现在介绍客户机程序:
1.创建一个名为"client"的项目,单文档界面.
2.在clientview.h中加入代码：
添加变量:
CString m_data[1000];
HANDLE m_hListenThread;
SOCKET m_sock;
SOCKADDR_IN m_saSrvr;
BOOLIsconnect;
int count;
CSize sizeTotal;
BOOLflag; |
3.在构造函数中初始化变量:
CClientView::CClientView()
{
// TODO: add construction code here
Isconnect=FALSE;
sizeTotal.cy=350;
sizeTotal.cx=300;
flag=FALSE;
} |
4.在析构函数中完成清除操作:
CClientView::~CClientView()
{
if(m_bInitialized)
WSACleanup();
closesocket(m_sock);
if(m_hListenThread)
::TerminateThread(m_hListenThread,0);
} |
5.在菜单中添加"拨号"项:
void CClientView::OnDial()
{
// TODO: Add your command handler code here
count=5;
if(m_bInitialized)
{
AfxMessageBox("Already dialing");
return;
}
Cdial dial;
if(dial.DoModal()==IDOK&&!dial.m_HostAddress.IsEmpty())
{
m_saSrvr.sin_family=AF_INET;
m_saSrvr.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
m_saSrvr.sin_addr.S_un.S_addr=inet_addr(dial.m_HostAddress);
m_saSrvr.sin_port=htons(5050);
int status;
WSADATA wsaData;
m_data[0]="initializing Windows Sockets DLL....";
if((status=WSAStartup(0x0101,&wsaData))==0)
{
m_data[0]+="Succeeded";
m_bInitialized=TRUE;
}
else
{
m_bInitialized=FALSE;
}
m_sock=socket(AF_INET,SOCK_DGRAM,0);
m_data[1]="Creating socket....";
if(m_sock==INVALID_SOCKET)
{
m_data[1]+="Failed";
}
m_data[1]+="Succeeded";
m_data[2]="Binding socket....";
sockaddr_in sa;
sa.sin_family=AF_INET;
sa.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
sa.sin_port=htons(0);
if(bind(m_sock,(PSOCKADDR)&sa, sizeof(sa))==SOCKET_ERROR)
{
m_data[2]+="Failed";
closesocket(m_sock);
}
m_data[2]+="Succeeded";
m_data[3]="Creating listener thread....";
unsigned long idThread;
m_hListenThread=CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)Listen,(void *)this,0,&idThread);
if(m_hListenThread)
{
m_data[3]+="Succeeded";
m_data[4]+="Waiting....";
}
else
m_data[4]+="Failed";
InvalidateRect(NULL);
}
} |
6.添加一个拨号对话框,名为dial,有一个文本框用来写IP地址.并在clientview.cpp中添加代码:
7.在拨号项添加一个判断函数:
void CClientView::OnUpdateDial
(CCmdUI* pCmdUI)
{
// TODO: Add your command update
UI handler code here
pCmdUI->Enable(TRUE);
if(Isconnect)
pCmdUI->Enable(FALSE);
} |
8.添加接收与发送消息的线程:
long WINAPI Listen(CClientView *pView)
{
char msg[2000];
pView- >m_data[5]="Sending ATTACH command";
pView- >InvalidateRect(NULL);
wsprintf(msg,"A: ");
sendto(pView- >m_sock,msg,1024,0,(PSOCKADDR)&pView- >m_saSrvr,sizeof(pView- >m_saSrvr));
int saSrvrLen ,nchar;
while(1)
{
saSrvrLen=sizeof(pView->m_saSrvr);
nchar=recvfrom(pView- >m_sock,msg,1024,0,(PSOCKADDR)&pView- >m_saSrvr,&saSrvrLen);
if(nchar<0) { pView->m_data[pView- >count++]="Error in recvform";
pView- >InvalidateRect(NULL);
}
else
{
pView->m_data[pView- >count++]=msg;
pView->Isconnect=TRUE;
pView->flag=TRUE;
pView->InvalidateRect(NULL);
}
}
return(0);
} |
9.同主程序一样做一个发送消息项,代码如上.
10.显示程序也与主程序一样，代码如上。
11.在Project中点击Settings中选择Link项添加wsock32.lib。
12.编译程序便可得到client.exe程序。
server.exe 和 client.exe 做完后,就可以在具有TCP/IP协议下的网络中执行。通过上面的例子,你可以很快了解vc++网络编程(www.cppentry.com)的优点，你还可以添加其它功能项,在这我就不多加叙述了。希望我的程序能起到抛砖引玉的目的,让我们都能编出好的网络程序。 |