VC6.0编写C/S消息传送程序

6.在程序菜单项中添加"本机IP地址":

void CServerView::OnIp() { int WSAReturn; WSAReturn=WSAStartup( 0x0101, &WSAData ); if( WSAReturn == 0 ){ gethostname( Hostname, 260 ); struct hostent *pHostEnt; HostEnt = gethostbyname( Hostname); if( pHostEnt != NULL ){ wsprintf( Hostaddress, "%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 ) ); CString out; out.Format(Hostaddress); AfxMessageBox(out); } } }

　　7.在程序菜单中添加"发送消息"：

void CServerView::OnSendmessage() {// TODO: Add your command handler code here char msg[2000]; Csend Sendmessage; if(Sendmessage.DoModal()== IDOK&&!Sendmessage.m_Message.IsEmpty()) { wsprintf(msg,"R: "+ Sendmessage.m_Message); sendto(m_sock,msg,1024,0, (PSOCKADDR)&saClnt,saClntLen); m_data[count++]=Sendmessage.m_Message; flag=TRUE; InvalidateRect(NULL); } }

　　8.为发送消息项添加一个对话框的类,名为send,有一个文本框,用来发送消息.并为文本框添加CString m_Message 变量,并在ServerView.cpp中添加#include "send.h"

　　9.为发送消息项添加一个判断函数:

void CServerView::OnUpdateSendmessage(CCmdUI* pCmdUI) {// TODO: Add your command update UI handler code here pCmdUI-　＞Enable(FALSE); if(Isconnect) pCmdUI- ＞Enable(TRUE); }

　　 10.再窗口显示消息:

void CServerView::OnDraw(CDC* pDC) { if(flag) { sizeTotal.cy+=20; for(int j=65;j< m_data[count-1].GetLength();j++) sizeTotal.cx+=15; OnInitialUpdate(); flag=FALSE; } CServerDoc* pDoc = GetDocument(); ASSERT_VALID(pDoc); int y=10; for(int i=0;i< count;i++) { pDC- ＞TextOut(10,y,m_data[i]); y+=20; } // TODO: add draw code for native data here }

　　11.在Project中点击Settings中选择Link项添加wsock32.lib.最后编译程序,就可以得到Server.exe程序.

　　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：

#include "winsock.h"

　　添加变量:

CString m_data[1000]; HANDLE m_hListenThread; SOCKET m_sock; SOCKADDR_IN m_saSrvr; BOOL Isconnect; int count; CSize sizeTotal; BOOL flag;

　　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，代码如上:

　　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); } }