C# FTP操作（上传、下载等……）| Id | Title | DateAdded | SourceUrl | PostType | Body | BlogId | Description | DateUpdated | IsMarkdown | EntryName | CreatedTime | IsActive | AutoDesc | AccessPermission |
| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------|
| 17285550| C# FTP操作（上传、下载等……）| 2023-04-04T10:24:00| | BlogPost|
目录
判断FTP连接
FTP文件上传
FTP文件下载
删除指定FTP文件
删除指定FTP文件夹
获取FTP上文件夹/文件列表
创建文件夹
获取指定FTP文件大小
更改指定FTP文件名称
移动指定FTP文件
应用示例
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();
</span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">true</span><span style="color: #000000;">;
}
</span><span style="color: #0000ff;">catch</span><span style="color: #000000;"> (Exception ex)
{
</span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">false</span><span style="color: #000000;">;
}
}</span></pre>
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;
</span><span style="color: #0000ff;">int</span><span style="color: #000000;"> readCount;
</span><span style="color: #0000ff;">byte</span>[] buffer = <span style="color: #0000ff;">new</span> <span style="color: #0000ff;">byte</span><span style="color: #000000;">[bufferSize];
readCount </span>= ftpStream.Read(buffer, <span style="color: #800080;">0</span><span style="color: #000000;">, bufferSize);
</span><span style="color: #0000ff;">while</span> (readCount > <span style="color: #800080;">0</span><span style="color: #000000;">)
{
outputStream.Write(buffer, </span><span style="color: #800080;">0</span><span style="color: #000000;">, readCount);
</span><span style="color: #0000ff;">if</span> (pb != <span style="color: #0000ff;">null</span><span style="color: #000000;">)
{
</span><span style="color: #0000ff;">if</span> (pb.Value !=<span style="color: #000000;"> pb.Maximum)
pb.Value </span>= pb.Value + <span style="color: #800080;">1</span><span style="color: #000000;">;
}
readCount </span>= ftpStream.Read(buffer, <span style="color: #800080;">0</span><span style="color: #000000;">, bufferSize);
System.Windows.Forms.Application.DoEvents();
}
</span><span style="color: #0000ff;">if</span> (pb != <span style="color: #0000ff;">null</span><span style="color: #000000;">)
pb.Value </span>=<span style="color: #000000;"> pb.Maximum;
System.Windows.Forms.Application.DoEvents();
ftpStream.Close();
outputStream.Close();
response.Close();
}
</span><span style="color: #0000ff;">catch</span><span style="color: #000000;"> (Exception ex)
{
File.Delete(localfilename);
</span><span style="color: #0000ff;">throw</span> <span style="color: #0000ff;">new</span><span style="color: #000000;"> Exception(ex.Message);
}
}
}</span></pre>
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。
————————————————
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
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;
else
reqFTP.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 FTPConfig
string 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