C# winfrom simulates ftp file management implementation code

using System; 
using System.Collections.Generic; 
using System.Text; 
using System.Net; 
using System.IO; 
using System.Windows.Forms;

 
namespace ConvertData
{
    class FtpUpDown
    {

        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 FtpUpDown(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); 
        }

    }
}

private void button1_Click(object sender, EventArgs e)//文件上传
        {
            FtpUpDown ftpUpDown = new FtpUpDown("192.168.2.130:21", "wl","123456");
            ftpUpDown.Upload("E:\\other.rar");   
        }
 private void button3_Click(object sender, EventArgs e)//修改
        {
            FtpUpDown ftpUpDown = new FtpUpDown("192.168.2.130:21", "wl", "123456");
            ftpUpDown.Rename("张三", "李四");
        }
 private void button4_Click(object sender, EventArgs e)//删除
        {
            FtpUpDown ftpUpDown = new FtpUpDown("192.168.2.130:21", "wl", "123456");
            ftpUpDown.delDir("张三");
        }
 private void button2_Click(object sender, EventArgs e)//添加
        {
            FtpUpDown ftpUpDown = new FtpUpDown("192.168.2.130:21", "wl", "123456");
            ftpUpDown.MakeDir(this.TxT_name.Text);
        }

 
//获得ftp文件的文件明晰，还为处理，能够获得所有的文件名称
 FtpUpDown ftpUpDown = new FtpUpDown("192.168.2.130", "wl", "123456");
            string[] str = ftpUpDown.GetFilesDetailList();
            int i = 1;
            foreach (string item in str)
            {
                string[] name = item.Split(' ');
                TxT_name.Text += name[name.Length - 1] + ";";
                i++;
            }
            label1.Text = i.ToString();