C#语言编程 服务器端与客户端对话 源程序代码.docx
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C#语言编程服务器端与客户端对话源程序代码
usingSystem;
usingSystem.Collections.Generic;
usingSystem.Windows.Forms;
usingSystem.Net;
usingSystem.Net.Sockets;
usingSystem.Threading;
namespaceAsyncTcpServer
{
publicpartialclassFormServer:
Form
{
///保存连接的所有用户
privateListuserList=newList();
///使用的本机IP地址
IPAddresslocalAddress;
///监听端口
privateconstintport=51888;
privateTcpListenermyListener;
///是否正常退出所有接收线程
boolisExit=false;
publicFormServer()
{
InitializeComponent();
listBoxStatus.HorizontalScrollbar=true;
IPAddress[]addrIP=Dns.GetHostAddresses(Dns.GetHostName());
//localAddress=addrIP[0];
foreach(varipinaddrIP)
{
//判断是否为IPv4地址
if(ip.AddressFamily==AddressFamily.InterNetwork)
{
localAddress=ip;
break;
}
}
buttonStop.Enabled=false;
}
///【开始监听】按钮的Click事件
privatevoidbuttonStart_Click(objectsender,EventArgse)
{
myListener=newTcpListener(localAddress,port);
myListener.Start();
AddItemToListBox(string.Format("开始在{0}:
{1}监听客户连接",localAddress,port));
ThreadmyThread=newThread(ListenClientConnect);
myThread.Start();
buttonStart.Enabled=false;
buttonStop.Enabled=true;
}
///监听客户端请求
privatevoidListenClientConnect()
{
TcpClientnewClient=null;
while(true)
{
ListenClientDelegated=newListenClientDelegate(ListenClient);
IAsyncResultresult=d.BeginInvoke(outnewClient,null,null);
//使用轮询方式来判断异步操作是否完成
while(result.IsCompleted==false)
{
if(isExit)
{
break;
}
Thread.Sleep(250);
}
//获取Begin方法的返回值和所有输入/输出参数
d.EndInvoke(outnewClient,result);
if(newClient!
=null)
{
//每接受一个客户端连接,就创建一个对应的线程循环接收该客户端发来的信息
Useruser=newUser(newClient);
ThreadthreadReceive=newThread(ReceiveData);
threadReceive.Start(user);
userList.Add(user);
AddItemToListBox(string.Format("[{0}]进入",newClient.Client.RemoteEndPoint));
AddItemToListBox(string.Format("当前连接用户数:
{0}",userList.Count));
}
else
{
break;
}
}
}
privatedelegatevoidListenClientDelegate(outTcpClientclient);
///接受挂起的客户端连接请求
privatevoidListenClient(outTcpClientnewClient)
{
try
{
newClient=myListener.AcceptTcpClient();
}
catch
{
newClient=null;
}
}
///处理接收的客户端数据
privatevoidReceiveData(objectuserState)
{
Useruser=(User)userState;
TcpClientclient=user.client;
while(isExit==false)
{
stringreceiveString=null;
ReceiveMessageDelegated=newReceiveMessageDelegate(ReceiveMessage);
IAsyncResultresult=d.BeginInvoke(user,outreceiveString,null,null);
//使用轮询方式来判断异步操作是否完成
while(result.IsCompleted==false)
{
if(isExit)
{
break;
}
Thread.Sleep(250);
}
//获取Begin方法的返回值和所有输入/输出参数
d.EndInvoke(outreceiveString,result);
if(receiveString==null)
{
if(isExit==false)
{
AddItemToListBox(string.Format("与[{0}]失去联系,已终止接收该用户信息",client.Client.RemoteEndPoint));
RemoveUser(user);
}
break;
}
AddItemToListBox(string.Format("来自[{0}]:
{1}",user.client.Client.RemoteEndPoint,receiveString));
string[]splitString=receiveString.Split(',');
switch(splitString[0])
{
case"Login":
user.userName=splitString[1];
AsyncSendToAllClient(user,receiveString);
break;
case"Logout":
AsyncSendToAllClient(user,receiveString);
RemoveUser(user);
return;
case"Talk":
stringtalkString=receiveString.Substring(splitString[0].Length+splitString[1].Length+2);
AddItemToListBox(string.Format("{0}对{1}说:
{2}",
user.userName,splitString[1],talkString));
AsyncSendToClient(user,"talk,"+user.userName+","+talkString);
foreach(UsertargetinuserList)
{
if(target.userName==splitString[1]&&user.userName!
=splitString[1])
{
AsyncSendToClient(target,"talk,"+user.userName+","+talkString);
break;
}
}
break;
default:
AddItemToListBox("什么意思啊:
"+receiveString);
break;
}
}
}
delegatevoidReceiveMessageDelegate(Useruser,outstringreceiveMessage);
///接受客户端发来的信息
privatevoidReceiveMessage(Useruser,outstringreceiveMessage)
{
try
{
receiveMessage=user.br.ReadString();
}
catch(Exceptionex)
{
AddItemToListBox(ex.Message);
receiveMessage=null;
}
}
///异步发送message给user
privatevoidAsyncSendToClient(Useruser,stringmessage)
{
SendToClientDelegated=newSendToClientDelegate(SendToClient);
IAsyncResultresult=d.BeginInvoke(user,message,null,null);
while(result.IsCompleted==false)
{
if(isExit)
{
break;
}
Thread.Sleep(250);
}
d.EndInvoke(result);
}
privatedelegatevoidSendToClientDelegate(Useruser,stringmessage);
///发送message给user
privatevoidSendToClient(Useruser,stringmessage)
{
try
{
//将字符串写入网络流,此方法会自动附加字符串长度前缀
user.bw.Write(message);
user.bw.Flush();
AddItemToListBox(string.Format("向[{0}]发送:
{1}",
user.userName,message));
}
catch
{
AddItemToListBox(string.Format("向[{0}]发送信息失败",
user.userName));
}
}
///异步发送信息给所有客户
privatevoidAsyncSendToAllClient(Useruser,stringmessage)
{
stringcommand=message.Split(',')[0].ToLower();
if(command=="login")
{
for(inti=0;i{
AsyncSendToClient(userList[i],message);
if(userList[i].userName!
=user.userName)
{
AsyncSendToClient(user,"login,"+userList[i].userName);
}
}
}
elseif(command=="logout")
{
for(inti=0;i{
if(userList[i].userName!
=user.userName)
{
AsyncSendToClient(userList[i],message);
}
}
}
}
///移除用户
privatevoidRemoveUser(Useruser)
{
userList.Remove(user);
user.Close();
AddItemToListBox(string.Format("当前连接用户数:
{0}",userList.Count));
}
privatedelegatevoidAddItemToListBoxDelegate(stringstr);
///在ListBox中追加状态信息
///要追加的信息
privatevoidAddItemToListBox(stringstr)
{
if(listBoxStatus.InvokeRequired)
{
AddItemToListBoxDelegated=AddItemToListBox;
listBoxStatus.Invoke(d,str);
}
else
{
listBoxStatus.Items.Add(str);
listBoxStatus.SelectedIndex=listBoxStatus.Items.Count-1;
listBoxStatus.ClearSelected();
}
}
///【停止监听】按钮的Click事件
privatevoidbuttonStop_Click(objectsender,EventArgse)
{
AddItemToListBox("开始停止服务,并依次使用户退出!
");
isExit=true;
for(inti=userList.Count-1;i>=0;i--)
{
RemoveUser(userList[i]);
}
//通过停止监听让myListener.AcceptTcpClient()产生异常退出监听线程
myListener.Stop();
buttonStart.Enabled=true;
buttonStop.Enabled=false;
}
///关闭窗口时触发的事件
privatevoidMainForm_FormClosing(objectsender,FormClosingEventArgse)
{
if(myListener!
=null)
{
//引发buttonStop的Click事件
buttonStop.PerformClick();
}
}
}
}
usingSystem;
usingSystem.ComponentModel;
usingSystem.Windows.Forms;
usingSystem.Net;
usingSystem.Net.Sockets;
usingSystem.Threading;
usingSystem.IO;
namespaceAsyncTcpClient
{
publicpartialclassFormClient:
Form
{
//是否正常退出
privateboolisExit=false;
privateTcpClientclient;
privateBinaryReaderbr;
privateBinaryWriterbw;
//BackgroundWorkerconnectWork=newBackgroundWorker();
publicFormClient()
{
InitializeComponent();
this.StartPosition=FormStartPosition.CenterScreen;
Randomr=newRandom((int)DateTime.Now.Ticks);
textBoxUserName.Text="user"+r.Next(100,999);
listBoxOnline.HorizontalScrollbar=true;
//connectWork.DoWork+=newDoWorkEventHandler(connectWork_DoWork);
//connectWork.RunWorkerCompleted+=
//newRunWorkerCompletedEventHandler(connectWork_RunWorkerCompleted);
//ConnectToServer();
}
///异步方式与服务器进行连接
voidConnectToServer()
{
client=newTcpClient();
//此处仅为方便本机调试,实际使用时要将Dns.GetHostName()改为服务器域名
IAsyncResultresult=client.BeginConnect(Dns.GetHostName(),51888,null,null);
while(result.IsCompleted==false)
{
Thread.Sleep(100);
AddStatus(".");
}
try
{
client.EndConnect(result);
AddStatus("连接成功");
//获取网络流
NetworkStreamnetworkStream=client.GetStream();
//将网络流作为二进制读写对象
br=newBinaryReader(networkStream);
bw=newBinaryWriter(networkStream);
AsyncSendMessage("Login,"+textBoxUserName.Text);
ThreadthreadReceive=newThread(newThreadStart(ReceiveData));
threadReceive.IsBackground=true;
threadReceive.Start();
}
catch(Exceptionex)
{
AddStatus("连接失败:
"+ex.Message);
buttonConnect.Enabled=true;
}
}
///
///【连接服务器】按钮的Click事件
///
privatevoidbuttonConnect_Click(objectsender,EventArgse)
{
buttonConnect.Enabled=false;
AddStatus("开始连接.");
ConnectToServer();
}
///处理接收的服务器端数据
privatevoidReceiveData()
{
stringreceiveString=null;
while(isExit==false)
{
ReceiveMessageDelegated=newReceiveMessageDelegate(ReceiveMessage);
IAsyncResultresult=d.BeginInvoke(outreceiveString,null,null);
//使用轮询方式来判断异步操作是否完成
while(result.IsCompleted==false)
{
if(isExit)
{
break;
}
Thread.Sleep(250);
}
//获取Begin方法的返回值和所有输入/输出参数
d.EndInvoke(outreceiveString,result);
if(receiveString==null)
{
if(isExit==false)
{
MessageBox.Show("与服务器失去联系。
");
}
break;
}
string[]splitString=receiveString.Split(',');
stringcommand=splitString[0].ToLower();
switch(command)
{
case"login":
//格式:
login,用户名
AddOnline(splitString[1]);
break;
case"logout":
//格式:
logout,用户名
RemoveUserName(splitString[1]);
break;
case"talk":
//格式:
talk,用户名,对话信息
AddTalkMessage(splitString[1]+":
\r\n");
AddTalkMessage(receiveString.Substring(
splitString[0].Length+splitString[1].Length+2));
break;
}
}
Application.Exit();
}
///