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【CSharp】 ftp类
作者:Dezai.CN / 发布于2013/6/13/ 625

	using System.Net;
	using System.Text;
	using System;
	using System.IO;
	public class FtpFile
	{
	 string ftpServerIP;
	 public string FtpServerIP
	 {
	 get { return ftpServerIP; }
	 set { ftpServerIP = value; }
	 }
	 string ftpUserID;
	 public string FtpUserID
	 {
	 get { return ftpUserID; }
	 set { ftpUserID = value; }
	 }
	 string ftpPassword;
	 public string FtpPassword
	 {
	 get { return ftpPassword; }
	 set { ftpPassword = value; }
	 }
	 FtpWebRequest reqFTP;
	 public static string FtpServer = System.Configuration.ConfigurationSettings.AppSettings["FtpServer"];
	 public static string FtpUser = System.Configuration.ConfigurationSettings.AppSettings["FtpUser"];
	 public static string FtpPwd = System.Configuration.ConfigurationSettings.AppSettings["FtpPwd"];
	 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 FtpFile(string ftpServerIP, string ftpUserID, string ftpPassword)
	 {
	 this.ftpServerIP = ftpServerIP;
	 this.ftpUserID = ftpUserID;
	 this.ftpPassword = ftpPassword;
	 }
	 public FtpFile()
	 {
	 this.ftpServerIP = FtpServer;
	 this.ftpUserID = FtpUser;
	 this.ftpPassword = FtpPwd;
	 }
	 //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.UTF8);//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 string Upload(string filedir,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 + filedir + 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*5;
	 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();
	 return "";
	 }
	 catch (Exception ex)
	 {
	 return "Upload Error" + ex.Message;
	 }
	 }
	 /// <summary>
	 /// 下载文件
	 /// </summary>
	 /// <param name="filedir">文件夹地址：必须是服务器根级相对地址，比如"/ftpFiles/images"</param>
	 /// <param name="filePath">下载文件新路径，但不包含文件名，如：D:\Photo</param>
	 /// <param name="fileName">ftp文件绝对路径,如:ftp://127.0.0.1/Photo/1.bmp</param>
	 /// <returns></returns>
	 public string Download(string filedir,string filePath, string fileName) ////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))
	 {
	 return "本地文件" + newFileName + "已存在,无法下载";
	 }
	 string url = "ftp://" + ftpServerIP + filedir + onlyFileName;
	 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*5;
	 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();
	 return "";
	 }
	 catch (Exception ex)
	 {
	 return "因" + ex.Message + ",无法下载";
	 }
	 }
	 //删除文件
	 public void DeleteFileName(string filedir,string fileName)
	 {
	 try
	 {
	 string fName= Path.GetFileName(fileName);
	 string uri = "ftp://" + ftpServerIP + filedir+fName;
	 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 string 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();
	 return "";
	 }
	 catch (WebException ex)
	 {
	 return "[Make Dir]" + 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);
	 }
	}
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