form1.cs

ftp连接程序

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Net;

namespace FtpWebLink
{
    public partial class Form1 : Form
    {
        private string serverFileDirectory;
        public Form1()
        {
            InitializeComponent();
        }
        private void FillDirectoryList(Stream strem)
        {
            StreamReader reader = new StreamReader(strem);
            string content = reader.ReadToEnd();
            string[] files = content.Split('\n');
            listBox1.DataSource = files;
            reader.Close();
        }

        private void buttonLink_Click(object sender, EventArgs e)
        {
            Cursor currentcursor = this.Cursor;
            FtpWebResponse response = null;
            Stream stream=null;
            try
            {
                this.Cursor = Cursors.WaitCursor;
                FtpWebRequest request = (FtpWebRequest)WebRequest.Create(textBoxServer.Text);
                request.Credentials = new NetworkCredential(textBoxUser.Text, textBoxpassword.Text);
                request.Method = WebRequestMethods.Ftp.ListDirectory;
                response = (FtpWebResponse)request.GetResponse();
                stream = response.GetResponseStream();
                FillDirectoryList(stream);
                serverFileDirectory = null;
                buttonOpemDirect.Enabled = false;
                buttonFileDown.Enabled = false;

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "error ftp client", 
                    MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            finally
            {
                if (response != null)
                    response.Close();
                if (stream != null)
                    stream.Close();
                this.Cursor = currentcursor;
            }
           
            
        }

        private void buttonOpemDirect_Click(object sender, EventArgs e)
        {
            FtpWebResponse response = null;
            Stream stream = null;
            try
            {
                string subdirectory = listBox1.SelectedValue.ToString().Trim();
                //serverDirectory = textBoxServer.Text.ToString();
                serverFileDirectory += "/" + subdirectory;
                Uri baseuri = new Uri(textBoxServer.Text);
                Uri uri = new Uri(baseuri, serverFileDirectory);
                FtpWebRequest request = (FtpWebRequest)WebRequest.Create(uri);
                request.Credentials = new NetworkCredential(textBoxUser.Text, textBoxpassword.Text);
                request.Method = WebRequestMethods.Ftp.ListDirectory;
                response = (FtpWebResponse)request.GetResponse();
                stream = response.GetResponseStream();
                FillDirectoryList(stream);
                
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Error Ftp Client", 
                    MessageBoxButtons.OK, MessageBoxIcon.Error);
                
            }
            finally
            {
                if (response != null)
                    response.Close();
                if (stream != null)
                    stream.Close();
            }
        }

        
        private void buttonFileDown_Click(object sender, EventArgs e)
        {
            FtpWebResponse response = null;
            Stream Instream = null;
            Stream Outsteam = null;
            try
            {
                Uri baseu = new Uri(textBoxServer.Text);
                string filename = listBox1.SelectedValue.ToString().Trim();
                //string fullFileName = serverFileDirectory + @"/" + filename;
                string fullFileName =  @"/" + filename;
                Uri uri = new Uri(baseu, fullFileName);
                FtpWebRequest request = (FtpWebRequest)WebRequest.Create(uri);
                request.Credentials=new NetworkCredential(textBoxUser.Text,textBoxpassword.Text);
                request.Method=WebRequestMethods.Ftp.DownloadFile;
                request.UseBinary = checkBox1.Checked;
                response = (FtpWebResponse)request.GetResponse();
                Instream = response.GetResponseStream();
                
                //string locafilename = "d:/"+fullFileName;
                saveFileDialog1.Filter="所有文件(*.*)|*.*|文本文件(.txt)|*.txt";

                if (saveFileDialog1.ShowDialog() == DialogResult.OK)
                {
                    Outsteam = File.OpenWrite(saveFileDialog1.FileName);
                    //Outsteam = File.OpenWrite(locafilename);
                    byte[] buffer = new byte[4096];
                    int size = 0;
                    while ((size = Instream.Read(buffer, 0, 4096)) > 0)
                    {
                        Outsteam.Write(buffer, 0, size);
                    }
                    
                }

            }
            catch (System.Exception ex)
            {
                MessageBox.Show(ex.Message, "Error Ftp Client",
                    MessageBoxButtons.OK, MessageBoxIcon.Error);
             }
            finally
            {
                if (response != null)
                    response.Close();
                if (Instream != null)
                    Instream.Close();
                if (Outsteam != null)
                    Outsteam.Close();
            }

        }

        private void listBox1_SelectedIndex(object sender, EventArgs e)
        {
            this.buttonFileDown.Enabled = true;
            this.buttonOpemDirect.Enabled = true;
        }

             
       
    }
}