c#连接ftp进行上传与下载的代码

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;
namespace ftponload
{
    class Program
    {
        static void Main(string[] args)
        {
            //上传文件的方法
            onload("D://outPut.txt");

            //下载文件的方法
            fload();
        }

        public static void onload(string file)
        {
            //构造一个web服务器的请求对象
            FtpWebRequest ftp;
           
            //实例化一个文件对象
            FileInfo f = new FileInfo(file);
            ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://192.168.0.150/" + f.Name));
           
            //创建用户名和密码
            ftp.Credentials = new NetworkCredential("123", "123");
            ftp.KeepAlive = false;
            ftp.Method = WebRequestMethods.Ftp.UploadFile;
            ftp.UseBinary = true;
            ftp.ContentLength = f.Length;      
            int buffLength = 20480;
            byte[] buff = new byte[buffLength];
            int contentLen;

            try
            {
                //获得请求对象的输入流
                FileStream fs = f.OpenRead();
                Stream sw = ftp.GetRequestStream();
                contentLen = fs.Read(buff, 0, buffLength);
                while (contentLen != 0)
                {
                    sw.Write(buff, 0, contentLen);
                    contentLen = fs.Read(buff, 0, buffLength);
                }
                sw.Close();
                fs.Close();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
        }

        public static  void  fload()
        {
            FtpWebRequest ftp;
            ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://192.168.0.6/连接到你指定的文件"));

            //指定用户名和密码
            ftp.Credentials = new NetworkCredential("123", "123456");
            WebResponse wr = ftp.GetResponse();
            StreamReader sr = new StreamReader(wr.GetResponseStream(),System.Text.Encoding.Default);
            string s = sr.ReadLine();
            while(s.Equals(""))
            {
                s = sr.ReadLine();
            }
        }
    }
}