使用asp.net FtpWebRequest 實現FTP常用功能

以下程式碼 使用.net  FtpWebRequest 實現FTP的常用功能， 程式碼已經除錯通過， 可複製直接使用。 經測試使用此種方式實現的FTP操作與直接使用命令的方式操作FTP要穩定許多。 有設計不好的地方請指正。

 

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

namespace FtpTest1
{

    public class FtpWeb
    {
        string ftpServerIP;
        string ftpRemotePath;
        string ftpUserID;
        string ftpPassword;
        string ftpURI;

        ///

        /// 連線FTP
        ///

        /// FTP連線地址
        /// 指定FTP連線成功後的當前目錄, 如果不指定即預設為根目錄
        /// 使用者名稱
        /// 密碼
        public FtpWeb(string FtpServerIP, string FtpRemotePath, string FtpUserID, string FtpPassword)
        {
            ftpServerIP = FtpServerIP;
            ftpRemotePath = FtpRemotePath;
            ftpUserID = FtpUserID;
            ftpPassword = FtpPassword;
            ftpURI = "ftp://" + ftpServerIP + "/" + ftpRemotePath + "/";
        }

        ///

        /// 上傳
        ///

        ///
        public void Upload(string filename)
        {
            FileInfo fileInf = new FileInfo(filename);
            string uri = ftpURI + fileInf.Name;
            FtpWebRequest reqFTP;

            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
            reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
            reqFTP.KeepAlive = false;
            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
            reqFTP.UseBinary = true;
            reqFTP.ContentLength = fileInf.Length;
            int buffLength = 2048;
            byte[] buff = new byte[buffLength];
            int contentLen;
            FileStream fs = fileInf.OpenRead();
            try
            {
                Stream strm = reqFTP.GetRequestStream();
                contentLen = fs.Read(buff, 0, buffLength);
                while (contentLen != 0)
                {
                    strm.Write(buff, 0, contentLen);
                    contentLen = fs.Read(buff, 0, buffLength);
                }
                strm.Close();
                fs.Close();
            }
            catch (Exception ex)
            {
                Insert_Standard_ErrorLog.Insert("FtpWeb", "Upload Error --&gt " + ex.Message);
            }
        }

        ///

        /// 下載
        ///

        ///
        ///
        public void Download(string filePath, string fileName)
        {
            FtpWebRequest reqFTP;
            try
            {
                FileStream utputStream = new FileStream(filePath + "\\" + fileName, FileMode.Create);

                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + fileName));
                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
                reqFTP.UseBinary = true;
                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);
                while (readCount > 0)
                {
                    outputStream.Write(buffer, 0, readCount);
                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                }

                ftpStream.Close();
                outputStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                Insert_Standard_ErrorLog.Insert("FtpWeb", "Download Error --&gt " + ex.Message);
            }
        }

        ///

        /// 刪除檔案
        ///

        ///
        public void Delete(string fileName)
        {
            try
            {
                string uri = ftpURI + fileName;
                FtpWebRequest reqFTP;
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));

                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                reqFTP.KeepAlive = false;
                reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;

                string result = String.Empty;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                long size = response.ContentLength;
                Stream datastream = response.GetResponseStream();
                StreamReader sr = new StreamReader(datastream);
                result = sr.ReadToEnd();
                sr.Close();
                datastream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                Insert_Standard_ErrorLog.Insert("FtpWeb", "Delete Error --&gt " + ex.Message + "  檔名:" + fileName);
            }
        }

        ///

        /// 獲取當前目錄下明細(包含檔案和資料夾)
        ///

        ///
        public string[] GetFilesDetailList()
        {
            string[] downloadFiles;
            try
            {
                StringBuilder result = new StringBuilder();
                FtpWebRequest ftp;
                ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI));
                ftp.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                ftp.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                WebResponse response = ftp.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream());
                string line = reader.ReadLine();
                line = reader.ReadLine();
                line = reader.ReadLine();
                while (line != null)
                {
                    result.Append(line);
                    result.Append("\n");

 result.Remove(result.ToString().LastIndexOf("\n"), 1);
                reader.Close();
                response.Close();
                return result.ToString().Split('\n');
            }
            catch (Exception ex)
            {
                downloadFiles = null;
                Insert_Standard_ErrorLog.Insert("FtpWeb", "GetFilesDetailList Error --&gt " + ex.Message);
                return downloadFiles;
            }
        }     

        ///

        /// 獲取當前目錄下檔案列表(僅檔案)
        ///

        ///
        public string[] GetFileList(string mask)
        {
            string[] downloadFiles;
            StringBuilder result = new StringBuilder();
            FtpWebRequest reqFTP;
            try
            {
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI));
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
                WebResponse response = reqFTP.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream());

                string line = reader.ReadLine();
                while (line != null)
                {
                    if (mask.Trim() != string.Empty && mask.Trim() != "*.*")
                    {
                        string mask_ = mask.Substring(0, mask.IndexOf("*"));
                        if (line.Substring(0, mask_.Length) == mask_)
                        {
                            result.Append(line);
                            result.Append("\n");
                        }
                    }
                    else
                    {
                        result.Append(line);
                        result.Append("\n");
                    }
                    line = reader.ReadLine();
                }
                result.Remove(result.ToString().LastIndexOf('\n'), 1);
                reader.Close();
                response.Close();
                return result.ToString().Split('\n');
            }
            catch (Exception ex)
            {
                downloadFiles = null;
                if (ex.Message.Trim() != "遠端伺服器返回錯誤: (550) 檔案不可用(例如，未找到檔案，無法訪問檔案)。")
                {
                    Insert_Standard_ErrorLog.Insert("FtpWeb", "GetFileList Error --&gt " + ex.Message.ToString());
                }
                return downloadFiles;
            }
        }

        ///

        /// 獲取當前目錄下所有的資料夾列表(僅資料夾)
        ///

  & nbsp;     ///
        public string[] GetDirectoryList()
        {
            string[] drectory = GetFilesDetailList();
            string m = string.Empty;
            foreach (string str in drectory)
            {
                if (str.Trim().Substring(0, 1).ToUpper() == "D")
                {
                    m += str.Substring(54).Trim() + "\n";
                }
            }

            char[] n = new char[]{'\n'};
            return m.Split(n);
        }
 
        ///

        /// 判斷當前目錄下指定的子目錄是否存在
        ///

        /// 指定的目錄名
        public bool DirectoryExist(string RemoteDirectoryName)
        {
            string[] dirList = GetDirectoryList();
            foreach (string str in dirList)
            {
                if (str.Trim() == RemoteDirectoryName.Trim())
                {
                    return true;
                }
            }
            return false;
        }

        ///

        /// 判斷當前目錄下指定的檔案是否存在
        ///

        /// 遠端檔名
        public bool FileExist(string RemoteFileName)
        {
            string[] fileList = GetFileList("*.*");
            foreach (string str in fileList)
            {
                if (str.Trim() == RemoteFileName.Trim())
                {
                    return true;
                }
            }
            return false;
        }

        ///

        /// 建立資料夾
        ///

        ///
        public void MakeDir(string dirName)
        {
            FtpWebRequest reqFTP;
            try
            {
                // dirName = name of the directory to create.
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + dirName));
                reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();

                ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                Insert_Standard_ErrorLog.Insert("FtpWeb", "MakeDir Error --&gt " + ex.Message);
            }
        }

        ///

        /// 獲取指定檔案大小
        ///

        ///
        ///
        public long GetFileSize(string filename)
        {
            FtpWebRequest reqFTP;
            long fileSize = 0;
            try
            {
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + filename));
                reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;

 

;     reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                fileSize = response.ContentLength;

                ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                Insert_Standard_ErrorLog.Insert("FtpWeb", "GetFileSize Error --&gt " + ex.Message);
            }
            return fileSize;
        }

        ///

        /// 改名
        ///

        ///
        ///
        public void ReName(string currentFilename, string newFilename)
        {
            FtpWebRequest reqFTP;
            try
            {
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + currentFilename));
                reqFTP.Method = WebRequestMethods.Ftp.Rename;
                reqFTP.RenameTo = newFilename;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();

                ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                Insert_Standard_ErrorLog.Insert("FtpWeb", "ReName Error --&gt " + ex.Message);
            }
        }

        ///

        /// 移動檔案
        ///

        ///
        ///
        public void MovieFile(string currentFilename, string newDirectory)
        {
            ReName(currentFilename, newDirectory);
        }

        ///

        /// 切換當前目錄
        ///

        ///
        /// true 絕對路徑   false 相對路徑
        public void GotoDirectory(string DirectoryName, bool IsRoot)
        {
            if (IsRoot)
            {
                ftpRemotePath = DirectoryName;
            }
            else
            {
                ftpRemotePath += DirectoryName + "/";
            }
            ftpURI = "ftp://" + ftpServerIP + "/" + ftpRemotePath + "/";
        }

    }

    public class Insert_Standard_ErrorLog
    {
        public static void Insert(string x, string y )
        {

        }
    }
  

}

來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/12639172/viewspace-626545/，如需轉載，請註明出處，否則將追究法律責任。