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C# FTP操作类

 
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using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;

namespace Utility
{
public class FtpUpDown
{

string ftpServerIP;

string ftpUserID;

string ftpPassword;

FtpWebRequest reqFTP;

private void Connect(String path)//连接ftp
{

// 根据uri创建FtpWebRequest对象

reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));

// 指定数据传输类型

reqFTP.UseBinary = true;

//ftp用户名和密码

reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);

}

public FtpUpDown(string ftpServerIP, string ftpUserID, string ftpPassword)
{
this.ftpServerIP = ftpServerIP;

this.ftpUserID = ftpUserID;

this.ftpPassword = ftpPassword;
}

//都调用这个

private string[] GetFileList(string path, string WRMethods)//上面的代码示例了如何从ftp服务器上获得文件列表
{
string[] downloadFiles;
StringBuilder result = new StringBuilder();
try
{
Connect(path);

reqFTP.Method = WRMethods;

WebResponse response = reqFTP.GetResponse();

StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.Default);//中文文件名

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);

reader.Close();

response.Close();

return result.ToString().Split('\n');

}

catch (Exception ex)
{
Log.WriteError("Get FileList Error:" + ex.Message);
downloadFiles = null;

return downloadFiles;
}
}

public string[] GetFileList(string path)//上面的代码示例了如何从ftp服务器上获得文件列表
{
return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectory);
}
public string[] GetFileList()//上面的代码示例了如何从ftp服务器上获得文件列表
{
return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectory);
}

public void Upload(string filename) //上面的代码实现了从ftp服务器上载文件的功能
{
FileInfo fileInf = new FileInfo(filename);

string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;

Connect(uri);//连接

// 默认为true，连接不会被关闭

// 在一个命令之后被执行

reqFTP.KeepAlive = false;

// 指定执行什么命令

reqFTP.Method = WebRequestMethods.Ftp.UploadFile;

// 上传文件时通知服务器文件的大小

reqFTP.ContentLength = fileInf.Length;
// 缓冲大小设置为kb
int buffLength = 2048;
byte[] buff = new byte[buffLength];

int contentLen;

// 打开一个文件流(System.IO.FileStream) 去读上传的文件

FileStream fs = fileInf.OpenRead();

try
{

// 把上传的文件写入流

Stream strm = reqFTP.GetRequestStream();

// 每次读文件流的kb

contentLen = fs.Read(buff, 0, buffLength);

// 流内容没有结束

while (contentLen != 0)
{
// 把内容从file stream 写入upload stream
strm.Write(buff, 0, contentLen);
contentLen = fs.Read(buff, 0, buffLength);

}

// 关闭两个流

strm.Close();

fs.Close();

}

catch (Exception ex)
{
Log.WriteError( "Upload Error:" + ex.Message);
}

}

public bool Download(string filePath, string fileName, out string errorinfo)////上面的代码实现了从ftp服务器下载文件的功能
{
try
{
String onlyFileName = Path.GetFileName(fileName);

string newFileName = filePath + "\\" + onlyFileName;

if (File.Exists(newFileName))
{

errorinfo = string.Format("本地文件{0}已存在,无法下载", newFileName);
return false;
}
string url = "ftp://" + ftpServerIP + "/" + fileName;
Connect(url);//连接
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
Stream ftpStream = response.GetResponseStream();
long cl = response.ContentLength;
int bufferSize = 2048;
int readCount;
byte[] buffer = new byte[bufferSize];
readCount = ftpStream.Read(buffer, 0, bufferSize);

FileStream outputStream = new FileStream(newFileName, FileMode.Create);
while (readCount > 0)
{
outputStream.Write(buffer, 0, readCount);
readCount = ftpStream.Read(buffer, 0, bufferSize);
}
ftpStream.Close();
outputStream.Close();
response.Close();

errorinfo = "";

return true;

}

catch (Exception ex)
{
errorinfo = string.Format("因{0},无法下载", ex.Message);

return false;

}

}

//删除文件

public void DeleteFileName(string fileName)
{
try
{
FileInfo fileInf = new FileInfo(fileName);

string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;

Connect(uri);//连接

// 默认为true，连接不会被关闭

// 在一个命令之后被执行

reqFTP.KeepAlive = false;

// 指定执行什么命令

reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;

FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
response.Close();

}

catch (Exception ex)
{
Log.WriteError("删除错误:" + ex.Message);
}

}

//创建目录

public void MakeDir(string dirName)
{
try
{
string uri = "ftp://" + ftpServerIP + "/" + dirName;

Connect(uri);//连接

reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;

FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

response.Close();

}

catch (Exception ex)
{
Log.WriteError("创建目录错误:" + ex.Message);
}

}

//删除目录

public void delDir(string dirName)
{
try
{
string uri = "ftp://" + ftpServerIP + "/" + dirName;

Connect(uri);//连接

reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;

FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

response.Close();

}

catch (Exception ex)
{
Log.WriteError("删除目录错误:" + ex.Message);
}

}

//获得文件大小

public long GetFileSize(string filename)
{

long fileSize = 0;

try
{

FileInfo fileInf = new FileInfo(filename);

string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;

Connect(uri);//连接

reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;

FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

fileSize = response.ContentLength;

response.Close();

}

catch (Exception ex)
{
Log.WriteError("获得文件大小错误:" + ex.Message);
}

return fileSize;

}

//文件改名

public void Rename(string currentFilename, string newFilename)
{
try
{
FileInfo fileInf = new FileInfo(currentFilename);
string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
Connect(uri);//连接
reqFTP.Method = WebRequestMethods.Ftp.Rename;
reqFTP.RenameTo = newFilename;
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
response.Close();

}

catch (Exception ex)
{
Log.WriteError("文件改名错误:" + ex.Message);
}

}
//读取文件

public Stream ReadFile(string fileName)
{
try
{
string url = "ftp://" + ftpServerIP + "/" + fileName;
Connect(url);//连接
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
Stream ftpStream = response.GetResponseStream();
return ftpStream;
}

catch (Exception ex)
{
Log.WriteError("读取文件错误:" + ex.Message);
return null;
}

}

//获得文件明晰

public string[] GetFilesDetailList()
{

return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectoryDetails);

}

//获得文件明晰

public string[] GetFilesDetailList(string path)
{

return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectoryDetails);

}

// 文件存在检查
public bool fileCheckExist(string fileName)
{
bool success = false;
FtpWebResponse response = null;
StreamReader reader = null;
try
{
string url = "ftp://" + ftpServerIP + "/" + fileName;
Connect(url);//连接
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
response = (FtpWebResponse)reqFTP.GetResponse();
reader = new StreamReader(response.GetResponseStream());
string line = reader.ReadLine();
if (line != null)
{
success = true;
}
}
catch (Exception)
{
success = false;
}
finally
{
if (reader != null)
{
reader.Close();
}

if (response != null)
{
response.Close();
}
}
return success;
}
}
}

匿名登录FTP

用 ftp_connect,ftp_login 匿名登录FTP时，用户名为：anonymous 密码为：空

FTP获取文件路径和子目录路径 
 1         /// <summary>
 2         /// 从ftp服务器上获得文件列表
 3         /// </summary>
 4         /// <param name="RequedstPath"></param>
 5         /// <returns></returns>
 6         public static List<string> GetDirctory(string RequedstPath)
 7         {
 8             List<string> strs = new List<string>();
 9             try
10             {
11                 string uri = path + RequedstPath;   //目标路径 path为服务器地址
12                 FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
13                 // ftp用户名和密码
14                 reqFTP.Credentials = new NetworkCredential(username, password);
15                 reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
16                 WebResponse response = reqFTP.GetResponse();
17                 StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名
18 
19                 string line = reader.ReadLine();
20                 while (line != null)
21                 {
22                     if (line.Contains("<DIR>"))
23                     {
24                         string msg = line.Substring(line.LastIndexOf("<DIR>")+5).Trim();
25                         strs.Add(msg);
26                     }
27                     line = reader.ReadLine();
28                 }
29                 reader.Close();
30                 response.Close();
31                 return strs;
32             }
33             catch (Exception ex)
34             {
35                 Console.WriteLine("获取目录出错：" + ex.Message);
36             }
37             return strs;
38         }
39 
40         /// <summary>
41         /// 从ftp服务器上获得文件
42         /// </summary>
43         /// <param name="RequedstPath">相对服务器路径</param>
44         /// <returns></returns>
45         public static List<string> GetFile(string RequedstPath)
46         {
47             List<string> strs = new List<string>();
48             try
49             {
50                 string uri = path + RequedstPath;   //目标路径 path为服务器地址
51                 FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
52                 // ftp用户名和密码
53                 reqFTP.Credentials = new NetworkCredential(username, password);
54                 reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
55                 WebResponse response = reqFTP.GetResponse();
56                 StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名
57 
58                 string line = reader.ReadLine();
59                 while (line != null)
60                 {
61                     if (!line.Contains("<DIR>"))
62                     {
63                         string msg = line.Substring(39).Trim();
64                         strs.Add(msg);
65                         Console.WriteLine(msg);
66                     }
67                     line = reader.ReadLine();
68                 }
69                 reader.Close();
70                 response.Close();
71                 return strs;
72             }
73             catch (Exception ex)
74             {
75                 Console.WriteLine("获取文件出错：" + ex.Message);
76             }
77             return strs;
78         }

知道如何获取文件和目录，剩下的就是一个递归而已。这个很简单，不说明了。递归这东西好玩，但是效率很低。

Ron Ngai|园豆：358(菜鸟二级)|2012-07-25 18:28
        /// <summary>
        /// 从ftp服务器上获得文件列表
        /// </summary>
        /// <param name="RequedstPath"></param>
        /// <returns></returns>
        public static List<string> GetDirctory(string RequedstPath)
        {
            List<string> strs = new List<string>();
            try
            {
                string uri = path + RequedstPath;   //目标路径 path为服务器地址
                FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                // ftp用户名和密码
                reqFTP.Credentials = new NetworkCredential(username, password);
                reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                WebResponse response = reqFTP.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名

                string line = reader.ReadLine();
                while (line != null)
                {
                    if (line.Contains("<DIR>"))
                    {
                        string msg = line.Substring(line.LastIndexOf("<DIR>")+5).Trim();
                        strs.Add(msg);
                    }
                    line = reader.ReadLine();
                }
                reader.Close();
                response.Close();
                return strs;
            }
            catch (Exception ex)
            {
                Console.WriteLine("获取目录出错：" + ex.Message);
            }
            return strs;
        }

        /// <summary>
        /// 从ftp服务器上获得文件
        /// </summary>
        /// <param name="RequedstPath">相对服务器路径</param>
        /// <returns></returns>
        public static List<string> GetFile(string RequedstPath)
        {
            List<string> strs = new List<string>();
            try
            {
                string uri = path + RequedstPath;   //目标路径 path为服务器地址
                FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                // ftp用户名和密码
                reqFTP.Credentials = new NetworkCredential(username, password);
                reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                WebResponse response = reqFTP.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名

                string line = reader.ReadLine();
                while (line != null)
                {
                    if (!line.Contains("<DIR>"))
                    {
                        string msg = line.Substring(39).Trim();
                        strs.Add(msg);
                        Console.WriteLine(msg);
                    }
                    line = reader.ReadLine();
                }
                reader.Close();
                response.Close();
                return strs;
            }
            catch (Exception ex)
            {
                Console.WriteLine("获取文件出错：" + ex.Message);
            }
            return strs;
        }

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