高分请教关于FTP上传多个文件时只能成功上传一个文件问题.

springshen 2006-12-19 03:25:26
在写一个FTP上传多个文件的winform程序时出现一个怪现象,每次只能成功上传一个文件,随后就出现类似死机现象.我是在VS2005环境下,具体代码如下:
FTP类:
using System;
using System.Net;
using System.Threading;
using System.Collections.Generic;
using System.Net.Sockets;
using System.IO;
using System.Text;

namespace testpro
{
/// <summary>
/// FTP 的摘要说明。
/// </summary>

public class FTP
{
private string strRemoteHost;
private int strRemotePort;
private string strRemotePath;
private string strRemoteUser;
private string strRemotePass;
private Boolean bConnected;

#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 = 512;
Byte[] buffer = new Byte[BLOCK_SIZE];
/// <summary>
/// 编码方式
/// </summary>
Encoding ASCII = Encoding.Default;
#endregion

#region 内部函数

#region 构造函数
/// <summary>
/// 缺省构造函数
/// </summary>
public FTP()
{
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 FTP(string remoteHost, string remotePath, string remoteUser, string remotePass, int remotePort)
{
strRemoteHost = remoteHost;
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
...全文
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scow 2006-12-27
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跟踪一下,造成假死的代码是那一句。我在下载时遇到过同样的问题。
springshen 2006-12-19
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//上传按钮事件
private void AutoUploadBTN_Click(object sender, EventArgs e)
{
//异步上传文件
Upload_bgw.RunWorkerAsync();

myprcbar = new myProcessBar();
myprcbar.ShowDialog();
while (this.Upload_bgw.IsBusy)
{
Application.DoEvents();
}
}


private void Upload_bgw_DoWork(object sender, DoWorkEventArgs e)
{
//后台上传文件
myftp.RemoteHost = "172.25.23.13";
myftp.RemoteUser = user;
myftp.RemotePort = 21;
myftp.RemotePass = "12345678";
myftp.RemotePath = "/";
backstr = myftp.Connect();
if (backstr.Equals("您已于FTP服务器建立连接"))
{
//上传文件
UploadDir(tempDir,"\\",0);
backstr = backstr + "\r\n" + myftp.DisConnect();
}
}

//上传文件
private void UploadDir(string targetDir,string lastDir,int x)
{
string parentDir = "/";
message = "OK";
//读取FTP目录
if (x > 0)
lastDir = targetDir.Substring(tempDir.Length, targetDir.Length - tempDir.Length);

//读取文件夹中的所有信息
DirectoryInfo cDir = new DirectoryInfo(targetDir);

//在FTP服务器上创建文件夹
if (x > 0)
{
try
{
myftp.ChDir(lastDir.Replace("\\", "/"));
}
catch
{
//目录不存在时,返回上级目录
if (lastDir.Length - (targetDir.Substring(targetDir.LastIndexOf("\\")).Length) > 0)
parentDir = lastDir.Substring(0, lastDir.Length - (targetDir.Substring(targetDir.LastIndexOf("\\")).Length)).Replace("\\", "/");

message = myftp.MkDir(targetDir.Substring(targetDir.LastIndexOf("\\")).Remove(0, 1), parentDir);
if (!message.Equals("OK"))
{
message = targetDir.Substring(targetDir.LastIndexOf("\\")) + "目录在远程服务器上已经存在是否覆盖";
MessageBoxButtons btn = MessageBoxButtons.OKCancel;
result = MessageBox.Show(message, "提示", btn);
if (result == DialogResult.OK)
{
//删除FTP服务器上的目录
myftp.RmDir(targetDir.Substring(targetDir.LastIndexOf("\\")).Remove(0, 1));
message = myftp.MkDir(targetDir.Substring(targetDir.LastIndexOf("\\")), parentDir);
}
}
myftp.ChDir(lastDir.Replace("\\", "/"));
}
}
backstr = backstr + "\r\n" + myftp.Put(targetDir, "*.*");
x++;

//遍历此文件夹中的目录
DirectoryInfo[] uDirs = cDir.GetDirectories();
foreach (DirectoryInfo bDirs in uDirs)
{
UploadDir(targetDir + "\\" + bDirs.ToString(),lastDir,x);
}
}

private void Upload_bgw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
myprcbar.close_form();
//MessageBox.Show(backstr,"日志");
log mylog = new log(backstr);
mylog.Show();
this.Focus();
}
springshen 2006-12-19
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/// <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(0, 3));
}

/// <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 != 227)
{
throw new IOException(strReply.Substring(4));
}
int index1 = strReply.IndexOf('(');
int index2 = strReply.IndexOf(')');
string ipData =
strReply.Substring(index1 + 1, index2 - index1 - 1);
int[] parts = new int[6];
int len = ipData.Length;
int partCount = 0;
string buf = "";
for (int i = 0; i < len && partCount <= 6; i++)
{
char ch = Char.Parse(ipData.Substring(i, 1));
if (Char.IsDigit(ch))
buf += ch;
else if (ch != ',')
{
throw new IOException("Malformed PASV strReply: " +
strReply);
}
if (ch == ',' || i + 1 == len)
{
try
{
parts[partCount++] = Int32.Parse(buf);
buf = "";
}
catch (Exception)
{
throw new IOException("Malformed PASV strReply: " +
strReply);
}
}
}
string ipAddress = parts[0] + "." + parts[1] + "." +
parts[2] + "." + parts[3];
int port = (parts[4] << 8) + parts[5];
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;
try
{
iBytes = socketControl.Receive(buffer, buffer.Length, 0);
}
catch
{
iBytes = 10054;
}
strMsg += ASCII.GetString(buffer, 0, iBytes);
if (iBytes < buffer.Length)
{
break;
}
}
char[] seperator = { '\n' };
string[] mess = strMsg.Split(seperator);
if (strMsg.Length > 2)
{
strMsg = mess[mess.Length - 2];
//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[0];
}
if (!strMsg.Substring(3, 1).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, 0);
ReadReply();

}

#endregion

}
}
springshen 2006-12-19
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/// <summary>
/// 上传一批文件
/// </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 string Put(string strFolder, string strFileNameMask)
{
string[] strFiles = Directory.GetFiles(strFolder, strFileNameMask);
string returnstr = "";
foreach (string strFile in strFiles)
{
//strFile是完整的文件名(包含路径)
returnstr = returnstr + Put(strFile) + "\r\n";
}
return returnstr;

}


/// <summary>
/// 上传一个文件
/// </summary>
/// <param name="strFileName">本地文件名</param>
public string Put(string strFileName)
{
if (!bConnected)
{
Connect();
}
Socket socketData = CreateDataSocket();
SendCommand("STOR " + Path.GetFileName(strFileName));
if (!(iReplyCode == 125 || iReplyCode == 150))
{
return strFileName + strReply.Substring(4);
}
FileStream input = new
FileStream(strFileName, FileMode.Open);
int iBytes = 0;
while ((iBytes = input.Read(buffer, 0, buffer.Length)) > 0)
{
socketData.Send(buffer, iBytes, 0);
}
input.Close();
if (socketData.Connected)
{
socketData.Close();
}
if (!(iReplyCode == 226 || iReplyCode == 250))
{
ReadReply();
if (!(iReplyCode == 226 || iReplyCode == 250))
{
return strFileName + strReply.Substring(4);
}
}
return strFileName + "上传成功";
}

#endregion

#region 目录操作
/// <summary>
/// 创建目录
/// </summary>
/// <param name="strDirName">目录名</param>
public string MkDir(string strDirName,string parentDir)
{
if (!bConnected)
{
Connect();
}
SendCommand("CWD " + parentDir);
if (iReplyCode != 250)
{
return strReply.Substring(4);
}
SendCommand("MKD " + strDirName);
if (iReplyCode != 257)
{
return strReply.Substring(4);
}
else
return "OK";

}


/// <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 != 250)
{
throw new IOException(strReply.Substring(4));
}
}


/// <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 != 250)
{
throw new IOException(strReply.Substring(4));
}
this.strRemotePath = strDirName;
}

#endregion
xray2005 2006-12-19
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学习ing ...
springshen 2006-12-19
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/// <summary>
/// 获取文件大小
/// </summary>
/// <param name="strFileName">文件名</param>
/// <returns>文件大小</returns>
private long GetFileSize(string strFileName)
{
if (!bConnected)
{
Connect();
}
SendCommand("SIZE " + Path.GetFileName(strFileName));
long lSize = 0;
if (iReplyCode == 213)
{
lSize = Int64.Parse(strReply.Substring(4));
}
else
{
throw new IOException(strReply.Substring(4));
}
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 != 250)
{
throw new IOException(strReply.Substring(4));
}
}


/// <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 != 350)
{
throw new IOException(strReply.Substring(4));
}
// 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 != 250)
{
throw new IOException(strReply.Substring(4));
}
}
#endregion

#region 上传和下载
/// <summary>
/// 下载一批文件
/// </summary>
/// <param name="strFileNameMask">文件名的匹配字符串</param>
/// <param name="strFolder">本地目录(不得以\结束)</param>
public void Get(string strFileNameMask, string strFolder)
{
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, strFolder, strFile);
}
}
}


/// <summary>
/// 下载一个文件
/// </summary>
/// <param name="strRemoteFileName">要下载的文件名</param>
/// <param name="strFolder">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 strFolder, string strLocalFileName)
{
if (!bConnected)
{
Connect();
}
SetTransferType(TransferType.Binary);
if (strLocalFileName.Equals(""))
{
strLocalFileName = strRemoteFileName;
}
if (!File.Exists(strLocalFileName))
{
Stream st = File.Create(strLocalFileName);
st.Close();
}
FileStream output = new
FileStream(strFolder + "\\" + strLocalFileName, FileMode.Create);
Socket socketData = CreateDataSocket();
SendCommand("RETR " + strRemoteFileName);
if (!(iReplyCode == 150 || iReplyCode == 125
|| iReplyCode == 226 || iReplyCode == 250))
{
throw new IOException(strReply.Substring(4));
}
while (true)
{
int iBytes = socketData.Receive(buffer, buffer.Length, 0);
output.Write(buffer, 0, iBytes);
if (iBytes <= 0)
{
break;
}
}
output.Close();
if (socketData.Connected)
{
socketData.Close();
}
if (!(iReplyCode == 226 || iReplyCode == 250))
{
ReadReply();
if (!(iReplyCode == 226 || iReplyCode == 250))
{
throw new IOException(strReply.Substring(4));
}
}
}
springshen 2006-12-19
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#region 链接
/// <summary>
/// 建立连接
/// </summary>
public string 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)
{
return "不能与FTP服务器建立连接";
}

// 获取应答码
ReadReply();
if (iReplyCode != 220)
{
DisConnect();
return strReply.Substring(4);
}

// 登陆
SendCommand("USER " + strRemoteUser);
if (!(iReplyCode == 331 || iReplyCode == 230))
{
CloseSocketConnect();//关闭连接
return strReply.Substring(4);
}
if (iReplyCode != 230)
{
SendCommand("PASS " + strRemotePass);
if (!(iReplyCode == 230 || iReplyCode == 202))
{
CloseSocketConnect();//关闭连接
return strReply.Substring(4);
}
}
bConnected = true;

// 切换到目录
ChDir(strRemotePath);
return "您已于FTP服务器建立连接";
}


/// <summary>
/// 关闭连接
/// </summary>
public string DisConnect()
{
if (socketControl != null)
{
SendCommand("QUIT");
}
CloseSocketConnect();
return "您已于FTP服务器断开连接";
}

#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 != 200)
{
throw new IOException(strReply.Substring(4));
}
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);

//分析应答代码
if (!(iReplyCode == 150 || iReplyCode == 125 || iReplyCode == 226))
{
throw new IOException(strReply.Substring(4));
}

//获得结果
strMsg = "";
while (true)
{
int iBytes = socketData.Receive(buffer, buffer.Length, 0);
strMsg += ASCII.GetString(buffer, 0, iBytes);
if (iBytes < buffer.Length)
{
break;
}
}
char[] seperator = { '\n' };
string[] strsFileList = strMsg.Split(seperator);
socketData.Close();//数据socket关闭时也会有返回码
if (iReplyCode != 226)
{
ReadReply();
if (iReplyCode != 226)
{
throw new IOException(strReply.Substring(4));
}
}
return strsFileList;
}

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