我找到了一个Windows命令行代码片段,用于从IBM Z / OS主机下载文件,现在我想使用C#和.NET复制此代码。以下是两个Windows命令行文件:
BatchFtp.bat:
rem 999.999.99.99 is mainframe IP Address
ftp -s:C:\scripts\script.txt 999.999.99.99
pause
C:\脚本\ script.txt:
myid
MyPwd
cd ..
get "GIO.END.GPROD.PROC(MYDSNAME)" "c:\scripts\GIO.END.GPROD.PROC(MYDSNAME).txt"
quit
我尝试了几个C#FTP开源示例,包括以下内容,但我发现所有这些都有错误。
例如,执行以下代码时,出现错误
远程服务器返回错误:(425)无法打开数据连接。
执行此行时:
ftpStream = ftpResponse.GetResponseStream();
这是我执行的代码:
private void button1_Click(object sender, EventArgs e)
{
/* Download a File */
Ftp ftpClient = new Ftp("999.999.99.99", "MyUserIdHere", "MypasswordHere");
ftpClient.download(@"GIO.END.GPROD.PROC(DsNmHere)", @"'c:\junk\GIO.END.GPROD.PROC(DsNmHere).txt'");
}
class Ftp
{
private string host = null;
private string user = null;
private string pass = null;
private FtpWebRequest ftpRequest = null;
private FtpWebResponse ftpResponse = null;
private Stream ftpStream = null;
private int bufferSize = 2048;
/* Construct Object */
public Ftp(string hostIP, string userName, string password)
{
host = hostIP;
user = userName;
pass = password;
}
/* Download File */
public void download(string remoteFile, string localFile)
{
try
{
/* Create an FTP Request */
string fullPath = @"ftp://" + this.host + "/'" + remoteFile + "'";
ftpRequest = (FtpWebRequest) FtpWebRequest.Create(fullPath);
/* Log in to the FTP Server with the User Name and Password Provided */
ftpRequest.Credentials = new NetworkCredential(user, pass);
/* When in doubt, use these options */
ftpRequest.UseBinary = false;
ftpRequest.UsePassive = true;
ftpRequest.KeepAlive = true;
/* 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)
{
System.Windows.Forms.MessageBox.Show(ex.Message);
Console.WriteLine(ex.ToString());
}
return;
}
}
我假设我的网址必须构造错误。连接后,如何处理工作批处理文件示例中的cd
(更改目录)命令?
我将不胜感激任何建议。感谢。
答案 0 :(得分:2)
您的ftp.exe
脚本使用活动FTP模式。 (ftp.exe
仅支持活动模式。)
虽然您的C#代码使用被动FTP模式。并且它有一些问题,因为“无法打开数据连接”消息表明。
通过删除此行尝试使用活动模式:
ftpRequest.UsePassive = true;
虽然注意到一般情况下被动模式往往不那么成问题。见my guide to understand why the passive mode prevails nowadays。但是当你证明主动模式适用于你的情况时,坚持下去。
要回答您的其他问题:无法使用cd
发出FtpWebRequest
命令。只需使用完整路径:
ftp://host/../remotefile
../
代替cd ..
有关使用FtpWebRequest
针对IBM大型机FTP服务器的路径的一般信息,请参阅:
Use C# to FTP file to mainframe including dataset - Translate FTP script to FtpWebRequest code