封装的FTP操作类
项目中用到的一个FTP操作类，实现了：下载文件Download()和获取FTP服务器上文件列表信息GetFileList()using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;
using System.Windows.Forms;
namespace PCMDataImporter
{
///
/// 封装了FTP的两个操作：下载文件Download()和获取FTP服务器上文件列表信息GetFileList()
///
public class ftpOperater
{
private string ftpServerIP;
private string ftpUser;
private string ftpPwd;
private SystemParaReader spReader;
public ftpOperater()
{
spReader = new SystemParaReader();
this.ftpServerIP = spReader.GetSysParaValue("ftpServer");
this.ftpUser = spReader.GetSysParaValue("ftpUser");
this.ftpPwd = spReader.GetSysParaValue("ftpPwd");
}
///
/// 获取ftp服务器上的文件信息
///
/// 存储了所有文件信息的字符串数组
public string[] GetFileList()
{
string[] downloadFiles;
StringBuilder result = new StringBuilder();
FtpWebRequest reqFTP;
try
{
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/"));
reqFTP.UseBinary = true;
reqFTP.Credentials = new NetworkCredential(ftpUser, ftpPwd);
reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
WebResponse response = reqFTP.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)
{
System.Windows.Forms.MessageBox.Show("获取文件信息失败:"+ex.Message,"操作失败",MessageBoxButtons.OK,MessageBoxIcon.Error);
downloadFiles = null;
return downloadFiles;
}
}
///
/// 获取FTP上指定文件的大小
///
/// 文件名
/// 文件大小
public long GetFileSize(string filename)
{
FtpWebRequest reqFTP;
long fileSize = 0;
try
{
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + filename));
reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;
reqFTP.UseBinary = true;
reqFTP.Credentials = new NetworkCredential(ftpUser, ftpPwd);
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
Stream ftpStream = response.GetResponseStream();
fileSize = response.ContentLength;
ftpStream.Close();
response.Close();
}
catch (Exception ex)
{
MessageBox.Show("获取文件大小时，出现异常:\n" + ex.Message, "获取文件大小失败！", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
return fileSize;
}
///
/// 实现ftp下载操作
///
/// 保存到本地的文件名
/// 远程文件名
public void Download(string filePath, string fileName)
{
FtpWebRequest reqFTP;
try
{
//filePath = ,
//fileName =
FileStream outputStream = new FileStream(filePath + "\\" + fileName, FileMode.Create);
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileName));
reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
reqFTP.UseBinary = true;
reqFTP.Credentials = new NetworkCredential(ftpUser, ftpPwd);
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
Stream ftpStream = response.GetResponseStream();
long cl = response.ContentLength;
int bufferSize = 2048;
int readCount;
byte[] buffer = new byte;
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)
{
MessageBox.Show(ex.Message);
}
}
}
}
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