【C#】C#中FTP的操作
C#完成与FTP服务器交互的功能代码。包括连接FTP、上传文件、下载文件、创建文件夹、删除文件夹、目录列表、获取指定文件大小、对文件的重命名、移动文件、判断路径是否存在等功能。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Net;
using System.Windows.Forms;
namespace TestFTP
{
public class FtpHelper
{
private string ftpServerIP;
private string ftpRemotePath;
private string ftpUserID;
private string ftpPassword;
private string ftpURI;
///
/// 连接FTP
///
/// FTP连接地址
/// 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
/// 用户名
/// 密码
public FtpHelper(string ServerIP, string RemotePath, string UserID, string Password)
{
ftpServerIP = ServerIP;
ftpRemotePath = RemotePath;
ftpUserID = UserID;
ftpPassword = Password;
ftpURI = "ftp://" + ftpServerIP + ftpRemotePath + "/";
}
///
/// 上传
///
/// 文件名
public void UploadFile(string FileName)
{
FileInfo fileInfo = new FileInfo(FileName);
string uri = ftpURI + fileInfo.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.UsePassive = false;
reqFTP.ContentLength = fileInfo.Length;
int BufferSize = 2048;
byte[] buff = new byte[BufferSize];
int ContentLength;
FileStream fs = fileInfo.OpenRead();
try
{
Stream strm = reqFTP.GetRequestStream();
ContentLength = fs.Read(buff, 0, BufferSize);
while (ContentLength != 0)
{
strm.Write(buff, 0, ContentLength);
ContentLength = fs.Read(buff, 0, BufferSize);
}
strm.Close();
fs.Close();
}
catch (Exception ex)
{
throw new Exception("Ftphelper Upload Error --> " + ex.Message);
}
}
///
/// 下载
///
/// 文件路径
/// 文件名
public void DownloadFile(string FileName, string LocalSavePath)
{
FtpWebRequest reqFTP;
try
{
FileStream outputStream = new FileStream(LocalSavePath, FileMode.Create);
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpUserID + ":" + ftpPassword + "@" + ftpServerIP + "/" + FileName));
reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
reqFTP.UseBinary = true;
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
reqFTP.UsePassive = false;
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)
{
//throw ex;
MessageBox.Show("ex: " + ex);
}
}
///
/// 删除文件夹
///
/// 文件夹名
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;
reqFTP.UsePassive = false;
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)
{
throw new Exception("FtpHelper Delete Error --> " + ex.Message + " 文件名:" + folderName);
}
}
///
/// 获取当前目录下明细(包含文件和文件夹)
///
/// 名称数组
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;
ftp.UsePassive = false;
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;
throw new Exception("FtpHelper Error --> " + ex.Message);
}
}
///
/// 获取当前目录下文件列表(仅文件)
///
///
/// 获取当前目录下所有的文件夹列表(仅文件夹)
///
/// ");
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);
}
///
/// 判断当前目录下指定的子目录是否存在
///
/// 指定的目录名
public bool DirectoryExist(string RemoteDirectoryName)
{
string[] dirList = GetDirectoryList();
foreach (string str in dirList)
{
if (str.Trim() == RemoteDirectoryName.Trim())
{
return true;
}
}
return false;
}
///
/// 判断当前目录下指定的文件是否存在
///
/// 远程文件名
public bool FileExist(string RemoteFileName)
{
string[] fileList = GetFileList("*.*");
foreach (string str in fileList)
{
if (str.Trim() == RemoteFileName.Trim())
{
return true;
}
}
return false;
}
///
/// 创建文件夹
///
///
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.UsePassive = false;
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
Stream ftpStream = response.GetResponseStream();
ftpStream.Close();
response.Close();
}
catch (Exception ex)
{
throw new Exception("FtpHelper MakeDir Error --> " + ex.Message);
}
}
///
/// 获取指定文件大小
///
///
///
/// 改名
///
///
///
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.UsePassive = false;
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
Stream ftpStream = response.GetResponseStream();
ftpStream.Close();
response.Close();
}
catch (Exception ex)
{
throw new Exception("FtpHelper ReName Error --> " + ex.Message);
}
}
///
/// 移动文件
///
///
///
public void MovieFile(string currentFilename, string newDirectory)
{
ReName(currentFilename, newDirectory);
}
///
/// 切换当前目录
///
///
/// true 绝对路径 false 相对路径
public void GotoDirectory(string DirectoryName, bool IsRoot)
{
if (IsRoot)
{
ftpRemotePath = DirectoryName;
}
else
{
ftpRemotePath += DirectoryName + "/";
}
ftpURI = "ftp://" + ftpServerIP + "/" + ftpRemotePath + "/";
}
}
}