FTP方式实现上传下载功能

1：FTP方式。通过在IIS里架设FTP服务器。代码

using System;

using System.Collections.Generic;

using System.Text;

using System.Net;

using System.IO;

using System.Windows.Forms;

namespace net.emice.TEST1

{

class FtpUpDown

{

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;

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 FtpUpDown(string ftpServerIP, string ftpUserID, string ftpPassword)

{

this.ftpServerIP = ftpServerIP;

this.ftpUserID = ftpUserID;

this.ftpPassword = ftpPassword;

}

//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.Default);//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 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 + "/" + 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;

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;

}

}

public string Download(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 + "/" + fileName;

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;

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 fileName)

{

try

{

FileInfo fileInf = new FileInfo(fileName);

string uri = "ftp://" + ftpServerIP + "/" + 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.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);

}

}

}

转载自：/article/10888167.html