Question

C#如何显示出socket发送内容

如题 如何在服务器上显示出目前在线的客户端 同时如果客户端发送一个信息（因为不是局域网所以我用的是TCP协议）比如byte[]数组。如何接收到此信息立即显示出来
我的服务器端代码
============================================================
private void startServer()
{
//创建一个网络终结点 IP+端口号
IPEndPoint ipep = new IPEndPoint(IPAddress.Any,int.Parse("9527"));
MessageBox.Show("IP地址为："+IPAddress.Any);

//创建一个套接字
Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
server.Bind(ipep);//绑定终结点
server.Listen(10);//开始监听
Socket linkclient = server.Accept();
}
===========================================================
客户端代码
private void Bt_Send_Click(object sender, EventArgs e)
{ byte[] sendstring = System.Text.Encoding.Default.GetBytes(this.textBox1 .Text .Trim());
IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), int.Parse("9527"));
Socket client=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
client.Connect(ipep);
client.SendTo(sendstring ,ipep);
}

Answer 1

startServer()只是构建服务器然后启动监听。

但你没有对监听到得连接进行处理啊？

socket.BeginReceive()这个方法是异步接受消息的。参数中有个byte[]。意思就是将接收到的消息放入该byte[]中。然后将byte[]转成字符串输入就可以了

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Answer 2

1.简单服务器
//#include <winsock2.h>
//#pragma comment(lib,"WS2_32.lib")
WSADATA wsd;
static UINT port=%%1;
UINT Listen(LPVOID pParam)
{
SOCKET sServer,sClient;
char buf[1024];
int retVal;
if(WSAStartup(MAKEWORD(2,2),&wsd)!=0)
{
return -1;//失败
}
sServer=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
if(INVALID_SOCKET==sServer)
{
WSACleanup();
return -1;//创建套接字失败
}
SOCKADDR_IN addrServ;
addrServ.sin_family=AF_INET;
addrServ.sin_port=htons((short)pParam);
addrServ.sin_addr.s_addr=INADDR_ANY;
retVal=bind(sServer,(LPSOCKADDR)&addrServ,sizeof(SOCKADDR_IN));
if(SOCKET_ERROR==retVal)
{
closesocket(sServer);
WSACleanup();
return -1;//绑定套接字失败
}
retVal=listen(sServer,1);
if(SOCKET_ERROR==retVal)
{
closesocket(sServer);
WSACleanup();
return -1;//开始监听失败
}
sockaddr_in addrClient;
int addrClientlen=sizeof(addrClient);
sClient=accept(sServer,(sockaddr FAR*)&addrClient,&addrClientlen);
if(INVALID_SOCKET==sClient)
{
closesocket(sServer);
WSACleanup();
return -1;//开始接受客户端连接失败
}
ZeroMemory(buf,sizeof(buf));
retVal=recv(sClient,buf,sizeof(buf),0);
if(SOCKET_ERROR==retVal)
{
closesocket(sServer);
closesocket(sClient);
WSACleanup();
return -1;//接收数据失败
}
CString %%2(buf);
closesocket(sServer);
closesocket(sClient);
WSACleanup();
return 0;
}
CWinThread *pThread=AfxBeginThread(Listen,&port);

2.简单客户端
//#include <winsock2.h>
//#pragma comment(lib,"WS2_32.lib")
WSADATA wsd;
SOCKET sHost;
SOCKADDR_IN servAddr;
char buf[1024];
int retVal;
if(WSAStartup(MAKEWORD(2,2),&wsd)!=0)
{
return -1;//失败
}
sHost=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
if(INVALID_SOCKET==sHost)
{
WSACleanup();
return -1;//创建套接字失败
}
servAddr.sin_family=AF_INET;
servAddr.sin_addr.s_addr=inet_addr(%%3);
servAddr.sin_port=htons((short)%%2);
int nServAddlen=sizeof(servAddr);
retVal=connect(sHost,(LPSOCKADDR)&servAddr,sizeof(servAddr));
if(SOCKET_ERROR==retVal) {
closesocket(sHost);
WSACleanup();
return -1;//连接服务器失败
}
ZeroMemory(buf,sizeof(buf));
strcpy(buf,%%3);
retVal=send(sHost,buf,sizeof(buf),0);
if(SOCKET_ERROR==retVal)
{
closesocket(sHost);
WSACleanup();
return -1;//向服务器发送数据失败
}
closesocket(sHost);
WSACleanup();

3.获得本机IP
//#include <winsock2.h>
//#pragma comment(lib,"WS2_32.lib")
WSADATA wsd;
if(WSAStartup(MAKEWORD(2,2),&wsd)!=0)
{
return -1;//失败
}
char szHostname[100],szHostaddress[200];
if(gethostname(szHostname,sizeof(szHostname))!=SOCKET_ERROR)
{
HOSTENT *pHostEnt=gethostbyname(szHostname);
if(pHostEnt!=NULL){
sprintf(szHostaddress,"%d.%d.%d.%d",
( pHostEnt->h_addr_list[0][0]&0x00ff ),
( pHostEnt->h_addr_list[0][1]&0x00ff ),
( pHostEnt->h_addr_list[0][2]&0x00ff ),
( pHostEnt->h_addr_list[0][3]&0x00ff ));
}
}
else
return;
CString %%1(szHostaddress);

Answer 3

startServer()只是启动了服务器socket，没有绑定异步IO事件，也没有用同步方法。server.accept()得到linkclient以后，要开启新线程，接收linkclient发来的消息。

Answer 4

先加分，我帮你

Answer 5

服务端代码加上下面代码：
clientsocket = linkclient;
clientservice = new Thread(new ThreadStart(ServiceClient));
clientservice.Start();

private void ServiceClient()
{
Socket client = clientsocket;
bool keepalive = true;
Byte[] buffer = new Byte[1024];

while(keepalive)
{
bufLen = client.Available;
client.Receive(buffer, 0, bufLen, SocketFlags.None);
if (bufLen == 0)
continue;
string clientcommand = Encoding.Default.GetString(buffer).Substring(0, bufLen).Trim();
Console.WriteLine(clientcommand);
}
}