问题描述
错误消息是:此FTP命令的请求URL无效
错误消息是:远程服务器记录了错误(550)文件不可用(例如，文件未找到，无法访问).
这里的代码:
使用系统；
使用System.Collections.Generic;
使用System.ComponentModel;
使用System.Data;
使用System.Drawing;
使用System.Linq;
使用System.Text;
使用System.Windows.Forms;
使用System.Net;
使用System.IO;
命名空间WindowsFormsApplication1
{
公共局部类Form1:Form
{
公用字符串ftpServerIP;
公用字符串ftpUserID;
公用字符串ftpPassword;
公共字符串remoteDir;
公共字符串localDestnDir;
公共Form1()
{
InitializeComponent();
}
private void button1_Click(对象发送者，EventArgs e)
{
ftpServerIP ="xxxx";
ftpUserID ="xxxxxx";
ftpPassword ="xxx";
remoteDir ="Test1";
localDestnDir ="C:\\";
字符串[]文件= GetFileList();
foreach(文件中的字符串文件)
{
下载(文件)；
}
}
公共字符串[] GetFileList()
{
字符串[] downloadFiles;
StringBuilder结果=新的StringBuilder();
Web响应响应= null；
StreamReader reader = null;
试试
{
FtpWebRequest reqFTP;
reqFTP =(FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP +"/"));
reqFTP.UseBinary = true;
reqFTP.Credentials =新的NetworkCredential(ftpUserID，ftpPassword);
reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
reqFTP.Proxy = null;
reqFTP.KeepAlive = false;
reqFTP.UsePassive = false;
响应= reqFTP.GetResponse();
reader = new StreamReader(response.GetResponseStream());
字符串行= reader.ReadLine();
而(行！= null)
{
result.Append(line);
result.Append("\ n");
行= reader.ReadLine();
}
//删除结尾的"\ n"
result.Remove(result.ToString().LastIndexOf(''\ n'')，1);
返回result.ToString().Split(''\ n'');
}
catch(ex ex例外)
{
如果(读者！= null)
{
reader.Close();
}
如果(响应！=空)
{
response.Close();
}
downloadFiles = null;
返回downloadFiles;
}
}
私人void下载(字符串文件)
{
试试
{
字符串uri ="ftp://" + ftpServerIP +"/" + remoteDir +"/" +文件；
Uri serverUri =新的Uri(uri);
如果(serverUri.Scheme！= Uri.UriSchemeFtp)
{
返回；
}
FtpWebRequest reqFTP;
reqFTP =(FtpWebRequest)FtpWebRequest.Create(新的Uri("ftp://" + ftpServerIP +"/" + remoteDir +"/" +文件));
reqFTP.Credentials =新的NetworkCredential(ftpUserID，ftpPassword);
reqFTP.KeepAlive = false;
reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
reqFTP.UseBinary = true;
reqFTP.Proxy = null;
reqFTP.UsePassive = false;
FtpWebResponse响应=(FtpWebResponse)reqFTP.GetResponse();
流responseStream = response.GetResponseStream();
FileStream writeStream =新的FileStream(localDestnDir +"/" +文件，FileMode.Create);
int长度= 2048;
Byte []缓冲区=新的Byte [Length];
int bytesRead = responseStream.Read(buffer，0，Length);
while(bytesRead> 0)
{
writeStream.Write(buffer，0，bytesRead);
bytesRead = responseStream.Read(buffer，0，Length);
}
writeStream.Close();
response.Close();
}
捕获(WebException wEx)
{
MessageBox.Show(wEx.Message，下载错误");
}
catch(ex ex例外)
{
MessageBox.Show(例如消息，下载错误")；
}
}
}
}
Error msg is:The request URL is invalid this FTP command
Error msg is:the remote server returen an error(550)file unavailable(e.g,file not found,no access).
here that code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.IO;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public string ftpServerIP;
public string ftpUserID;
public string ftpPassword;
public string remoteDir;
public string localDestnDir;
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
ftpServerIP = "xxxx";
ftpUserID = "xxxxxx";
ftpPassword = "xxx";
remoteDir = "Test1";
localDestnDir="C:\\";
string[] files = GetFileList();
foreach (string file in files)
{
Download(file);
}
}
public string[] GetFileList()
{
string[] downloadFiles;
StringBuilder result = new StringBuilder();
WebResponse response = null;
StreamReader reader = null;
try
{
FtpWebRequest reqFTP;
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/"));
reqFTP.UseBinary = true;
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
reqFTP.Proxy = null;
reqFTP.KeepAlive = false;
reqFTP.UsePassive = false;
response = reqFTP.GetResponse();
reader = new StreamReader(response.GetResponseStream());
string line = reader.ReadLine();
while (line != null)
{
result.Append(line);
result.Append("\n");
line = reader.ReadLine();
}
// to remove the trailing ''\n''
result.Remove(result.ToString().LastIndexOf(''\n''), 1);
return result.ToString().Split(''\n'');
}
catch (Exception ex)
{
if (reader != null)
{
reader.Close();
}
if (response != null)
{
response.Close();
}
downloadFiles = null;
return downloadFiles;
}
}
private void Download(string file)
{
try
{
string uri = "ftp://" + ftpServerIP + "/" + remoteDir + "/" + file;
Uri serverUri = new Uri(uri);
if (serverUri.Scheme != Uri.UriSchemeFtp)
{
return;
}
FtpWebRequest reqFTP;
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + remoteDir + "/" + file));
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
reqFTP.KeepAlive = false;
reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
reqFTP.UseBinary = true;
reqFTP.Proxy = null;
reqFTP.UsePassive = false;
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
Stream responseStream = response.GetResponseStream();
FileStream writeStream = new FileStream(localDestnDir + "/" + file, 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);
}
writeStream.Close();
response.Close();
}
catch (WebException wEx)
{
MessageBox.Show(wEx.Message, "Download Error");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Download Error");
}
}
}
}
推荐答案
result.Append(line);
result.Append("\ n");
result.Append(line);
result.Append("\n");
这不会做您希望的. result.AppendLine，将.
This will not do what you hope. result.AppendLine, will.
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