using System;
using System.IO;
using System.Net;
using System.Web.UI.WebControls;
namespace ZC.Utils
{
public class FTPHelper
{
public string Upload(FileUpload fileUpload, string ftpServerIP, string ftpUserID, string ftpPassword)
{
string filename = fileUpload.FileName;
string sRet = "上传成功！";
FileInfo fileInf = new FileInfo(fileUpload.PostedFile.FileName);
string uri = "ftp://" + ftpServerIP + "/" + filename;
FtpWebRequest reqFTP = (FtpWebRequest)WebRequest.Create(new Uri(uri));
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
reqFTP.KeepAlive = false;
reqFTP.Method = "STOR";
reqFTP.UseBinary = true;
reqFTP.UsePassive = false;
reqFTP.ContentLength = fileInf.Length;
int buffLength = 2048;
byte[] buff = new byte[buffLength];
FileStream fs = fileInf.OpenRead();
try
{
Stream strm = reqFTP.GetRequestStream();
for (int contentLen = fs.Read(buff, 0, buffLength); contentLen != 0; contentLen = fs.Read(buff, 0, buffLength))
{
strm.Write(buff, 0, contentLen);
}
strm.Close();
fs.Close();
}
catch (Exception ex)
{
sRet = ex.Message;
}
return sRet;
}
public string Download(string userId, string pwd, string ftpPath, string filePath, string fileName)
{
string sRet = "下载成功！";
try
{
FileStream outputStream = new FileStream(filePath + fileName, FileMode.Create);
FtpWebRequest reqFTP = (FtpWebRequest)WebRequest.Create(new Uri(ftpPath + fileName));
reqFTP.Method = "RETR";
reqFTP.UseBinary = true;
reqFTP.UsePassive = false;
reqFTP.Credentials = new NetworkCredential(userId, pwd);
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
Stream ftpStream = response.GetResponseStream();
long cl = response.ContentLength;
int bufferSize = 2048;
byte[] buffer = new byte[bufferSize];
for (int readCount = ftpStream.Read(buffer, 0, bufferSize); readCount > 0; readCount = ftpStream.Read(buffer, 0, bufferSize))
{
outputStream.Write(buffer, 0, readCount);
}
ftpStream.Close();
outputStream.Close();
response.Close();
}
catch (Exception ex)
{
sRet = ex.Message;
}
return sRet;
}
public string DeleteFile(string ftpPath, string userId, string pwd, string fileName)
{
string sRet = "删除成功！";
FtpWebResponse Respose = null;
Stream localfile = null;
Stream stream = null;
try
{
FtpWebRequest reqFTP = (FtpWebRequest)WebRequest.Create(new Uri(string.Format("{0}{1}", ftpPath, fileName)));
reqFTP.Credentials = new NetworkCredential(userId, pwd);
reqFTP.KeepAlive = false;
reqFTP.Method = "DELE";
Respose = (FtpWebResponse)reqFTP.GetResponse();
}
catch (Exception ex)
{
sRet = ex.Message;
}
finally
{
if (Respose != null)
{
Respose.Close();
}
if (localfile != null)
{
localfile.Close();
}
if (stream != null)
{
stream.Close();
}
}
return sRet;
}
}
}