判断FTP连接

public bool CheckFtp()
{try{FtpWebRequest ftprequest = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI));// ftp用户名和密码ftprequest.Credentials = new NetworkCredential(ftpUserID, ftpPassword);ftprequest.Method = WebRequestMethods.Ftp.ListDirectory;ftprequest.Timeout = 3000;FtpWebResponse ftpResponse = (FtpWebResponse)ftprequest.GetResponse();ftpResponse.Close();return true;}catch (Exception ex){return false;}
}

FTP文件上传

参数localfile为要上传的本地文件，ftpfile为上传到FTP的文件名称，ProgressBar为显示上传进度的滚动条，适用于WinForm。若应用于控制台程序，只要重写该函数，将参数ProgressBar去掉即可，同时将函数实现里所有涉及ProgressBar的地方都删掉。

public void Upload(string localfile, string ftpfile, System.Windows.Forms.ProgressBar pb)
{FileInfo fileInf = new FileInfo(localfile);FtpWebRequest reqFTP;reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + ftpfile));reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);reqFTP.Method = WebRequestMethods.Ftp.UploadFile;reqFTP.KeepAlive = false;reqFTP.UseBinary = true;reqFTP.ContentLength = fileInf.Length;if (pb != null){pb.Maximum = Convert.ToInt32(reqFTP.ContentLength / 2048);pb.Maximum = pb.Maximum + 1;pb.Minimum = 0;pb.Value = 0;}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);if (pb != null){if (pb.Value != pb.Maximum)pb.Value = pb.Value + 1;}contentLen = fs.Read(buff, 0, buffLength);System.Windows.Forms.Application.DoEvents();}if (pb != null)pb.Value = pb.Maximum;System.Windows.Forms.Application.DoEvents();strm.Close();fs.Close();}catch (Exception ex){throw new Exception(ex.Message);}
}

FTP文件下载

参数localfilename为将下载到本地的文件名称，ftpfilename为要下载的FTP上文件名称，ProcessBar为用于显示下载进度的进度条。该函数用于WinForm，若用于控制台，只要重写该函数，删除所有涉及ProcessBar的代码即可。

public void Download(string localfilename, string ftpfileName, System.Windows.Forms.ProgressBar pb)
{long fileSize = GetFileSize(ftpfileName);if (fileSize > 0){if (pb != null){pb.Maximum = Convert.ToInt32(fileSize / 2048);pb.Maximum = pb.Maximum + 1;pb.Minimum = 0;pb.Value = 0;}try{FileStream outputStream = new FileStream(localfilename, FileMode.Create);FtpWebRequest reqFTP;reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + ftpfileName));reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;reqFTP.UseBinary = true;FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();Stream ftpStream = response.GetResponseStream();int bufferSize = 2048;int readCount;byte[] buffer = new byte[bufferSize];readCount = ftpStream.Read(buffer, 0, bufferSize);while (readCount > 0){outputStream.Write(buffer, 0, readCount);if (pb != null){if (pb.Value != pb.Maximum)pb.Value = pb.Value + 1;}readCount = ftpStream.Read(buffer, 0, bufferSize);System.Windows.Forms.Application.DoEvents();}if (pb != null)pb.Value = pb.Maximum;System.Windows.Forms.Application.DoEvents();ftpStream.Close();outputStream.Close();response.Close();}catch (Exception ex){File.Delete(localfilename);throw new Exception(ex.Message);}}
}

删除指定FTP文件

 public void Delete(string fileName){try{FtpWebRequest reqFTP;reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + fileName));reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;reqFTP.KeepAlive = 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(ex.Message);}}

删除指定FTP文件夹

 public void RemoveDirectory(string urlpath){try{string uri = ftpURI + urlpath;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){throw new Exception(ex.Message);}}

获取FTP上文件夹/文件列表

ListType=1代表获取文件列表，ListType=2代表获取文件夹列表，ListType=3代表获取文件和文件夹列表。
Detail=true时获文件或文件夹详细信息，Detail=false时只获取文件或文件夹名称。
Keyword是只需list名称包含Keyword的文件或文件夹，若要list所有文件或文件夹，则该参数为空。若ListType=3，则该参数无效。

public List<string> GetFileDirctoryList(int ListType, bool Detail, string Keyword)
{List<string> strs = new List<string>();try{FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI));// ftp用户名和密码reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);if (Detail)reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;elsereqFTP.Method = WebRequestMethods.Ftp.ListDirectory;WebResponse response = reqFTP.GetResponse();StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名string line = reader.ReadLine();while (line != null){if (ListType == 1){if (line.Contains(".")){if (Keyword.Trim() == "*.*" || Keyword.Trim() == ""){strs.Add(line);}else if (line.IndexOf(Keyword.Trim()) > -1){strs.Add(line);}}}else if (ListType == 2){if (!line.Contains(".")){if (Keyword.Trim() == "*" || Keyword.Trim() == ""){strs.Add(line);}else if (line.IndexOf(Keyword.Trim()) > -1){strs.Add(line);}}}else if (ListType == 3){strs.Add(line);}line = reader.ReadLine();}reader.Close();response.Close();return strs;}catch (Exception ex){throw new Exception(ex.Message);}
}

创建文件夹

  public void MakeDir(string dirName){FtpWebRequest reqFTP;try{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){throw new Exception(ex.Message);}}

获取指定FTP文件大小

public long GetFileSize(string ftpfileName)
{long fileSize = 0;try{FtpWebRequest reqFTP;reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + ftpfileName));reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;reqFTP.UseBinary = true;FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();Stream ftpStream = response.GetResponseStream();fileSize = response.ContentLength;ftpStream.Close();response.Close();}catch (Exception ex){throw new Exception(ex.Message);}return fileSize;
}

更改指定FTP文件名称

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){throw new Exception(ex.Message);}
}

移动指定FTP文件

移动FTP文件其实就是重命名文件，只要将目标文件指定一个新的FTP地址就可以了。我没用过，不知道是否可行，因为C++是这么操作的。

public void MovieFile(string currentFilename, string newDirectory)
{ReName(currentFilename, newDirectory);
}

应用示例

将上面的内容打包到下面这个FTP类中，就可以在你的业务代码中调用了。

using System;
using System.IO;
using System.Net;
using System.Collections.Generic;namespace TECSharpFunction
{/// <summary>/// FTP操作/// </summary>public class FTPHelper{#region FTPConfigstring ftpURI;string ftpUserID;string ftpServerIP;string ftpPassword;string ftpRemotePath;#endregion/// <summary>  /// 连接FTP服务器/// </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 FTPHelper(string FtpServerIP, string FtpRemotePath, string FtpUserID, string FtpPassword){ftpServerIP = FtpServerIP;ftpRemotePath = FtpRemotePath;ftpUserID = FtpUserID;ftpPassword = FtpPassword;ftpURI = "ftp://" + ftpServerIP + "/" + ftpRemotePath + "/";}//把上面介绍的那些方法都放到下面}
}

举个例子：

using System;
using System.IO;
using System.Net;
using System.Collections.Generic;
uusing TECSharpFunction;namespace FTPTest
{public partial class Form1 : Form{public Form1(){InitializeComponent();}Public void FTP_Test(){FTPHelper ftpClient = new FTPHelper("192.168.1.1",@"/test","Test","Test");ftpClient.Download("test.txt", "test1.txt", progressBar1);}}
}

好了，就这样吧！
————————————————
版权声明：本文为CSDN博主「只会搬运的小菜鸟」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/u011465910/article/details/126563124

c# FTP服务器文件上传下载等操作相关推荐

文件上传到ftp服务器大小变小,ftp服务器文件上传大小设置
ftp服务器文件上传大小设置内容精选换一换文件选择上传控件,用于上传文件. Windows场景中,当把源端服务器迁移到华为云后,目的端服务器C盘的已用空间比对应源端服务器C盘的已用空间大至少1G ...
华为服务器上传文件后怎么通过链接查看,远程服务器文件上传后的操作
远程服务器文件上传后的操作内容精选换一换本节指导您基于Linux操作系统环境完成镜像文件快速导入,推荐使用云平台的EulerOS云服务器作为转换镜像格式和生成位表文件的环境.Linux操作系统环 ...
java jsch下载文件,JSch使用sftp协议实现服务器文件上传下载操作
Jsch是什么? JSch 是SSH2的一个纯Java实现.它允许你连接到一个sshd 服务器,使用端口转发,X11转发,文件传输等等.你可以将它的功能集成到你自己的程序中.同时该项目也提供一个J2 ...
python实现TCP远程服务器文件上传,下载系统
TCP服务器代码如下: from socket import *def client_upload(client_socket):"""上传数据""& ...
Mac使用终端ssh对服务器文件上传下载（实用！）
原博链接:https://blog.csdn.net/zcl_666/article/details/52240511#comments 在windows系统下有xshell可以很方便的登录服务器上传 ...
cypress之实现文件上传下载以及操作iframe下页面元素
前面讲解了使用cypress框架如何定位.操作页面元素以及校验测试结果,此次课程将介绍如何实现文件上传.操作iframe下面的页面原因以及操作shadow dom下的页面元素.为了完成此次课程目标,拆 ...
linux搭建ftp服务器可上传下载,通过linux系统搭建ftp服务然后使用filezilla客户端进行上传下载...
1. 准备环境一台linux主机作为ftp服务器(这里以centos7.2系统为例),一台Windows系统的主机作为客户端 2. 服务端配置: (1) 下载vs ...
java操作文件_java操作FTP，实现文件上传下载删除操作
上传文件到FTP服务器: /** * Description: 向FTP服务器上传文件 * @param url FTP服务器hostname * @param port FTP服务器端口,如果默认端 ...
东软JavaWeb实训记-DAY8-小组项目开发实践（文件上传下载等操作）
项目结构其他: 源代码: package com.neu.dao;public class FileInfoDao extends BaseDao {public FileInfoDao() {su ...

c# FTP服务器文件上传下载等操作

文章目录