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   源码介绍

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用的c#写的ftp服务器的上传和下载功能自己写的供各位参考

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.IO;
using System.Net;

namespace FTP_客户端
{
    public partial class Form1 : Form
    {
        FtpWebRequest request;
        FtpWebResponse response;

        string fileName = "";
        StreamReader reader;

        string mFileName = "";

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            //选择文件

            try
            {
                openFileDialog1.FileName = "";
                if (openFileDialog1.ShowDialog() == DialogResult.Cancel)
                {
                    return;
                }
                else
                {
                    fileName = openFileDialog1.SafeFileName;
                    textBox1.Text = openFileDialog1.FileName;
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("选择文件失败："   ex.Message, "错误");
                return;
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            //查询

            try
            {
                listBox1.Items.Clear();
                request = (FtpWebRequest)WebRequest.Create("ftp://"   textBox2.Text.Trim()   "/");
                request.Method = WebRequestMethods.Ftp.ListDirectory;
                request.Credentials = new NetworkCredential(textBox3.Text.Trim(), textBox4.Text.Trim());
                response = (FtpWebResponse)request.GetResponse();
                reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding("gb2312"));
                string filelist = reader.ReadToEnd();
                string[] list = filelist.Split(new char[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
                foreach (string i in list)
                {
                    listBox1.Items.Add(i);
                }
                reader.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show("查询服务器文件失败："   ex.Message, "错误");
                return;
            }
 
        }

        private void button3_Click(object sender, EventArgs e)
        {
            //上传文件

            //try
            //{
            //    if (fileName == "")
            //    {
            //        MessageBox.Show("请选择需要上传的文件！", "提示");
            //        return;
            //    }

            //    if (listBox1.Items.Contains(fileName) == true)
            //    {
            //        if (MessageBox.Show("服务器上已经存在 ["   fileName   "] 文件，点击确定覆盖", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.Cancel)
            //        {
            //            return;
            //        }
            //    }
            //    request = (FtpWebRequest)WebRequest.Create("ftp://"   textBox2.Text.Trim()   "/"   fileName);
            //    request.Method = WebRequestMethods.Ftp.UploadFile;
            //    request.Credentials = new NetworkCredential(textBox3.Text.Trim(), textBox4.Text.Trim());

            //    //reader = new StreamReader(fileName);
            //    reader = new StreamReader(textBox1.Text.Trim(), Encoding.GetEncoding("gb2312"));
            //    byte[] fileContents = Encoding.UTF8.GetBytes(reader.ReadToEnd());
            //    //byte[] fileContents = Encoding.GetEncoding("GB2312").GetBytes(reader.ReadToEnd());
            //    reader.Close();
            //    request.ContentLength = fileContents.Length;

            //    Stream requestStream = request.GetRequestStream();
            //    requestStream.Write(fileContents, 0, fileContents.Length);
            //    requestStream.Close();

            //    listBox1.Items.Clear();
            //    request = (FtpWebRequest)WebRequest.Create("ftp://"   textBox2.Text.Trim()   "/");
            //    request.Method = WebRequestMethods.Ftp.ListDirectory;
            //    request.Credentials = new NetworkCredential(textBox3.Text.Trim(), textBox4.Text.Trim());
            //    response = (FtpWebResponse)request.GetResponse();
            //    reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding("gb2312"));
            //    string filelist = reader.ReadToEnd();
            //    string[] list = filelist.Split(new char[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
            //    foreach (string i in list)
            //    {
            //        listBox1.Items.Add(i);
            //    }
            //    reader.Close();
            //    MessageBox.Show("文件 ["   fileName   "] 上传完毕！", "提示");
            //}
            //catch (Exception ex)
            //{
            //    MessageBox.Show("上传文件失败："   ex.Message, "错误");
            //    return;
            //}

            //***************************以下方法采用类的方式***********************************************

            UpLoadFile(textBox1.Text.Trim());

            //**********************************************************************************************
        }

        private void UpLoadFile(string FileName)
        {
            try
            {
                FTP_Client ftp = new FTP_Client();
                ftp.setRemoteHost("10.20.30.126");
                ftp.login();

                //try
                //{
                //    ftp.mkdir("/"   sFtpPath);
                //}
                //catch { };
                //ftp.chdir("/aa");

                ftp.upload(FileName);
                ftp.close();

                MessageBox.Show("文件 ["   FileName   "] 上传完毕！", "提示");
            }
            catch (Exception ex)
            {
                MessageBox.Show("上传文件失败："   ex.Message, "错误");
                return;
            }
        }

        private void button4_Click(object sender, EventArgs e)
        {
            //下载文件

            try
            {
                if (listBox1.SelectedItem == null)
                {
                    MessageBox.Show("请选择一个文件！","提示");
                    return;
                }
                fileName = listBox1.SelectedItem.ToString();
                string url = "D:/FTP/"   fileName;
                if (File.Exists(url))
                {
                    if (MessageBox.Show("本地已经存在 ["   fileName   "] 文件，点击确定覆盖。", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.Cancel)
                    {
                        return;
                    }
                }
                request = (FtpWebRequest)WebRequest.Create("ftp://"   textBox2.Text.Trim()   "/"   fileName);
                request.Method = WebRequestMethods.Ftp.DownloadFile;
                request.Credentials = new NetworkCredential(textBox3.Text.Trim(), textBox4.Text.Trim());
                response = (FtpWebResponse)request.GetResponse();
                Stream responseStream = response.GetResponseStream();
                reader = new StreamReader(responseStream, Encoding.GetEncoding("gb2312"));
                StreamWriter writer = new StreamWriter(url);
                writer.Write(reader.ReadToEnd());
                writer.Close();
                reader.Close();
                MessageBox.Show("文件 ["   fileName   "] 下载完毕！","提示");
            }
            catch (Exception ex)
            {
                MessageBox.Show("下载文件失败："   ex.Message,"错误");
                return;
            }
        }

        private void button6_Click(object sender, EventArgs e)
        {
            //截屏

            System.Threading.Thread.Sleep(200);
            Bitmap bit = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
            Graphics g = Graphics.FromImage(bit);
            g.CopyFromScreen(new Point(0, 0), new Point(0, 0), bit.Size);

            //SaveFileDialog saveFileDialog = new SaveFileDialog();
            //saveFileDialog.Filter = "bmp|*.bmp|jpg|*.jpg|gif|*.gif";

            //if (saveFileDialog.ShowDialog() != DialogResult.Cancel)
            //{
            //    bit.Save(saveFileDialog.FileName);
            //}

            mFileName = "D:/System/"   DateTime.Now.ToString("yyyyMMddHHmmss")   ".jpg";
            bit.Save(mFileName);
            g.Dispose();

            //截取活动窗体

            //Bitmap bit = new Bitmap(this.Width, this.Height);
            //Graphics g = Graphics.FromImage(bit);
            //g.CopyFromScreen(this.Location, new Point(0, 0), bit.Size);
            //SaveFileDialog saveFileDialog = new SaveFileDialog();
            //saveFileDialog.Filter = "bmp|*.bmp|jpg|*.jpg|gif|*.gif";
            //if (saveFileDialog.ShowDialog() != DialogResult.Cancel)
            //{
            //    bit.Save(saveFileDialog.FileName);
            //}
            //g.Dispose();
            
        }

        private void button7_Click(object sender, EventArgs e)
        {
            //发送

            UpLoadFile(mFileName);
        }

        private void button5_Click(object sender, EventArgs e)
        {
            //关闭

            Application.Exit();
        }

    }
}