C# FTP功能实现（转载）

ftp功能实现代码

using System;
using System.Configuration;
using System.Collections.Generic; 
using System.Text; 
using System.Net; 
using System.IO;

namespace Wind.Riskfile.Report
{ 
    class FtpProc 
    { 
        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 FtpProc() 
        {           
            this.ftpServerIP = ConfigurationManager.AppSettings["ReportFTPUrl"];
            this.ftpUserID = ConfigurationManager.AppSettings["ReportUserName"];
            this.ftpPassword = ConfigurationManager.AppSettings["ReportPassWord"];          
        }
        public FtpProc(string ftpServerIP, string ftpUserID, string ftpPassword)
        {
            this.ftpServerIP = ftpServerIP;
            this.ftpUserID = ftpUserID;
            this.ftpPassword = ftpPassword;
        } 
        //获取文件列表
        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(" "); 
                    line = reader.ReadLine(); 
                } 
                // to remove the trailing ' ' 
                result.Remove(result.ToString().LastIndexOf(' '), 1); 
                reader.Close(); 
                response.Close(); 
                return result.ToString().Split(' '); 
            } 
            catch (Exception ex) 
            { 
                Console.WriteLine(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( 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( 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 =  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) 
            { 
                Console.WriteLine(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 = 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; 
            } 
        }
        /**//// <summary>
        /// 删除文件 
        /// </summary>
        /// <param name="ftpUri"></param>
        /// <returns></returns>
        public bool DeleteFile(string ftpUri)
        {
            Uri serverUri = new Uri(ftpUri);
            if (serverUri.Scheme != Uri.UriSchemeFtp)
            {
                return false;
            }
            // Get the object used to communicate with the server.
            FtpWebRequest request = (FtpWebRequest)WebRequest.Create(serverUri);
            request.Method = WebRequestMethods.Ftp.DeleteFile;

            FtpWebResponse response = (FtpWebResponse)request.GetResponse();
            Console.WriteLine("Delete status: {0}", response.StatusDescription);
            response.Close();
            return true;
        }
        //删除文件 
        public void DeleteFileName(string fileName) 
        { 
            try 
            { 
                FileInfo fileInf = new FileInfo(fileName); 
                string uri = 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) 
            { 
                Console.WriteLine(ex.Message, "删除错误"); 
            } 
        } 

        //创建目录 
        public void MakeDir(string dirName) 
        { 
            try 
            { 
                string uri = ftpServerIP + "/" + dirName; 
                Connect(uri);//连接      
                reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory; 
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse(); 
                response.Close(); 
            } 
            catch (Exception ex) 
            { 
                Console.WriteLine(ex.Message); 
            } 
        } 

        //删除目录 
        public void delDir(string dirName) 
        { 
            try 
            { 
                string uri = ftpServerIP + "/" + dirName; 
                Connect(uri);//连接      
                reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory; 
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse(); 
                response.Close(); 
            } 
            catch (Exception ex) 
            { 
                Console.WriteLine(ex.Message); 
            } 
        } 

        //获得文件大小 
        public long GetFileSize(string filename) 
        { 
            long fileSize = 0; 
            try 
            { 
                string uri = ftpServerIP + "/" + filename; 
                Connect(uri);//连接      
                reqFTP.Method = WebRequestMethods.Ftp.GetFileSize; 
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse(); 
                fileSize = response.ContentLength; 
                response.Close(); 
            } 
            catch (Exception ex) 
            { 
                Console.WriteLine(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;
                string uri = ftpServerIP + "/" + currentFilename;
                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) 
            { 
                Console.WriteLine(ex.Message); 
            } 
        } 

        //获得文件明晰 
        public string[] GetFilesDetailList() 
        { 
            return GetFileList(ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectoryDetails); 
        } 
        //获得文件明晰 
        public string[] GetFilesDetailList(string path) 
        { 
            return GetFileList(ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectoryDetails); 
        } 
    }
}