c# FTP的两种实现方法(一)-FtpWebRequest

class FTP_Class
{
string ftpServerIP;
string ftpUserID;
string ftpPassword;
FtpWebRequest reqFTP;

public void Connecttest(string ftpServerIP, string ftpUserID, string ftpPassword)
{
// 根据uri创建FtpWebRequest对象
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP));
// 指定数据传输类型
https://www.wendangku.net/doc/1b17902863.html,eBinary = true;
// ftp用户名和密码
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
}

#region 连接
///

/// 连接
///

///
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
https://www.wendangku.net/doc/1b17902863.html,eBinary = true;
// ftp用户名和密码
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
}
#endregion

#region ftp登录信息
///

/// ftp登录信息
///

/// ftpServerIP
/// ftpUserID
/// ftpPassword
public void FtpUpDown(string ftpServerIP, string ftpUserID, string ftpPassword)
{
this.ftpServerIP = ftpServerIP;
this.ftpUserID = ftpUserID;
this.ftpPassword = ftpPassword;
}
#endregion

#region 获取文件列表
///

/// 获取文件列表
///

///
///
///
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.UTF8);//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);
}
#endregion

#region 上传文件
///

/// 上传文件
///

///
public bool Upload(string filename, string path, out string errorinfo) //上面的代码实现了从ftp服务器上载文件的功能
{
path = path.Replace("\\", "/");
FileInfo fileInf = new FileInfo(filename);
string uri = "ftp://" + path + "/" + https://www.wendangku.net/doc/1b17902863.html,;
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();
errorinfo = "完成";
return true;
}
catch (Exception ex)
{
errorinfo = string.Format("因{0},无法完成上传", ex.Message);
return false;
}
}
#endregion

#region 续传文件
///

/// 续传文件
///

///

>
public bool Upload(string filename, long size,string path, out string errorinfo) //上面的代码实现了从ftp服务器上载文件的功能
{
path = path.Replace("\\", "/");
FileInfo fileInf = new FileInfo(filename);
//string uri = "ftp://" + path + "/" + https://www.wendangku.net/doc/1b17902863.html,;
string uri = "ftp://" + path;
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.AppendFile;
// 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
{
StreamReader dsad = new StreamReader(fs);
fs.Seek(size, SeekOrigin.Begin);
// 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();
errorinfo = "完成";
return true;
}
catch (Exception ex)
{
errorinfo = string.Format("因{0},无法完成上传", ex.Message);
return false;
}
}
#endregion

#region 下载文件
///

/// 下载文件
///

///
///
///
///
public bool Download(string ftpfilepath, string filePath, string fileName, out string errorinfo)////上面的代码实现了从ftp服务器下载文件的功能
{
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);

return false;
}
ftpfilepath = ftpfilepath.Replace("\\", "/");
string url = "ftp://" + ftpfilepath;
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();
errorinfo = "";
return true;
}
catch (Exception ex)
{
errorinfo = string.Format("因{0},无法下载", ex.Message);
return false;
}
}
#endregion

#region 删除文件
///

/// 删除文件
///

///
public void DeleteFileName(string fileName)
{
try
{
FileInfo fileInf = new FileInfo(fileName);
string uri = "ftp://" + ftpServerIP + "/" + https://www.wendangku.net/doc/1b17902863.html,;
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");
}
}
#endregion

#region 在ftp上创建目录
///

/// 在ftp上创建目录
///

///
public void 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();
}
catch (Exception ex)
{
// MessageBo

x.Show(ex.Message);
}
}
#endregion

#region 删除ftp上目录
///

/// 删除ftp上目录
///

///
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);
}
}
#endregion

#region 获得ftp上文件大小
///

/// 获得ftp上文件大小
///

///
///
public long GetFileSize(string filename)
{
long fileSize = 0;
filename = filename.Replace("\\","/");
try
{
// FileInfo fileInf = new FileInfo(filename);
//string uri1 = "ftp://" + ftpServerIP + "/" + https://www.wendangku.net/doc/1b17902863.html,;
// string uri = filename;
string uri = "ftp://" + filename;
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;
}
#endregion

#region ftp上文件改名
///

/// ftp上文件改名
///

///
///
public void Rename(string currentFilename, string newFilename)
{
try
{
FileInfo fileInf = new FileInfo(currentFilename);
string uri = "ftp://" + ftpServerIP + "/" + https://www.wendangku.net/doc/1b17902863.html,;
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);
}
}
#endregion

#region 获得文件明晰
///

/// 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)
{
path = path.Replace("\\", "/");
return GetFileList("ftp://" + path, WebRequestMethods.Ftp.ListDirectoryDetails);
}
#endregion

}