public delegate void DownloadProgressChangedEventHandle(string information, long currentprogress, long totalprogress, string filename);
public delegate void DownloadFileCompletedEventHandle(string information, bool success, string filename);
public delegate void UploadProgressChangedEventHandle(string information, long currentprogress, long totalprogress, string filename);
public delegate void UploadFileCompletedEventHandle(string information, bool success, string filename); /// <summary>
/// FTP 的摘要说明。
/// </summary>
public class FTPClient
{
private string strRemoteHost;
private int strRemotePort;
private string strRemotePath;
private string strRemoteUser;
private string strRemotePass;
private Boolean bConnected; public event DownloadProgressChangedEventHandle DownloadProgressChanged;
public event DownloadFileCompletedEventHandle DownloadFileCompleted;
public event UploadProgressChangedEventHandle UploadProgressChanged;
public event UploadFileCompletedEventHandle UploadFileCompleted; #region 内部变量
/// <summary>
/// 服务器返回的应答信息(包含应答码)
/// </summary>
private string strMsg;
/// <summary>
/// 服务器返回的应答信息(包含应答码)
/// </summary>
private string strReply;
/// <summary>
/// 服务器返回的应答码
/// </summary>
private int iReplyCode;
/// <summary>
/// 进行控制连接的socket
/// </summary>
private Socket socketControl;
/// <summary>
/// 传输模式
/// </summary>
private TransferType trType;
/// <summary>
/// 传输模式:二进制类型、ASCII类型
/// </summary>
public enum TransferType
{
/// <summary>
/// Binary
/// </summary>
Binary,
/// <summary>
/// ASCII
/// </summary>
ASCII
};
/// <summary>
/// 接收和发送数据的缓冲区
/// </summary>
private static int BLOCK_SIZE = ;
Byte[] buffer = new Byte[BLOCK_SIZE];
/// <summary>
/// 编码方式
/// </summary>
Encoding ASCII = Encoding.Default; private AsyncOperation asyncOperation; #endregion #region 内部函数 #region 构造函数
/// <summary>
/// 缺省构造函数
/// </summary>
//public FTPClient()
//{
// strRemoteHost = "";
// strRemotePath = "";
// strRemoteUser = "";
// strRemotePass = "";
// strRemotePort = 21;
// bConnected = false;
//} /// <summary>
/// 构造函数
/// </summary>
/// <param name="remoteHost"></param>
/// <param name="remotePath"></param>
/// <param name="remoteUser"></param>
/// <param name="remotePass"></param>
/// <param name="remotePort"></param>
public FTPClient(string remoteHost, string remotePath, string remoteUser, string remotePass, int remotePort)
{
IPAddress[] ips; ips = Dns.GetHostAddresses(remoteHost);
strRemoteHost = ips[].ToString();
strRemotePath = remotePath;
strRemoteUser = remoteUser;
strRemotePass = remotePass;
strRemotePort = remotePort;
Connect();
}
#endregion #region 登陆
/// <summary>
/// FTP服务器IP地址
/// </summary> public string RemoteHost
{
get
{
return strRemoteHost;
}
set
{
strRemoteHost = value;
}
}
/// <summary>
/// FTP服务器端口
/// </summary>
public int RemotePort
{
get
{
return strRemotePort;
}
set
{
strRemotePort = value;
}
}
/// <summary>
/// 当前服务器目录
/// </summary>
public string RemotePath
{
get
{
return strRemotePath;
}
set
{
strRemotePath = value;
}
}
/// <summary>
/// 登录用户账号
/// </summary>
public string RemoteUser
{
set
{
strRemoteUser = value;
}
}
/// <summary>
/// 用户登录密码
/// </summary>
public string RemotePass
{
set
{
strRemotePass = value;
}
} /// <summary>
/// 是否登录
/// </summary>
public bool Connected
{
get
{
return bConnected;
}
}
#endregion #region 链接
/// <summary>
/// 建立连接
/// </summary>
public void Connect()
{
socketControl = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint ep = new IPEndPoint(IPAddress.Parse(RemoteHost), strRemotePort);
// 链接
try
{
socketControl.Connect(ep);
}
catch (Exception)
{
throw new IOException("Couldn't connect to remote server");
} // 获取应答码
ReadReply();
if (iReplyCode != )
{
DisConnect();
throw new IOException(strReply.Substring());
} // 登陆
SendCommand("USER " + strRemoteUser);
if (!(iReplyCode == || iReplyCode == ))
{
CloseSocketConnect();//关闭连接
throw new IOException(strReply.Substring());
}
if (iReplyCode != )
{
SendCommand("PASS " + strRemotePass);
if (!(iReplyCode == || iReplyCode == ))
{
CloseSocketConnect();//关闭连接
throw new IOException(strReply.Substring());
}
}
bConnected = true; // 切换到目录
ChDir(strRemotePath);
} /// <summary>
/// 关闭连接
/// </summary>
public void DisConnect()
{
if (socketControl != null)
{
SendCommand("QUIT");
}
CloseSocketConnect();
} #endregion #region 传输模式 /// <summary>
/// 设置传输模式
/// </summary>
/// <param name="ttType">传输模式</param>
public void SetTransferType(TransferType ttType)
{
if (ttType == TransferType.Binary)
{
SendCommand("TYPE I");//binary类型传输
}
else
{
SendCommand("TYPE A");//ASCII类型传输
}
if (iReplyCode != )
{
throw new IOException(strReply.Substring());
}
else
{
trType = ttType;
}
} /// <summary>
/// 获得传输模式
/// </summary>
/// <returns>传输模式<\returns>
public TransferType GetTransferType()
{
return trType;
} #endregion #region 文件操作
/// <summary>
/// 获得文件列表
/// </summary>
/// <param name="strMask">文件名的匹配字符串</param>
/// <returns><\returns>
public string[] Dir(string strMask)
{
// 建立链接
if (!bConnected)
{
Connect();
} //建立进行数据连接的socket
Socket socketData = CreateDataSocket(); //传送命令
SendCommand("NLST " + strMask);
if (iReplyCode == )
{
Put(strMask);
SendCommand("NLST " + strMask);
}
//分析应答代码
if (!(iReplyCode == || iReplyCode == || iReplyCode == ))
{
throw new IOException(strReply.Substring());
} //获得结果
strMsg = "";
while (true)
{
int iBytes = socketData.Receive(buffer, buffer.Length, );
strMsg += ASCII.GetString(buffer, , iBytes);
if (iBytes < buffer.Length)
{
break;
}
}
strMsg = strMsg.Replace('\r', ' ');
char[] seperator = { '\n' };
string[] strsFileList = strMsg.Split(seperator, StringSplitOptions.RemoveEmptyEntries);
socketData.Close();//数据socket关闭时也会有返回码
if (iReplyCode != )
{
ReadReply();
if (iReplyCode != )
{
throw new IOException(strReply.Substring());
}
}
return strsFileList;
} /// <summary>
/// 获取文件大小
/// </summary>
/// <param name="strFileName">文件名</param>
/// <returns>文件大小<\returns>
public long GetFileSize(string strFileName)
{
if (!bConnected)
{
Connect();
}
SendCommand("SIZE " + Path.GetFileName(strFileName));
long lSize = ;
if (iReplyCode == )
{
lSize = Int64.Parse(strReply.Substring());
}
else
{
throw new IOException(strReply.Substring());
}
return lSize;
} /// <summary>
/// 删除
/// </summary>
/// <param name="strFileName">待删除文件名</param>
public void Delete(string strFileName)
{
if (!bConnected)
{
Connect();
}
SendCommand("DELE " + strFileName);
if (iReplyCode != )
{
throw new IOException(strReply.Substring());
}
} /// <summary>
/// 重命名(如果新文件名与已有文件重名,将覆盖已有文件)
/// </summary>
/// <param name="strOldFileName">旧文件名</param>
/// <param name="strNewFileName">新文件名</param>
public void Rename(string strOldFileName, string strNewFileName)
{
if (!bConnected)
{
Connect();
}
SendCommand("RNFR " + strOldFileName);
if (iReplyCode != )
{
throw new IOException(strReply.Substring());
}
// 如果新文件名与原有文件重名,将覆盖原有文件
SendCommand("RNTO " + strNewFileName);
if (iReplyCode != )
{
throw new IOException(strReply.Substring());
}
}
#endregion #region 上传和下载
/// <summary>
/// 下载多个文件
/// </summary>
/// <param name="strFileNameMask">文件名的匹配字符串</param>
/// <param name="strLocalFolder">本地目录(不得以/结束)</param>
public void Get(string strFileNameMask, string strLocalFolder)
{
if (!bConnected)
{
Connect();
}
string[] strFiles = Dir(strFileNameMask);
foreach (string strFile in strFiles)
{
if (!strFile.Equals(""))//一般来说strFiles的最后一个元素可能是空字符串
{
Get(strFile, strLocalFolder, strFile);
}
}
} /// <summary>
/// 下载单个文件
/// </summary>
/// <param name="strRemoteFileName">要下载的文件名</param>
/// <param name="strLocalFolder">本地目录(不得以/结束)</param>
/// <param name="strLocalFileName">保存在本地时的文件名</param>
public void Get(string strRemoteFileName, string strLocalFolder, string strLocalFileName)
{
if (!bConnected)
{
Connect();
} SetTransferType(TransferType.Binary); if (strLocalFileName.Equals(""))
{
strLocalFileName = strRemoteFileName;
}
if (!File.Exists(strLocalFileName))
{
Stream st = File.Create(strLocalFileName);
st.Close();
} long fileSize = this.GetFileSize(strRemoteFileName);//mlh 获取文件总大小 FileStream output = new
FileStream(strLocalFolder + "//" + strLocalFileName, FileMode.Create);
Socket socketData = CreateDataSocket();
SendCommand("RETR " + strRemoteFileName);
if (!(iReplyCode == || iReplyCode ==
|| iReplyCode == || iReplyCode == ))
{
throw new IOException(strReply.Substring());
}
long num = ; //mlh 记录总的上传大小
while (true)
{
int iBytes = socketData.Receive(buffer, buffer.Length, );
output.Write(buffer, , iBytes);
num += iBytes;
if (DownloadProgressChanged != null)
{
if (asyncOperation != null)
{
asyncOperation.Post((object data) =>
{
DownloadProgressChanged("", num, fileSize, strRemoteFileName);
}, null);
}
else
DownloadProgressChanged("", num, fileSize, strRemoteFileName); }
if (iBytes <= )
{
break;
}
}
output.Close();
if (socketData.Connected)
{
socketData.Close();
}
if (!(iReplyCode == || iReplyCode == ))
{
ReadReply();
if (!(iReplyCode == || iReplyCode == ))
{
throw new IOException(strReply.Substring());
}
} if (asyncOperation != null)
{
asyncOperation.Post((object data) =>
{
DownloadFileCompleted("", true, strRemoteFileName);
}, null);
}
else
DownloadFileCompleted("", true, strRemoteFileName);
} /// <summary>
/// 异步下载多个文件
/// </summary>
/// <param name="strFileNameMask"></param>
/// <param name="strLocalFolder"></param>
public void GetAsync(string strFileNameMask, string strLocalFolder)
{
asyncOperation = AsyncOperationManager.CreateOperation(null);
Thread threadGet = new Thread(new ThreadStart(() => { Get(strFileNameMask, strLocalFolder); }));
threadGet.IsBackground = true;
threadGet.Start();
} /// <summary>
/// 异步下载单个文件
/// </summary>
/// <param name="strFileNameMask"></param>
/// <param name="strLocalFolder"></param>
/// <param name="strLocalFileName"></param>
public void GetAsync(string strFileNameMask, string strLocalFolder, string strLocalFileName)
{
asyncOperation = AsyncOperationManager.CreateOperation(null);
Thread threadGet = new Thread(new ThreadStart(() => { Get(strFileNameMask, strLocalFolder, strLocalFileName); }));
threadGet.IsBackground = true;
threadGet.Start();
} /// <summary>
/// 上传多个文件
/// </summary>
/// <param name="strFolder">本地目录(不得以/结束)</param>
/// <param name="strFileNameMask">文件名匹配字符(可以包含*和?)</param>
public void Put(string strFolder, string strFileNameMask)
{
string[] strFiles = Directory.GetFiles(strFolder, strFileNameMask);
foreach (string strFile in strFiles)
{
//strFile是完整的文件名(包含路径)
Put(strFile);
}
} /// <summary>
/// 上传一个文件
/// </summary>
/// <param name="strFileName">本地文件名</param>
public void Put(string strFileName)
{
if (!bConnected)
{
Connect();
}
Socket socketData = CreateDataSocket();
SendCommand("STOR " + Path.GetFileName(strFileName));
if (!(iReplyCode == || iReplyCode == ))
{
throw new IOException(strReply.Substring());
} FileStream input = new
FileStream(strFileName, FileMode.Open); long num = ;//mlh 当前上传大小
long fileSize = input.Length;//mlh 文件总大小
int iBytes = ;
while ((iBytes = input.Read(buffer, , buffer.Length)) > )
{
num += iBytes;
if (UploadProgressChanged != null)
UploadProgressChanged("", num, fileSize, strFileName);
socketData.Send(buffer, iBytes, );
}
input.Close();
if (socketData.Connected)
{
socketData.Close();
}
if (!(iReplyCode == || iReplyCode == ))
{
ReadReply();
if (!(iReplyCode == || iReplyCode == ))
{
throw new IOException(strReply.Substring());
}
}
if (UploadFileCompleted != null)
UploadFileCompleted("", true, strFileName);
} /// <summary>
/// 异步上传多个文件
/// </summary>
/// <param name="strFolder"></param>
/// <param name="strFileNameMask"></param>
public void PutAsync(string strFolder, string strFileNameMask)
{
asyncOperation = AsyncOperationManager.CreateOperation(null);
Thread threadGet = new Thread(new ThreadStart(() => { Put(strFolder, strFileNameMask); }));
threadGet.IsBackground = true;
threadGet.Start();
} /// <summary>
/// 异步上传多个文件
/// </summary>
/// <param name="strFileName"></param>
public void PutAsync(string strFileName)
{
asyncOperation = AsyncOperationManager.CreateOperation(null);
Thread threadGet = new Thread(new ThreadStart(() => { Put(strFileName); }));
threadGet.IsBackground = true;
threadGet.Start();
} #endregion #region 目录操作
/// <summary>
/// 创建目录
/// </summary>
/// <param name="strDirName">目录名</param>
public void MkDir(string strDirName)
{
if (!bConnected)
{
Connect();
}
SendCommand("MKD " + strDirName);
if (iReplyCode != )
{
throw new IOException(strReply.Substring());
}
} /// <summary>
/// 删除目录
/// </summary>
/// <param name="strDirName">目录名</param>
public void RmDir(string strDirName)
{
if (!bConnected)
{
Connect();
}
SendCommand("RMD " + strDirName);
if (iReplyCode != )
{
throw new IOException(strReply.Substring());
}
} /// <summary>
/// 改变目录
/// </summary>
/// <param name="strDirName">新的工作目录名</param>
public void ChDir(string strDirName)
{
if (strDirName.Equals(".") || strDirName.Equals(""))
{
return;
}
if (!bConnected)
{
Connect();
}
SendCommand("CWD " + strDirName);
if (iReplyCode != )
{
throw new IOException(strReply.Substring());
}
this.strRemotePath = strDirName;
} /// <summary>
/// 列目录
/// </summary>
/// <param name="strDirName"></param>
public string[] ListDir()
{
if (!bConnected)
{
Connect();
}
//建立进行数据连接的socket
Socket socketData = CreateDataSocket();
SendCommand("LIST");
if (iReplyCode != )
{
throw new IOException(strReply.Substring());
} //获得结果
strMsg = "";
while (true)
{
int iBytes = socketData.Receive(buffer, buffer.Length, );
strMsg += ASCII.GetString(buffer, , iBytes);
if (iBytes < buffer.Length)
{
break;
}
}
strMsg = strMsg.Replace('\r', ' ');
char[] seperator = { '\n' };
string[] strsFileList = strMsg.Split(seperator);
socketData.Close();//数据socket关闭时也会有返回码
if (iReplyCode != )
{
ReadReply();
if (iReplyCode != )
{
throw new IOException(strReply.Substring());
}
}
return strsFileList;
} #endregion /// <summary>
/// 将一行应答字符串记录在strReply和strMsg
/// 应答码记录在iReplyCode
/// </summary>
private void ReadReply()
{
strMsg = "";
strReply = ReadLine();
iReplyCode = Int32.Parse(strReply.Substring(, ));
} /// <summary>
/// 建立进行数据连接的socket
/// </summary>
/// <returns>数据连接socket<\returns>
private Socket CreateDataSocket()
{
SendCommand("PASV");
if (iReplyCode != )
{
throw new IOException(strReply.Substring());
}
int index1 = strReply.IndexOf('(');
int index2 = strReply.IndexOf(')');
string ipData =
strReply.Substring(index1 + , index2 - index1 - );
int[] parts = new int[];
int len = ipData.Length;
int partCount = ;
string buf = "";
for (int i = ; i < len && partCount <= ; i++)
{
char ch = Char.Parse(ipData.Substring(i, ));
if (Char.IsDigit(ch))
buf += ch;
else if (ch != ',')
{
throw new IOException("Malformed PASV strReply: " +
strReply);
}
if (ch == ',' || i + == len)
{
try
{
parts[partCount++] = Int32.Parse(buf);
buf = "";
}
catch (Exception)
{
throw new IOException("Malformed PASV strReply: " +
strReply);
}
}
}
string ipAddress = parts[] + "." + parts[] + "." +
parts[] + "." + parts[];
int port = (parts[] << ) + parts[];
Socket s = new
Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint ep = new
IPEndPoint(IPAddress.Parse(ipAddress), port);
try
{
s.Connect(ep);
}
catch (Exception)
{
throw new IOException("Can't connect to remote server");
}
return s;
} /// <summary>
/// 关闭socket连接(用于登录以前)
/// </summary>
private void CloseSocketConnect()
{
if (socketControl != null)
{
socketControl.Close();
socketControl = null;
}
bConnected = false;
} /// <summary>
/// 读取Socket返回的所有字符串
/// </summary>
/// <returns>包含应答码的字符串行<\returns>
private string ReadLine()
{
while (true)
{
int iBytes = socketControl.Receive(buffer, buffer.Length, );
strMsg += ASCII.GetString(buffer, , iBytes);
if (iBytes < buffer.Length)
{
break;
}
}
char[] seperator = new char[] { '\n' };
string[] mess = strMsg.Split(seperator);
if (strMsg.Length > )
{
strMsg = mess[mess.Length - ];
//seperator[0]是10,换行符是由13和0组成的,分隔后10后面虽没有字符串,
//但也会分配为空字符串给后面(也是最后一个)字符串数组,
//所以最后一个mess是没用的空字符串
//但为什么不直接取mess[0],因为只有最后一行字符串应答码与信息之间有空格
}
else
{
strMsg = mess[];
}
if (!strMsg.Substring(, ).Equals(" "))//返回字符串正确的是以应答码(如220开头,后面接一空格,再接问候字符串)
{
return ReadLine();
}
return strMsg;
} /// <summary>
/// 发送命令并获取应答码和最后一行应答字符串
/// </summary>
/// <param name="strCommand">命令</param>
private void SendCommand(string strCommand)
{
Byte[] cmdBytes = ASCII.GetBytes((strCommand + "\r\n").ToCharArray());
socketControl.Send(cmdBytes, cmdBytes.Length, );
ReadReply();
} #endregion
}
ps：在实际使用过程中发现由于BLOCK_SIZE设置太小导致DownloadProgressChanged事件触发过于频繁，结果界面会卡顿，所以具体多少可以自己调试设置