FtpUpDownLoad~_ftpeo-优快云博客

本文提供了一个C#类，用于实现FTP的基本操作，包括文件上传、下载、删除、获取文件列表及详细信息、创建和删除目录等。同时介绍了如何使用此类进行实际的FTP交互。

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using System;

using System.Collections.Generic;

using System.Text;

using System.Net;

using System.IO;

using System.Windows.Forms;

namespace ConvertData
{

class FtpUpDownLoad
{

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 FtpUpDownLoad(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)
{

System.Windows.Forms.MessageBox.Show(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)
            {
                MessageBox.Show(ex.Message, "Upload Error");
            }

        }
        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)
            {
                MessageBox.Show(ex.Message, "删除错误");
            }

}

//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)
            {
                MessageBox.Show(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)
{

MessageBox.Show(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)
{

MessageBox.Show(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();
                //Stream ftpStream = response.GetResponseStream();
                //ftpStream.Close();
                response.Close();
            }

            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

}

//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);
        }

}