c# FTP操作类

代码
不要忘记引入命名空间
using System.Net;
using System.IO;
下面的几个步骤包括了使用FtpWebRequest类实现ftp功能的一般过程

1、创建一个FtpWebRequest对象，指向ftp服务器的uri
2、设置ftp的执行方法（上传，下载等）
3、给FtpWebRequest对象设置属性（是否支持ssl，是否使用二进制传输等）
4、设置登录验证（用户名，密码）
5、执行请求
6、接收相应流（如果需要的话）
7、如果没有打开的流，则关闭ftp请求

C#语言: Codee#2416
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;
using System.Windows.Forms;
using System.Globalization;
namespace FtpLib
{
public class FtpWeb
{

string ftpServerIP;
string ftpRemotePath;
string ftpUserID;
string ftpPassword;
string ftpURI;
/// <summary>
/// 连接FTP
/// </summary>
/// <param name="FtpServerIP">FTP连接地址</param>
/// <param name="FtpRemotePath">指定FTP连接成功后的当前目录, 如果不指定即默认为根目录</param>
/// <param name="FtpUserID">用户名</param>
/// <param name="FtpPassword">密码</param>

public FtpWeb(string FtpServerIP, string FtpRemotePath, string FtpUserID, string FtpPassword)
{
ftpServerIP = FtpServerIP;
ftpRemotePath = FtpRemotePath;
ftpUserID = FtpUserID;
ftpPassword = FtpPassword;
ftpURI = "ftp://" + ftpServerIP + "/" + ftpRemotePath + "/";
}
/// <summary>
/// 上传
/// </summary>
/// <param name="filename"></param>
public void Upload(string filename)
{
FileInfo fileInf = new FileInfo(filename);
string uri = ftpURI + fileInf.Name;
FtpWebRequest reqFTP;
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
reqFTP.KeepAlive = false;
reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
reqFTP.UseBinary = true;
reqFTP.ContentLength = fileInf.Length;
int buffLength = 2048;
byte[] buff = new byte[buffLength];
int contentLen;

FileStream fs = fileInf.OpenRead();
try
{
Stream strm = reqFTP.GetRequestStream();
contentLen = fs.Read(buff, 0, buffLength);
while (contentLen != 0)

{

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

}
strm.Close();
fs.Close();

}
catch (Exception ex)

{
Insert_Standard_ErrorLog.Insert("FtpWeb", "Upload Error --> " + ex.Message);
}

}

/// <summary>
/// 下载
/// </summary>
/// <param name="filePath"></param>
/// <param name="fileName"></param>
public void Download(string filePath, string fileName)
{
FtpWebRequest reqFTP;
try
{

FileStream outputStream = new FileStream(filePath + "\\" + fileName, FileMode.Create);

reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + fileName));

reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;

reqFTP.UseBinary = true;

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);

while (readCount > 0)
{
    outputStream.Write(buffer, 0, readCount);
    readCount = ftpStream.Read(buffer, 0, bufferSize);
}
ftpStream.Close();
outputStream.Close();
response.Close();
}
catch (Exception ex)
{
Insert_Standard_ErrorLog.Insert("FtpWeb", "Download Error --> " + ex.Message);
}
}
/// <summary>

/// 删除文件
/// </summary>
/// <param name="fileName"></param>
public void Delete(string fileName)
{
try
{
string uri = ftpURI + fileName;
FtpWebRequest reqFTP;
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
reqFTP.KeepAlive = false;
reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;
string result = String.Empty;
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
long size = response.ContentLength;
Stream datastream = response.GetResponseStream();
StreamReader sr = new StreamReader(datastream);
result = sr.ReadToEnd();
sr.Close();
datastream.Close();
response.Close();
}

catch (Exception ex)
{
Insert_Standard_ErrorLog.Insert("FtpWeb", "Delete Error --> " + ex.Message + "  文件名:" + fileName);
}

}
/// <summary>
/// 删除文件夹
/// </summary>
/// <param name="folderName"></param>
public void RemoveDirectory(string folderName)
{
try
{

string uri = ftpURI + folderName;

FtpWebRequest reqFTP;

reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);

reqFTP.KeepAlive = false;

reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;

string result = String.Empty;

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

long size = response.ContentLength;

Stream datastream = response.GetResponseStream();

StreamReader sr = new StreamReader(datastream);

result = sr.ReadToEnd();

sr.Close();

datastream.Close();

response.Close();

}
catch (Exception ex)
{

Insert_Standard_ErrorLog.Insert("FtpWeb", "Delete Error --> " + ex.Message + "  文件名:" + folderName);
}

}
/// <summary>

/// 获取当前目录下明细(包含文件和文件夹)
/// </summary>
/// <returns></returns>
public string[] GetFilesDetailList()
{
string[] downloadFiles;
try
{
StringBuilder result = new StringBuilder();
FtpWebRequest ftp;
ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI));
ftp.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
ftp.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
WebResponse response = ftp.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default);

//while (reader.Read() > 0)
//{
//}

string line = reader.ReadLine();
//line = reader.ReadLine();
//line = reader.ReadLine();
while (line != null)
{
    result.Append(line);
    result.Append("\n");
    line = reader.ReadLine();
}

result.Remove(result.ToString().LastIndexOf("\n"), 1);
reader.Close();
response.Close();
return result.ToString().Split('\n');
}
catch (Exception ex)
{
downloadFiles = null;
Insert_Standard_ErrorLog.Insert("FtpWeb", "GetFilesDetailList Error --> " + ex.Message);
return downloadFiles;
}
}


/// <summary>
/// 获取当前目录下文件列表(仅文件)
/// </summary>
/// <returns></returns>
public string[] GetFileList(string mask)
{
string[] downloadFiles;

StringBuilder result = new StringBuilder();

FtpWebRequest reqFTP;
try
{

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

reqFTP.UseBinary = true;

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

reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;

WebResponse response = reqFTP.GetResponse();

StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default);

string line = reader.ReadLine();

while (line != null)
{
    if (mask.Trim() != string.Empty && mask.Trim() != "*.*")
    {
        string mask_ = mask.Substring(0, mask.IndexOf("*"));

        if (line.Substring(0, mask_.Length) == mask_)
        {
            result.Append(line);
            result.Append("\n");
        }
    }
    else
    {
        result.Append(line);
        result.Append("\n");
    }
    line = reader.ReadLine();
}

result.Remove(result.ToString().LastIndexOf('\n'), 1);
reader.Close();
response.Close();
return result.ToString().Split('\n');
}
catch (Exception ex)
{
downloadFiles = null;
if (ex.Message.Trim() != "远程服务器返回错误: (550) 文件不可用(例如，未找到文件，无法访问文件)。")
{
    Insert_Standard_ErrorLog.Insert("FtpWeb", "GetFileList Error --> " + ex.Message.ToString());
}
return downloadFiles;
}
}
/// <summary>
/// 获取当前目录下所有的文件夹列表(仅文件夹)
/// </summary>
/// <returns></returns>
public string[] GetDirectoryList()
{
string[] drectory = GetFilesDetailList();
string m = string.Empty;
foreach (string str in drectory)
{
int dirPos = str.IndexOf("<DIR>");
if (dirPos>0)
{
    /*判断 Windows 风格*/
    m += str.Substring(dirPos + 5).Trim() + "\n";
}
else if (str.Trim().Substring(0, 1).ToUpper() == "D")
{
    /*判断 Unix 风格*/
    string dir = str.Substring(54).Trim();
    if (dir != "." && dir != "..")
    {
        m += dir + "\n";
    }
}
}
char[] n = new char[] { '\n' };

return m.Split(n);

}



/// <summary>
/// 判断当前目录下指定的子目录是否存在
/// </summary>
/// <param name="RemoteDirectoryName">指定的目录名</param>
public bool DirectoryExist(string RemoteDirectoryName)
{

string[] dirList = GetDirectoryList();

foreach (string str in dirList)
{

if (str.Trim() == RemoteDirectoryName.Trim())

{

    return true;

}

}

return false;

}



/// <summary>
/// 判断当前目录下指定的文件是否存在
/// </summary>
/// <param name="RemoteFileName">远程文件名</param>
public bool FileExist(string RemoteFileName)
{
string[] fileList = GetFileList("*.*");

foreach (string str in fileList)

{

if (str.Trim() == RemoteFileName.Trim())

{

    return true;

}

}

return false;

}



/// <summary>

/// 创建文件夹

/// </summary>

/// <param name="dirName"></param>

public void MakeDir(string dirName)

{

FtpWebRequest reqFTP;

try

{

// dirName = name of the directory to create.

reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + dirName));

reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;

reqFTP.UseBinary = true;

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

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

Stream ftpStream = response.GetResponseStream();



ftpStream.Close();

response.Close();

}

catch (Exception ex)

{

Insert_Standard_ErrorLog.Insert("FtpWeb", "MakeDir Error --> " + ex.Message);

}

}



/// <summary>

/// 获取指定文件大小

/// </summary>

/// <param name="filename"></param>

/// <returns></returns>

public long GetFileSize(string filename)

{

FtpWebRequest reqFTP;

long fileSize = 0;

try

{

reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + filename));

reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;

reqFTP.UseBinary = true;

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

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

Stream ftpStream = response.GetResponseStream();

fileSize = response.ContentLength;



ftpStream.Close();

response.Close();

}

catch (Exception ex)

{

Insert_Standard_ErrorLog.Insert("FtpWeb", "GetFileSize Error --> " + ex.Message);

}

return fileSize;

}



/// <summary>

/// 改名

/// </summary>

/// <param name="currentFilename"></param>

/// <param name="newFilename"></param>

public void ReName(string currentFilename, string newFilename)

{

FtpWebRequest reqFTP;

try

{

reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + currentFilename));

reqFTP.Method = WebRequestMethods.Ftp.Rename;

reqFTP.RenameTo = newFilename;

reqFTP.UseBinary = true;

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

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

Stream ftpStream = response.GetResponseStream();



ftpStream.Close();

response.Close();

}

catch (Exception ex)

{

Insert_Standard_ErrorLog.Insert("FtpWeb", "ReName Error --> " + ex.Message);

}

}



/// <summary>

/// 移动文件

/// </summary>

/// <param name="currentFilename"></param>

/// <param name="newFilename"></param>

public void MovieFile(string currentFilename, string newDirectory)

{

ReName(currentFilename, newDirectory);

}



/// <summary>

/// 切换当前目录

/// </summary>

/// <param name="DirectoryName"></param>

/// <param name="IsRoot">true 绝对路径   false 相对路径</param>

public void GotoDirectory(string DirectoryName, bool IsRoot)

{

if (IsRoot)

{

ftpRemotePath = DirectoryName;

}

else

{

ftpRemotePath += DirectoryName + "/";

}

ftpURI = "ftp://" + ftpServerIP + "/" + ftpRemotePath + "/";

}



/// <summary>

/// 删除订单目录

/// </summary>

/// <param name="ftpServerIP">FTP 主机地址</param>

/// <param name="folderToDelete">FTP 用户名</param>

/// <param name="ftpUserID">FTP 用户名</param>

/// <param name="ftpPassword">FTP 密码</param>

public static void DeleteOrderDirectory(string ftpServerIP, string folderToDelete, string ftpUserID, string ftpPassword)

{

try{

if (!string.IsNullOrEmpty(ftpServerIP) && !string.IsNullOrEmpty(folderToDelete) && !string.IsNullOrEmpty(ftpUserID) && !string.IsNullOrEmpty(ftpPassword))

{

    FtpWeb fw = new FtpWeb(ftpServerIP, folderToDelete, ftpUserID, ftpPassword);

    //进入订单目录

    fw.GotoDirectory(folderToDelete, true);

    //获取规格目录

    string[] folders = fw.GetDirectoryList();

    foreach (string folder in folders)

    {

        if (!string.IsNullOrEmpty(folder) || folder != "")

        {

            //进入订单目录

            string subFolder = folderToDelete + "/" + folder;

            fw.GotoDirectory(subFolder, true);

            //获取文件列表

            string[] files = fw.GetFileList("*.*");

            if (files != null)

            {

                //删除文件

                foreach (string file in files)

                {

                    fw.Delete(file);

                }

            }

            //删除冲印规格文件夹

            fw.GotoDirectory(folderToDelete, true);

            fw.RemoveDirectory(folder);

        }

    }



    //删除订单文件夹

    string parentFolder = folderToDelete.Remove(folderToDelete.LastIndexOf('/'));

    string orderFolder = folderToDelete.Substring(folderToDelete.LastIndexOf('/') + 1);

    fw.GotoDirectory(parentFolder, true);

    fw.RemoveDirectory(orderFolder);

}

else

{

    throw new Exception("FTP 及路径不能为空！");

}

}

catch(Exception ex)

{

throw new Exception("删除订单时发生错误，错误信息为：" + ex.Message);

}

}

}





public class Insert_Standard_ErrorLog

{

public static void Insert(string x, string y)

{



}

}





}