零基础学Visual.C....教案PPT.随书光盘-452M.zip

				// ClientSocket.cpp : implementation file
				//
				
				#include "stdafx.h"
				#include "Ch14Demo3Client.h"
				#include "ClientSocket.h"
				#include "Ch14Demo3ClientDlg.h "
				#ifdef _DEBUG
				#define new DEBUG_NEW
				#undef THIS_FILE
				static char THIS_FILE[] = __FILE__;
				#endif
				
				/////////////////////////////////////////////////////////////////////////////
				// CClientSocket
				
				CClientSocket::CClientSocket()
				{
					//初始化变量
					m_nLength=0;
					memset(m_szBuffer,0,sizeof(m_szBuffer));
					m_bConnected=FALSE;
				}
				
				CClientSocket::~CClientSocket()
				{
					//如果套接字有效，则关闭套接字
					if(m_hSocket!=INVALID_SOCKET)
					Close();
				}
				
				
				// Do not edit the following lines, which are needed by ClassWizard.
				#if 0
				BEGIN_MESSAGE_MAP(CClientSocket, CAsyncSocket)
					//{{AFX_MSG_MAP(CClientSocket)
					//}}AFX_MSG_MAP
				END_MESSAGE_MAP()
				#endif	// 0
				
				/////////////////////////////////////////////////////////////////////////////
				// CClientSocket member functions
				
				void CClientSocket::OnReceive(int nErrorCode) 
				{
					// TODO: Add your specialized code here and/or call the base class
					m_nLength=Receive(m_szBuffer,sizeof(m_szBuffer),0);
					//下面两行代码用来获取对话框指针
					CCh14Demo3ClientApp* pApp=(CCh14Demo3ClientApp*)AfxGetApp();
					CCh14Demo3ClientDlg* pDlg=(CCh14Demo3ClientDlg*)pApp->m_pMainWnd;
					pDlg->m_MsgR.InsertString(0,m_szBuffer);//列表框添加接收的数据
					memset(m_szBuffer,0,sizeof(m_szBuffer));//清除缓冲区数据
					CAsyncSocket::OnReceive(nErrorCode);
				}
				
				void CClientSocket::OnSend(int nErrorCode) 
				{
					// TODO: Add your specialized code here and/or call the base class
					Send(m_szBuffer,m_nLength,0);//发送数据
					m_nLength=0;
					memset(m_szBuffer,0,sizeof(m_szBuffer));//清除缓冲区数据
					//继续提请一个"读"的网络事件，接收Server消息
					AsyncSelect(FD_READ);
					CAsyncSocket::OnSend(nErrorCode);
				}
				
				void CClientSocket::OnConnect(int nErrorCode) 
				{
					// TODO: Add your specialized code here and/or call the base class
					if (nErrorCode==0)//连接成功
					{
						m_bConnected=TRUE;
						//下面两行代码用来获取对话框指针
						CCh14Demo3ClientApp* pApp=(CCh14Demo3ClientApp*)AfxGetApp();
						CCh14Demo3ClientDlg* pDlg=(CCh14Demo3ClientDlg*)pApp->m_pMainWnd;
						memcpy(m_szBuffer,"连接到： ",13);
						strncat(m_szBuffer,pDlg->m_szServerAdr,sizeof(pDlg->m_szServerAdr));
						pDlg->m_MsgR.InsertString(0,m_szBuffer);
						pDlg->GetDlgItem(IDC_SEND)->EnableWindow(true);
						AsyncSelect(FD_READ);  //提请一个"读"的网络事件，准备接收
					}
					CAsyncSocket::OnConnect(nErrorCode);
				}