您的位置:首页 > 编程语言 > C#

使用C#进行点对点通讯和文件传输(发送接收部分)

2006-01-22 23:07 573 查看
上面介绍了通讯的基类,下面就是使用那个类进行发送和接收的部分:

二、发送部分:

发送咱们使用了多线程,可以同时进行多个任务,比如发送文件、发送文本等,互不影响:

发送文本方法:

private void StartSendText(string strHost,int iPort,string strInfo)

{

SendText stText = new SendText(strHost,iPort,strInfo,new CommunClass.OnSend(OnSendDrawProgress)) ;

StartThread(new ThreadStart(stText.Send)) ;

}

下面是他调用用到的一些方法:

开始一个线程

private void StartThread(ThreadStart target)

{

Thread doStep = new Thread(target) ;

doStep.IsBackground = true ;

doStep.Start() ;

}

发送一部分(本文设置的是1024字节)成功后的回调方法

public void OnSendDrawProgress(int iTotal,int iSending)

{

if (iTotal != pbMain.Maximum)

pbMain.Maximum = iTotal ;

pbMain.Value = iSending ;

}

因为使用的是线程,所以发送文本使用的是一个发送文本类的方法,该类如下:

public class SendText

{

private string Host ;

private int Port ;

private string Info ;

private CommunClass.OnSend onsend ;

public SendText(string strHost,int iPort,string strInfo,

CommunClass.OnSend onSend)

{

Host = strHost ;

Port = iPort ;

Info = strInfo ;

onsend = onSend ;

}

public void Send()

{

Socket s = null ;

try

{

s = CommunClass.ConnectToServer(Host,Port) ;

CommunClass.WriteCommandToSocket(s,"SENDTEXT") ;

CommunClass.WriteCommandDescToSocket(s,"") ;

CommunClass.WriteDynamicTextToSocket(s,Info,onsend) ;

}

catch (Exception e)

{

MessageBox.Show(e.Message) ;

}

finally

{

if (s != null)

s.Close() ;

}

}

}//end class

这样就可以使用一个线程发送文本了。
发送文件的方法也类似:

private void StartSendFile(string strHost,int iPort,string strFile)

{

SendFile sfFile = new SendFile(strHost,iPort,strFile,this.pbMain) ;

pbMain.Value = 0 ;

StartThread(new ThreadStart(sfFile.Send)) ;

}
发送文件的类:

public class SendFile

{

private string Host ;

private int Port ;

private string FileToSend ;

private ProgressBar pbar;

public SendFile(string strHost,int iPort,string strFile,ProgressBar pbMain)

{

Host = strHost ;

Port = iPort ;

FileToSend = strFile ;

pbar = pbMain ;

}

public void Send()

{

Socket s = null ;

try

{

s = CommunClass.ConnectToServer(Host,Port) ;

CommunClass.WriteCommandToSocket(s,"SENDFILE") ;

CommunClass.WriteCommandDescToSocket(s,"") ;

CommunClass.WriteFileToSocket(s,FileToSend,new CommunClass.OnSend(OnSendDrawProgress)) ;

}

catch (Exception e)

{

MessageBox.Show(e.Message) ;

}

finally

{

if (s != null)

s.Close() ;

}

}

public void OnSendDrawProgress(int iTotal,int iSending)

{

if (iTotal != pbar.Maximum)

pbar.Maximum = iTotal ;

pbar.Value = iSending ;

}

}//end class

当然,你发送一个命令让服务器端启动一个程序(靠,这不成木马了吗?)也可以:
俺这里只给出一部分代码,其余的您自己可以发挥以下:
public class ExeCuteFile

{

private string Host ;

private int Port ;

private string FileName ;

private string cmdParam ;

public ExeCuteFile(string strHost,int iPort,string strFileName,string strCmdParam)

{

Host = strHost ;

Port = iPort ;

FileName = strFileName ;

cmdParam = strCmdParam ;

}

public void Send()

{

Socket s = null ;

try

{

s = CommunClass.ConnectToServer(Host,Port) ;

CommunClass.WriteCommandToSocket(s,"EXECUTEFILE") ;

CommunClass.WriteCommandDescToSocket(s,FileName) ;

CommunClass.WriteDynamicTextToSocket(s,"",null) ;

MessageBox.Show(CommunClass.ReadDynamicTextFromSocket(s)) ;

}

catch (Exception e)

{

MessageBox.Show(e.Message) ;

}

finally

{

if (s != null)

s.Close() ;

}

}

}

三、下面是服务器端接受信息的代码:
创建监听:
/// <summary>

/// 再给定的主机和端口上创建监听程序

/// </summary>

/// <param name="strAddress"></param>

/// <param name="iPort"></param>

private void BuildingServer(string strAddress,int iPort)

{

IPAddress ipAddress = Dns.Resolve(strAddress).AddressList[0];

try

{

listener = new TcpListener(ipAddress, iPort);

}

catch ( Exception e)

{

AddInfo(e.Message) ;

}

}

开始监听:

/// <summary>

/// 开始监听

/// </summary>

private void StartListen()

{

bool done = false;

listener.Start();

while (!done)

{

Socket s = listener.AcceptSocket() ;

if(s != null)

{

DealWithSocket dws = new DealWithSocket(s,this.tbLog) ;

StartThread(new ThreadStart(dws.DealWith)) ;

}

}

}

private void StartThread(ThreadStart target)

{

Thread doStep = new Thread(target) ;

doStep.IsBackground = true ;

doStep.Start() ;

}

开始监听后,对于每一个监听到的客户端的连接都用一个单独的线程来处理,处理通过类DealWithSocket来完成,下面是类代码:
public class DealWithSocket

{

private Socket s = null ;

private TextBox tbLog = null ;

public DealWithSocket(Socket newSocket,TextBox tbInfo)

{

s = newSocket ;

tbLog = tbInfo ;

}

public void DealWith()

{

string strCmd = CommunClass.ReadCommandFromSocket(s) ;

string strDesc = CommunClass.ReadCommandDescFromSocket(s) ;

AddInfo(strCmd) ;

switch(strCmd)

{

case "SENDFILE" :

CommunClass.ReadDynamicFileFromSocket(s,"e://rrr.txt") ;

break ;

case "EXECUTEFILE" :

string strParam = CommunClass.ReadDynamicTextFromSocket(s) ;

string strResult = ExeCuteFile(strDesc,strParam) ;

CommunClass.WriteDynamicTextToSocket(s,strResult,null) ;

break ;

default:

string strDetail = CommunClass.ReadDynamicTextFromSocket(s) ;

AddInfo(strDetail) ;

break ;

}

try

{

s.Close() ;

}

catch (Exception e)

{

AddInfo(e.Message) ;

}

}

private void AddInfo(string strInfo)

{

string Info = DateTime.Now.ToLongTimeString() + " "+ strInfo +"/r/n" ;

tbLog.Text += Info ;

tbLog.Refresh() ;

}

private string ExeCuteFile(string strFileName,string strCmdParam)

{

System.Diagnostics.Process proc = new System.Diagnostics.Process() ;

proc.StartInfo.FileName = strFileName ;

proc.StartInfo.Arguments = strCmdParam ;

try

{

proc.Start() ;

return "OK" ;

}

catch(Exception err)

{

return err.Message ;

}

}

}//end class

以上就是所用的代码,希望大家批判指正.
内容来自用户分享和网络整理,不保证内容的准确性,如有侵权内容,可联系管理员处理 点击这里给我发消息
标签: