreamReader fileStreamReader = new StreamReader(fileRequest.GetResponse().GetResponseStream());
string fileName = fileStreamReader.ReadLine();
while (fileName != null)
{
DownLoad(directoryName, fileName);
fileName = streamReader.ReadLine();
}
}
}
directoryName = streamReader.ReadLine();
}
request = null;
streamReader = null;
}
以及复制当前文件的方法:
public void DownLoad(string directoryName, string fileName)
{
string localPath = @"L:\Test\" + directoryName;
FtpWebRequest requestFileDownload = (FtpWebRequest)WebRequest.Create("ftp://ftp.equip.me/prod/" + directoryName + "/" + fileName);
requestFileDownload.Credentials = new NetworkCredential(Login, Pass);
requestFileDownload.Method = WebRequestMethods.Ftp.DownloadFile;
FtpWebResponse responseFileDownload = (FtpWebResponse)requestFileDownload.GetResponse();
Stream responseStream = responseFileDownload.GetResponseStream();
FileStream writeStream = new FileStream(localPath + "\\" + fileName, FileMode.Create);
int Length = 2048;
Byte[] buffer = new Byte[Length];
int bytesRead = responseStream.Read(buffer, 0, Length);
while (bytesRead > 0)
{
writeStream.Write(buffer, 0, bytesRead);
bytesRead = responseStream.Read(buffer, 0, Length);
}
responseStream.Close();
writeStream.Close();
requestFileDownload = null;
responseFileDownload = null;
}
但在线 Stream responseStream = responseFileDownload.GetResponseStream(); 它停止了近 40 秒,然后抛出超时异常,并且没有一个文件未被保存(文件很小 - 50 kb)
您应该尝试的第一件事是关闭被动模式,因为大多数防火墙会自动阻止它,但这是 ftpWebRequest 的默认操作模式。
就在这一行下方:
requestFileDownload.Method = WebRequestMethods.Ftp.DownloadFile;
还有这个:
requestFileDownload.UsePassive = false;
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