using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.IO;
 
namespace FTP_Search
{
    public partial class Form1 : Form
    {
        private void Upload(string filename)
        {
            FileInfo fileInf = new FileInfo(filename);
            string uri = "<a href="ftp://ftp.nuaa.edu.cn/">ftp://ftp.nuaa.edu.cn/</a>" + fileInf.Name;
            FtpWebRequest reqFTP;
 
            // 根据uri创建FtpWebRequest对象
            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
 
            // ftp用户名和密码
            reqFTP.Credentials = new NetworkCredential("nuaa", "nuaa");
 
            // 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;
 
            // 指定数据传输类型
            reqFTP.UseBinary = true;
 
            // 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2kb
            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2kb
                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");
            }
        }
 
        private void Download(string filePath, string fileName)
        {
            FtpWebRequest reqFTP;
 
            try
            {
                FileStream outputStream = new FileStream(filePath + "" + fileName, FileMode.Create);
 
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("<a href="ftp://ftp.nuaa.edu.cn/">ftp://ftp.nuaa.edu.cn</a>"));
 
                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
 
                reqFTP.UseBinary = true;
 
                reqFTP.Credentials = new NetworkCredential("nuaa", "nuaa");
 
                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 &gt; 0)
                {
                    outputStream.Write(buffer, 0, readCount);
 
                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                }
 
                ftpStream.Close();
 
                outputStream.Close();
 
                response.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
 
        public string[] GetFileList()
        {
            string[] downloadFiles;
            StringBuilder result = new StringBuilder();
            FtpWebRequest reqFTP;
            try
            {
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("<a href="ftp://ftp2.nuaa.edu.cn/">ftp://ftp2.nuaa.edu.cn</a>"));
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential("nuaa", "nuaa");
                reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
                WebResponse response = reqFTP.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream(),Encoding.GetEncoding("GB2312"));
                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 Form1()
        {
            InitializeComponent();
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
            MessageBox.Show(GetFileList()[1]);
        }
    }
}