使用.net FtpWebRequest 实现FTP常用功能

 

以下代码 使用.net  FtpWebRequest 实现FTP的常用功能， 代码已经调试通过， 可复制直接使用。 经测试使用此种方式实现的FTP操作与直接使用命令的方式操作FTP要稳定许多。 有设计不好的地方请指正。

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; ///

/// 连接FTP ///

/// FTP连接地址 /// 指定FTP连接成功后的当前目录, 如果不指定即默认为根目录 /// 用户名 /// 密码 public FtpWeb(string FtpServerIP, string FtpRemotePath, string FtpUserID, string FtpPassword) { ftpServerIP = FtpServerIP; ftpRemotePath = FtpRemotePath; ftpUserID = FtpUserID; ftpPassword = FtpPassword; ftpURI = "ftp://" + ftpServerIP + "/" + ftpRemotePath + "/"; } ///

/// 上传 ///

/// 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 --> " + ex.Message); } } ///

/// 下载 ///

/// /// public void Download(string filePath, string fileName) { FtpWebRequest reqFTP; try { FileStream outputStream = 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 --> " + ex.Message); } } ///

/// 删除文件 ///

/// 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 --> " + ex.Message + " 文件名:" + fileName); } } ///

/// 获取当前目录下明细(包含文件和文件夹) ///

/// 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"); line = reader.ReadLine(); } 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 --> " + ex.Message); return downloadFiles; } } ///

/// 获取当前目录下文件列表(仅文件) ///

/// 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() != "远程服务器返回错误: (550) 文件不可用(例如，未找到文件，无法访问文件)。") { Insert_Standard_ErrorLog.Insert("FtpWeb", "GetFileList Error --> " + ex.Message.ToString()); } return downloadFiles; } } ///

/// 获取当前目录下所有的文件夹列表(仅文件夹) ///

/// 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); } ///

/// 判断当前目录下指定的子目录是否存在 ///

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

/// 判断当前目录下指定的文件是否存在 ///

/// 远程文件名 public bool FileExist(string RemoteFileName) { string[] fileList = GetFileList("*.*"); foreach (string str in fileList) { if (str.Trim() == RemoteFileName.Trim()) { return true; } } return false; } ///

/// 创建文件夹 ///

/// 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 --> " + ex.Message); } } ///

/// 获取指定文件大小 ///

/// /// 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 --> " + 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 --> " + ex.Message); } } ///

/// 移动文件 ///

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

/// 切换当前目录 ///

/// /// true 绝对路径 false 相对路径 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 ) { } } }