C#实现FTP文件的上传、下载功能、新建目录以及文件的删除
本来这篇博文应该在上周就完成的，可无奈，最近工作比较忙，没有时间写，所以推迟到了今天。可悲的是，今天也没有太多的时间，所以决定给大家贴出源码，不做详细的分析说明，如果有不懂的，可以给我留言，我们共同讨论。
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Security.Cryptography;
using System.Text;
using System.Windows.Forms; namespace UpLoad
{
class UpLoadFiles
{
private static string FTPCONSTR = "";//FTP的服务器地址，格式为ftp://192.168.1.234:8021/。ip地址和端口换成自己的，这些建议写在配置文件中，方便修改
private static string FTPUSERNAME = "";//FTP服务器的用户名
private static string FTPPASSWORD = "";//FTP服务器的密码 #region 本地文件上传到FTP服务器
/// <summary>
/// 上传文件到远程ftp
/// </summary>
/// <param name="path">本地的文件目录</param>
/// <param name="name">文件名称</param>
/// <returns></returns>
public static bool UploadFile(string path, string name)
{
string erroinfo = "";
FileInfo f = new FileInfo(path);
path = path.Replace("\\", "/");
path = FTPCONSTR + "/data/uploadFile/photo/" + name;//这个路径是我要传到ftp目录下的这个目录下
FtpWebRequest reqFtp = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));
reqFtp.UseBinary = true;
reqFtp.Credentials = new NetworkCredential(FTPUSERNAME, FTPPASSWORD);
reqFtp.KeepAlive = false;
reqFtp.Method = WebRequestMethods.Ftp.UploadFile;
reqFtp.ContentLength = f.Length;
int buffLength = 2048;
byte[] buff = new byte[buffLength];
int contentLen;
FileStream fs = f.OpenRead();
try
{
Stream strm = reqFtp.GetRequestStream();
contentLen = fs.Read(buff, 0, buffLength);
while (contentLen != 0)
{
strm.Write(buff, 0, contentLen);
contentLen = fs.Read(buff, 0, buffLength);
}
strm.Close();
fs.Close();
erroinfo = "完成";
return true;
}
catch (Exception ex)
{
erroinfo = string.Format("因{0},无法完成上传", ex.Message);
return false;
}
} /// <summary>
/// 上传文件到远程ftp
/// </summary>
/// <param name="ftpPath">ftp上的文件路径</param>
/// <param name="path">本地的文件目录</param>
/// <param name="id">文件名</param>
/// <returns></returns>
public static bool UploadFile(string ftpPath, string path, string id)
{
string erroinfo = "";
FileInfo f = new FileInfo(path);
path = path.Replace("\\", "/");
bool b = MakeDir(ftpPath);
if (b == false)
{
return false;
}
path = FTPCONSTR + ftpPath + id;
FtpWebRequest reqFtp = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));
reqFtp.UseBinary = true;
reqFtp.Credentials = new NetworkCredential(FTPUSERNAME, FTPPASSWORD);
reqFtp.KeepAlive = false;
reqFtp.Method = WebRequestMethods.Ftp.UploadFile;
reqFtp.ContentLength = f.Length;
int buffLength = 2048;
byte[] buff = new byte[buffLength];
int contentLen;
FileStream fs = f.OpenRead();
try
{
Stream strm = reqFtp.GetRequestStream();
contentLen = fs.Read(buff, 0, buffLength);
while (contentLen != 0)
{
strm.Write(buff, 0, contentLen);
contentLen = fs.Read(buff, 0, buffLength);
}
strm.Close();
fs.Close();
erroinfo = "完成";
return true;
}
catch (Exception ex)
{
erroinfo = string.Format("因{0},无法完成上传", ex.Message);
return false;
}
}
/// <summary>
/// 上传
/// </summary>
/// <param name="path">本地的文件目录</param>
/// <param name="name">文件名称</param>
/// <param name="pb">进度条</param>
/// <returns></returns>
public static bool UploadFile(string path, string name, ProgressBar pb)
{
string erroinfo = "";
float percent = 0;
FileInfo f = new FileInfo(path);
path = path.Replace("\\", "/");
path = FTPCONSTR + "/data/uploadFile/photo/" + name;
FtpWebRequest reqFtp = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));
reqFtp.UseBinary = true;
reqFtp.Credentials = new NetworkCredential(FTPUSERNAME, FTPPASSWORD);
reqFtp.KeepAlive = false;
reqFtp.Method = WebRequestMethods.Ftp.UploadFile;
reqFtp.ContentLength = f.Length;
int buffLength = 2048;
byte[] buff = new byte[buffLength];
int contentLen;
FileStream fs = f.OpenRead();
int allbye = (int)f.Length;
if (pb != null)
{
pb.Maximum = (int)allbye; }
int startbye = 0;
try
{
Stream strm = reqFtp.GetRequestStream();
contentLen = fs.Read(buff, 0, buffLength);
while (contentLen != 0)
{
strm.Write(buff, 0, contentLen);
startbye = contentLen + startbye;
if (pb != null)
{
pb.Value = (int)startbye;
}
contentLen = fs.Read(buff, 0, buffLength);
percent = (float)startbye / (float)allbye * 100;
}
strm.Close();
fs.Close();
erroinfo = "完成";
return true;
}
catch (Exception ex)
{
erroinfo = string.Format("因{0},无法完成上传", ex.Message);
return false;
}
}
/// <summary>
/// 文件上传到ftp
/// </summary>
/// <param name="ftpPath">ftp的文件路径</param>
/// <param name="path">本地的文件目录</param>
/// <param name="name">文件名称</param>
/// <param name="pb">进度条</param>
/// <returns></returns>
public static bool UploadFile(string ftpPath, string path, string name, ProgressBar pb)
{
//path = "ftp://" + UserUtil.serverip + path;
string erroinfo = "";
float percent = 0;
FileInfo f = new FileInfo(path);
path = path.Replace("\\", "/");
bool b = MakeDir(ftpPath);
if (b == false)
{
return false;
}
path = FTPCONSTR + ftpPath + name;
FtpWebRequest reqFtp = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));
reqFtp.UseBinary = true;
reqFtp.Credentials = new NetworkCredential(FTPUSERNAME, FTPPASSWORD);
reqFtp.KeepAlive = false;
reqFtp.Method = WebRequestMethods.Ftp.UploadFile;
reqFtp.ContentLength = f.Length;
int buffLength = 2048;
byte[] buff = new byte[buffLength];
int contentLen;
FileStream fs = f.OpenRead();
int allbye = (int)f.Length;
//if (pb != null)
//{
// pb.Maximum = (int)allbye; //}
int startbye = 0;
try
{
Stream strm = reqFtp.GetRequestStream();
contentLen = fs.Read(buff, 0, buffLength);
while (contentLen != 0)
{
strm.Write(buff, 0, contentLen);
startbye = contentLen + startbye;
percent = (float)startbye / (float)allbye * 100;
if (percent <= 100)
{
int i = (int)percent;
if (pb != null)
{
pb.BeginInvoke(new updateui(upui), new object[] { allbye, i, pb });
}
} contentLen = fs.Read(buff, 0, buffLength); // Console.WriteLine(percent);
}
strm.Close();
fs.Close();
erroinfo = "完成";
return true;
}
catch (Exception ex)
{
erroinfo = string.Format("因{0},无法完成上传", ex.Message);
return false;
}
}
private delegate void updateui(long rowCount, int i, ProgressBar PB);
public static void upui(long rowCount, int i, ProgressBar PB)
{
try
{
PB.Value = i;
}
catch { }
}
////上面的代码实现了从ftp服务器下载文件的功能
public static Stream Download(string ftpfilepath)
{
Stream ftpStream = null;
FtpWebResponse response = null;
try
{
ftpfilepath = ftpfilepath.Replace("\\", "/");
string url = FTPCONSTR + ftpfilepath;
FtpWebRequest reqFtp = (FtpWebRequest)FtpWebRequest.Create(new Uri(url));
reqFtp.UseBinary = true;
reqFtp.Credentials = new NetworkCredential(FTPUSERNAME, FTPPASSWORD);
response = (FtpWebResponse)reqFtp.GetResponse();
ftpStream = response.GetResponseStream();
}
catch (Exception ee)
{
if (response != null)
{
response.Close();
}
MessageBox.Show("文件读取出错，请确认FTP服务器服务开启并存在该文件");
}
return ftpStream;
}
#endregion #region 从ftp服务器下载文件 /// <summary>
/// 从ftp服务器下载文件的功能
/// </summary>
/// <param name="ftpfilepath">ftp下载的地址</param>
/// <param name="filePath">存放到本地的路径</param>
/// <param name="fileName">保存的文件名称</param>
/// <returns></returns>
public static bool Download(string ftpfilepath, string filePath, string fileName)
{
try
{
filePath = filePath.Replace("我的电脑\\", "");
String onlyFileName = Path.GetFileName(fileName);
string newFileName = filePath + onlyFileName;
if (File.Exists(newFileName))
{
//errorinfo = string.Format("本地文件{0}已存在,无法下载", newFileName);
File.Delete(newFileName);
//return false;
}
ftpfilepath = ftpfilepath.Replace("\\", "/");
string url = FTPCONSTR + ftpfilepath;
FtpWebRequest reqFtp = (FtpWebRequest)FtpWebRequest.Create(new Uri(url));
reqFtp.UseBinary = true;
reqFtp.Credentials = new NetworkCredential(FTPUSERNAME, 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 true;
}
catch (Exception ex)
{
//errorinfo = string.Format("因{0},无法下载", ex.Message);
return false;
}
}
//
/// <summary>
/// 从ftp服务器下载文件的功能----带进度条
/// </summary>
/// <param name="ftpfilepath">ftp下载的地址</param>
/// <param name="filePath">保存本地的地址</param>
/// <param name="fileName">保存的名字</param>
/// <param name="pb">进度条引用</param>
/// <returns></returns>
public static bool Download(string ftpfilepath, string filePath, string fileName, ProgressBar pb)
{
FtpWebRequest reqFtp = null;
FtpWebResponse response = null;
Stream ftpStream = null;
FileStream outputStream = null;
try
{
filePath = filePath.Replace("我的电脑\\", "");
String onlyFileName = Path.GetFileName(fileName);
string newFileName = filePath + onlyFileName;
if (File.Exists(newFileName))
{
try
{
File.Delete(newFileName);
}
catch { } }
ftpfilepath = ftpfilepath.Replace("\\", "/");
string url = FTPCONSTR + ftpfilepath;
reqFtp = (FtpWebRequest)FtpWebRequest.Create(new Uri(url));
reqFtp.UseBinary = true;
reqFtp.Credentials = new NetworkCredential(FTPUSERNAME, FTPPASSWORD);
response = (FtpWebResponse)reqFtp.GetResponse();
ftpStream = response.GetResponseStream();
long cl = GetFileSize(url);
int bufferSize = 2048;
int readCount;
byte[] buffer = new byte[bufferSize];
readCount = ftpStream.Read(buffer, 0, bufferSize);
outputStream = new FileStream(newFileName, FileMode.Create); float percent = 0;
while (readCount > 0)
{
outputStream.Write(buffer, 0, readCount);
readCount = ftpStream.Read(buffer, 0, bufferSize);
percent = (float)outputStream.Length / (float)cl * 100;
if (percent <= 100)
{
if (pb != null)
{
pb.Invoke(new updateui(upui), new object[] { cl, (int)percent, pb });
}
}
// pb.Invoke(new updateui(upui), new object[] { cl, outputStream.Length, pb }); } //MessageBoxEx.Show("Download0");
return true;
}
catch (Exception ex)
{
//errorinfo = string.Format("因{0},无法下载", ex.Message);
//MessageBoxEx.Show("Download00");
return false;
}
finally
{
//MessageBoxEx.Show("Download2");
if (reqFtp != null)
{
reqFtp.Abort();
}
if (response != null)
{
response.Close();
}
if (ftpStream != null)
{
ftpStream.Close();
}
if (outputStream != null)
{
outputStream.Close();
}
}
}
#endregion #region 获得文件的大小
/// <summary>
/// 获得文件大小
/// </summary>
/// <param name="url">FTP文件的完全路径</param>
/// <returns></returns>
public static long GetFileSize(string url)
{ long fileSize = 0;
try
{
FtpWebRequest reqFtp = (FtpWebRequest)FtpWebRequest.Create(new Uri(url));
reqFtp.UseBinary = true;
reqFtp.Credentials = new NetworkCredential(FTPUSERNAME, FTPPASSWORD);
reqFtp.Method = WebRequestMethods.Ftp.GetFileSize;
FtpWebResponse response = (FtpWebResponse)reqFtp.GetResponse();
fileSize = response.ContentLength; response.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
return fileSize;
}
#endregion #region 在ftp服务器上创建文件目录 /// <summary>
///在ftp服务器上创建文件目录
/// </summary>
/// <param name="dirName">文件目录</param>
/// <returns></returns>
public static bool MakeDir(string dirName)
{
try
{
bool b = RemoteFtpDirExists(dirName);
if (b)
{
return true;
}
string url = FTPCONSTR + dirName;
FtpWebRequest reqFtp = (FtpWebRequest)FtpWebRequest.Create(new Uri(url));
reqFtp.UseBinary = true;
// reqFtp.KeepAlive = false;
reqFtp.Method = WebRequestMethods.Ftp.MakeDirectory;
reqFtp.Credentials = new NetworkCredential(FTPUSERNAME, FTPPASSWORD);
FtpWebResponse response = (FtpWebResponse)reqFtp.GetResponse();
response.Close();
return true;
}
catch (Exception ex)
{
//errorinfo = string.Format("因{0},无法下载", ex.Message);
return false;
} }
/// <summary>
/// 判断ftp上的文件目录是否存在
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public static bool RemoteFtpDirExists(string path)
{ path = FTPCONSTR + path;
FtpWebRequest reqFtp = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));
reqFtp.UseBinary = true;
reqFtp.Credentials = new NetworkCredential(FTPUSERNAME, FTPPASSWORD);
reqFtp.Method = WebRequestMethods.Ftp.ListDirectory;
FtpWebResponse resFtp = null;
try
{
resFtp = (FtpWebResponse)reqFtp.GetResponse();
FtpStatusCode code = resFtp.StatusCode;//OpeningData
resFtp.Close();
return true;
}
catch
{
if (resFtp != null)
{
resFtp.Close();
}
return false;
}
}
#endregion #region 从ftp服务器删除文件的功能
/// <summary>
/// 从ftp服务器删除文件的功能
/// </summary>
/// <param name="fileName"></param>
/// <returns></returns>
public static bool DeleteFile(string fileName)
{
try
{
string url = FTPCONSTR + fileName;
FtpWebRequest reqFtp = (FtpWebRequest)FtpWebRequest.Create(new Uri(url));
reqFtp.UseBinary = true;
reqFtp.KeepAlive = false;
reqFtp.Method = WebRequestMethods.Ftp.DeleteFile;
reqFtp.Credentials = new NetworkCredential(FTPUSERNAME, FTPPASSWORD);
FtpWebResponse response = (FtpWebResponse)reqFtp.GetResponse();
response.Close();
return true;
}
catch (Exception ex)
{
//errorinfo = string.Format("因{0},无法下载", ex.Message);
return false;
}
}
#endregion
}
}
这是从FTP文件上传、下载、新建目录以及删除文件的一个类，应该有用的到的地放。关于ftp的配置，如果大家有疑问的话可以去网上查查，如果后期我有时间的话我也会写一写。
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