最近做了一个项目，需要读取ftp服务器上的文件，于是参考了网上提供的一些帮组方法，使用过程中，出现一些小细节问题，于是本人做了一些修改，拿来分享一下
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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Net; using System.IO; using System.Threading;using System.Configuration; namespace FtpSyn { public class FtpHelper { //基本设置 ftp://400:ZOina2017@192.168.10.17/400backup static private string path = @"ftp://" + ConfigurationManager.AppSettings["FtpServerIP"].ToString() + "/"; //目标路径 static private string ftpip = ConfigurationManager.AppSettings["FtpServerIP"].ToString(); //ftp IP地址 static private string username = ConfigurationManager.AppSettings["FtpUserName"].ToString(); //ftp用户名 static private string password = ConfigurationManager.AppSettings["FtpPassWord"].ToString(); //ftp密码 //获取ftp上面的文件和文件夹 public static string[] GetFileList(string dir) { string[] downloadFiles; StringBuilder result = new StringBuilder(); FtpWebRequest request; try { request = (FtpWebRequest)FtpWebRequest.Create(new Uri(path + dir)); request.UseBinary = true; request.Credentials = new NetworkCredential(username, password);//设置用户名和密码 request.Method = WebRequestMethods.Ftp.ListDirectory; request.UseBinary = true; request.UsePassive = false; //选择主动还是被动模式 , 这句要加上的。 request.KeepAlive = false;//一定要设置此属性，否则一次性下载多个文件的时候，会出现异常。 WebResponse response = request.GetResponse(); StreamReader reader = new StreamReader(response.GetResponseStream()); string 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) { LogHelper.writeErrorLog("获取ftp上面的文件和文件夹：" + ex.Message); downloadFiles = null; return downloadFiles; } } /// <summary> /// 从ftp服务器上获取文件并将内容全部转换成string返回 /// </summary> /// <param name="fileName"></param> /// <param name="dir"></param> /// <returns></returns> public static string GetFileStr(string fileName, string dir) { FtpWebRequest reqFTP; try { reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(path + dir + "/" + fileName)); reqFTP.Method = WebRequestMethods.Ftp.DownloadFile; reqFTP.UseBinary = true; reqFTP.Credentials = new NetworkCredential(username, password); reqFTP.UsePassive = false; //选择主动还是被动模式 , 这句要加上的。 reqFTP.KeepAlive = false;//一定要设置此属性，否则一次性下载多个文件的时候，会出现异常。 FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse(); Stream ftpStream = response.GetResponseStream(); StreamReader reader = new StreamReader(ftpStream); string fileStr = reader.ReadToEnd(); reader.Close(); ftpStream.Close(); response.Close(); return fileStr; } catch (Exception ex) { LogHelper.writeErrorLog("获取ftp文件并读取内容失败：" + ex.Message); return null; } } /// <summary> /// 获取文件大小 /// </summary> /// <param name="file">ip服务器下的相对路径</param> /// <returns>文件大小</returns> public static int GetFileSize(string file) { StringBuilder result = new StringBuilder(); FtpWebRequest request; try { request = (FtpWebRequest)FtpWebRequest.Create(new Uri(path + file)); request.UseBinary = true; request.Credentials = new NetworkCredential(username, password);//设置用户名和密码 request.Method = WebRequestMethods.Ftp.GetFileSize; int dataLength = (int)request.GetResponse().ContentLength; return dataLength; } catch (Exception ex) { Console.WriteLine("获取文件大小出错：" + ex.Message); return -1; } } /// <summary> /// 文件上传 /// </summary> /// <param name="filePath">原路径（绝对路径）包括文件名</param> /// <param name="objPath">目标文件夹：服务器下的相对路径 不填为根目录</param> public static void FileUpLoad(string filePath,string objPath="") { try { string url = path; if(objPath!="") url += objPath + "/"; try { FtpWebRequest reqFTP = null; //待上传的文件 （全路径） try { FileInfo fileInfo = new FileInfo(filePath); using (FileStream fs = fileInfo.OpenRead()) { long length = fs.Length; reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(url + fileInfo.Name)); //设置连接到FTP的帐号密码 reqFTP.Credentials = new NetworkCredential(username, password); //设置请求完成后是否保持连接 reqFTP.KeepAlive = false; //指定执行命令 reqFTP.Method = WebRequestMethods.Ftp.UploadFile; //指定数据传输类型 reqFTP.UseBinary = true; using (Stream stream = reqFTP.GetRequestStream()) { //设置缓冲大小 int BufferLength = 5120; byte[] b = new byte[BufferLength]; int i; while ((i = fs.Read(b, 0, BufferLength)) > 0) { stream.Write(b, 0, i); } Console.WriteLine("上传文件成功"); } } } catch (Exception ex) { Console.WriteLine("上传文件失败错误为" + ex.Message); } finally { } } catch (Exception ex) { Console.WriteLine("上传文件失败错误为" + ex.Message); } finally { } } catch (Exception ex) { Console.WriteLine("上传文件失败错误为" + ex.Message); } } /// <summary> /// 删除文件 /// </summary> /// <param name="fileName">服务器下的相对路径 包括文件名</param> public static void DeleteFileName(string fileName) { try { FileInfo fileInf = new FileInfo(ftpip +""+ fileName); string uri = path + fileName; FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri)); // 指定数据传输类型 reqFTP.UseBinary = true; // ftp用户名和密码 reqFTP.Credentials = new NetworkCredential(username, password); // 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("删除文件出错：" + ex.Message); } } /// <summary> /// 新建目录 上一级必须先存在 /// </summary> /// <param name="dirName">服务器下的相对路径</param> public static void MakeDir(string dirName) { try { string uri = path + dirName; FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri)); // 指定数据传输类型 reqFTP.UseBinary = true; // ftp用户名和密码 reqFTP.Credentials = new NetworkCredential(username, password); reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory; FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse(); response.Close(); } catch (Exception ex) { Console.WriteLine("创建目录出错：" + ex.Message); } } /// <summary> /// 删除目录 上一级必须先存在 /// </summary> /// <param name="dirName">服务器下的相对路径</param> public static void DelDir(string dirName) { try { string uri = path + dirName; FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri)); // ftp用户名和密码 reqFTP.Credentials = new NetworkCredential(username, password); reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory; FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse(); response.Close(); } catch (Exception ex) { Console.WriteLine("删除目录出错：" + ex.Message); } } /// <summary> /// 从ftp服务器上获得文件夹列表 /// </summary> /// <param name="RequedstPath">服务器下的相对路径</param> /// <returns></returns> public static List<string> GetDirctory(string RequedstPath) { List<string> strs = new List<string>(); try { string uri = path + RequedstPath; //目标路径 path为服务器地址 FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri)); // ftp用户名和密码 reqFTP.Credentials = new NetworkCredential(username, password); reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails; WebResponse response = reqFTP.GetResponse(); StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名 string line = reader.ReadLine(); while (line != null) { if (line.Contains("<DIR>")) { string msg = line.Substring(line.LastIndexOf("<DIR>")+5).Trim(); strs.Add(msg); } line = reader.ReadLine(); } reader.Close(); response.Close(); return strs; } catch (Exception ex) { Console.WriteLine("获取目录出错：" + ex.Message); } return strs; } /// <summary> /// 从ftp服务器上获得文件列表 /// </summary> /// <param name="RequedstPath">服务器下的相对路径</param> /// <returns></returns> public static List<string> GetFile(string RequedstPath) { List<string> strs = new List<string>(); try { string uri = path + RequedstPath; //目标路径 path为服务器地址 FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri)); // ftp用户名和密码 reqFTP.Credentials = new NetworkCredential(username, password); reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails; WebResponse response = reqFTP.GetResponse(); StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名 string line = reader.ReadLine(); while (line != null) { if (!line.Contains("<DIR>")) { string msg = line.Substring(39).Trim(); strs.Add(msg); } line = reader.ReadLine(); } reader.Close(); response.Close(); return strs; } catch (Exception ex) { Console.WriteLine("获取文件出错：" + ex.Message); } return strs; } } } |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
