FTP file management

public static class FtpHelper { //基本设置 private const string Path = @"ftp://192.168.253.4:21/"; //目标路径 private const string Ftpip = "192.168.253.4"; // GetAppConfig("obj"); //ftp IP地址 private const string Username = "stone"; //GetAppConfig("username"); //ftp用户名 private const string Password = "111111"; //GetAppConfig("password"); //ftp密码 // 2M 可能不够 private const int bufferSize = 2048; /// 
 /// 获取自定义配置的值 /// 
 /// 键值 /// 键值对应的值 public static string GetAppConfig(string strKey) { foreach (string key in ConfigurationManager.AppSettings) { if (key == strKey) { return ConfigurationManager.AppSettings[strKey]; } } return null; } //获取ftp上面的文件和文件夹 public static string[] GetFileList(string dir) { var result = new StringBuilder(); try { var ftpRequest = FtpRequest(Path, WebRequestMethods.Ftp.ListDirectory); WebResponse response = ftpRequest.GetResponse(); var reader = new StreamReader(response.GetResponseStream()); string line = reader.ReadLine(); while (line != null) { result.Append(line); result.Append("\n"); Console.WriteLine(line); 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) { Console.WriteLine("获取ftp上面的文件和文件夹：" + ex.Message); return new[] {""}; } } /// 
 /// 获取文件大小 /// 
 /// ip服务器下的相对路径 /// 文件大小 public static int GetFileSize(string file) { var result = new StringBuilder(); FtpWebRequest request; try { request = (FtpWebRequest) WebRequest.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; var dataLength = (int) request.GetResponse().ContentLength; return dataLength; } catch (Exception ex) { Console.WriteLine("获取文件大小出错：" + ex.Message); return -1; } } /// 
 /// 文件上传 /// 
 /// 原路径（绝对路径）包括文件名 /// 目标文件夹：服务器下的相对路径 不填为根目录 public static bool UpLoad(string localFile, string remoteFile = "") { try { string url = Path; if (remoteFile != "") url += remoteFile + "/"; try { //待上传的文件 （全路径） try { var fileInfo = new FileInfo(localFile); using (FileStream fs = fileInfo.OpenRead()) { long length = fs.Length; FtpWebRequest reqFtp = FtpRequest(url + fileInfo.Name,WebRequestMethods.Ftp.UploadFile); using (Stream stream = reqFtp.GetRequestStream()) { //设置缓冲大小 int BufferLength = 5120; var 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"); return true; } } } 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); } return false; } public static bool UpLoad(Stream localFileStream, string remoteFile) { bool result = true; try { var ftpRequest = FtpRequest(Path + remoteFile, WebRequestMethods.Ftp.UploadFile); var ftpStream = ftpRequest.GetRequestStream(); var byteBuffer = new byte[bufferSize]; int bytesSent = localFileStream.Read(byteBuffer, 0, bufferSize); try { while (bytesSent != 0) { ftpStream.Write(byteBuffer, 0, bytesSent); bytesSent = localFileStream.Read(byteBuffer, 0, bufferSize); } } catch (Exception ex) { Console.WriteLine(ex.ToString()); result = false; } localFileStream.Close(); ftpStream.Close(); } catch (Exception ex) { Console.WriteLine(ex.ToString()); result = false; } return result; } public static FtpWebRequest FtpRequest(string requstUrl,string method,bool closedResponse=false) { var reqFtp = (FtpWebRequest) WebRequest.Create(new Uri(requstUrl)); //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 = method; //指定数据传输类型 reqFtp.UseBinary = true; if (closedResponse) { var resp=reqFtp.GetResponse(); resp.Close(); } return reqFtp; } /// 
 /// 下载 /// 
 /// 目的位置 /// 服务器相对位置 ///  public static bool Download(string localFile,string remoteFile) { bool check = true; try { var outputStream = new FileStream(localFile, FileMode.Create); var ftpRequest = FtpRequest(Path + remoteFile, WebRequestMethods.Ftp.DownloadFile); var response = (FtpWebResponse)ftpRequest.GetResponse(); Stream ftpStream = response.GetResponseStream(); long cl = response.ContentLength; int bufferSize = 2048; int readCount; var 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 err) { check = false; } return check; } public static Stream Download(string remoteFile) { var ftpRequest = FtpRequest(Path + remoteFile, WebRequestMethods.Ftp.DownloadFile); var response = (FtpWebResponse)ftpRequest.GetResponse(); Stream ftpStream = response.GetResponseStream(); return ftpStream; } /// 
 /// 删除文件 /// 
 /// 服务器下的相对路径 包括文件名 public static void DeleteFileName(string fileName) { try { FtpRequest(Path + fileName, WebRequestMethods.Ftp.DeleteFile,true); } catch (Exception ex) { Console.WriteLine("删除文件出错：" + ex.Message); } } /// 
 /// 新建目录 上一级必须先存在 /// 
 /// 服务器下的相对路径 public static void MakeDir(string dirName) { try { FtpRequest(Path + dirName, WebRequestMethods.Ftp.MakeDirectory, true); } catch (Exception ex) { Console.WriteLine("创建目录出错：" + ex.Message); } } /// 
 /// 删除目录 上一级必须先存在 /// 
 /// 服务器下的相对路径 public static void DelDir(string dirName) { try { FtpRequest(Path + dirName, WebRequestMethods.Ftp.RemoveDirectory,true); } catch (Exception ex) { Console.WriteLine("删除目录出错：" + ex.Message); } } /// 
 /// 从ftp服务器上获得文件夹列表 /// 
 /// 服务器下的相对路径 ///  public static List GetDirctory(string requedstPath) { var strs = new List(); try { var reqFtp = FtpRequest(Path + requedstPath, WebRequestMethods.Ftp.ListDirectoryDetails); WebResponse response = reqFtp.GetResponse(); var reader = new StreamReader(response.GetResponseStream()); //中文文件名 string line = reader.ReadLine(); while (line != null) { if (line.Contains("")) { string msg = line.Substring(line.LastIndexOf("") + 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; } /// 
 /// 从ftp服务器上获得文件列表 /// 
 /// 服务器下的相对路径 ///  public static List GetFile(string requedstPath) { var strs = new List(); try { var reqFtp = FtpRequest(Path + requedstPath, WebRequestMethods.Ftp.ListDirectoryDetails); WebResponse response = reqFtp.GetResponse(); var reader = new StreamReader(response.GetResponseStream()); //中文文件名 string line = reader.ReadLine(); while (line != null) { if (!line.Contains("")) { 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; } }

public static FtpWebRequest FtpRequest(string requstUrl,string method,bool closedResponse=false) { var reqFtp = (FtpWebRequest) WebRequest.Create(new Uri(requstUrl)); //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 = method; //指定数据传输类型 reqFtp.UseBinary = true; if (closedResponse) { var resp=reqFtp.GetResponse(); resp.Close(); } return reqFtp; }

public static Stream Download(string remoteFile) { var ftpRequest = FtpRequest(Path + remoteFile, WebRequestMethods.Ftp.DownloadFile); var response = (FtpWebResponse)ftpRequest.GetResponse(); Stream ftpStream = response.GetResponseStream(); return ftpStream; }

public ActionResult DownloadFileFromFtp() { var filepath = "DIAView//simple.png"; var stream = FtpHelper.Download(filepath); return File(stream, FileHelper.GetContentType(".png"),"test.png"); }

public static bool UpLoad(Stream localFileStream, string remoteFile) { bool result = true; try { var ftpRequest = FtpRequest(Path + remoteFile, WebRequestMethods.Ftp.UploadFile); var ftpStream = ftpRequest.GetRequestStream(); var byteBuffer = new byte[bufferSize]; int bytesSent = localFileStream.Read(byteBuffer, 0, bufferSize); try { while (bytesSent != 0) { ftpStream.Write(byteBuffer, 0, bytesSent); bytesSent = localFileStream.Read(byteBuffer, 0, bufferSize); } } catch (Exception ex) { Console.WriteLine(ex.ToString()); result = false; } localFileStream.Close(); ftpStream.Close(); } catch (Exception ex) { Console.WriteLine(ex.ToString()); result = false; } return result; }

[HttpPost] public JsonResult UploadFile(HttpPostedFileBase fileData) { if (fileData != null) { string fileName = Path.GetFileName(fileData.FileName);// 原始文件名称 string saveName = Encrypt.GenerateOrderNumber() +"_"+fileName; FtpHelper.UpLoad(fileData.InputStream, "DIAView" + "/" + saveName); return Json(new { Success = true, FileName = fileName, SaveName = saveName}, JsonRequestBehavior.AllowGet); } return Json(new { Success = false, Message = "请选择要上传的文件！" }, JsonRequestBehavior.AllowGet); }