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至顶网软件频道基础软件利用MFC的Csocket类实现网络通信

利用MFC的Csocket类实现网络通信

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本实例重点介绍使用MFC的CSocket类编写网络通讯程序的方法。

作者:刘涛 来源:天极开发 2007年10月16日

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三、程序代码

////////////////////////////////////////////////// NewSocket.h : header file
#if !defined(AFX_NEWSOCKET_H__8CE2ED73_1D56_11D3_9928_00A0C98F3E85__INCLUDED_)
#define AFX_NEWSOCKET_H__8CE2ED73_1D56_11D3_9928_00A0C98F3E85__INCLUDED_
#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000
class CTestDlg;
#include <afxsock.h>

class CNewSocket : public CSocket
{
// Attributes
public:

// Operations
public:
CNewSocket();
virtual ~CNewSocket();

// Overrides
public:
int m_Status;
void GetDlg(CTestDlg *dlg);
CTestDlg *m_dlg;
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CNewSocket)
public:
virtual void OnAccept(int nErrorCode);
virtual void OnReceive(int nErrorCode);
virtual void OnClose(int nErrorCode);
//}}AFX_VIRTUAL
// Generated message map functions
//{{AFX_MSG(CNewSocket)
// NOTE - the ClassWizard will add and remove member functions here.
//}}AFX_MSG
// Implementation
protected:
};
#endif

//////////////////////////////////////////////////////// NewSocket.cpp : implementation file
#include "stdafx.h"
#include "Test.h"
#include "NewSocket.h"
#include "TestDlg.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

CNewSocket::CNewSocket()
{}

CNewSocket::~CNewSocket()
{}

#if 0
BEGIN_MESSAGE_MAP(CNewSocket, CSocket)
//{{AFX_MSG_MAP(CNewSocket)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
#endif // 0

void CNewSocket::OnAccept(int nErrorCode)
{
 if (m_dlg->m_ClientSocket==NULL) m_dlg->OnAccept();
 CSocket::OnAccept(nErrorCode);
}

void CNewSocket::OnReceive(int nErrorCode)
{
 m_dlg->OnReceive();
 CSocket::OnReceive(nErrorCode);
}

void CNewSocket::GetDlg(CTestDlg *dlg)
{
 m_dlg=dlg;
}

void CNewSocket::OnClose(int nErrorCode)
{
 m_dlg->OnClose();
 CSocket::OnClose(nErrorCode);
}

///////////////////////////////////////////////////////////////// TestDlg.h : header file
#if !defined(AFX_TESTDLG_H__EDDDE196_1BF1_11D3_BE77_0000B454AEE4__INCLUDED_)
#define AFX_TESTDLG_H__EDDDE196_1BF1_11D3_BE77_0000B454AEE4__INCLUDED_
#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000
#include "NewSocket.h"

class CTestDlg : public CDialog
{
 // Construction
 public:
  void SocketReset();
  void OnClose();
  void OnReceive();
  void OnAccept();
  CSocketFile *m_file;
  CArchive *m_arOut;
  CArchive *m_arIn;
  CNewSocket* m_ServerSocket;
  CNewSocket* m_ClientSocket;
  CTestDlg(CWnd* pParent = NULL); // standard constructor
  // Dialog Data
  //{{AFX_DATA(CTestDlg)
  enum { IDD = IDD_TEST_DIALOG };
  CString m_Info;
  CString m_Output;
  CString m_Input;
  CString m_Connect;
  CString m_IPAddress;
  UINT m_Port;
  int m_Status;
  //}}AFX_DATA
  // ClassWizard generated virtual function overrides
  //{{AFX_VIRTUAL(CTestDlg)
 protected:
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
  //}}AFX_VIRTUAL
  // Implementation
 protected:
  HICON m_hIcon;
  // Generated message map functions
  //{{AFX_MSG(CTestDlg)
  virtual BOOL OnInitDialog();
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
  afx_msg void OnPaint();
  afx_msg HCURSOR OnQueryDragIcon();
  afx_msg void OnConnect();
  afx_msg void OnDisconnect();
  afx_msg void OnSend();
  afx_msg void OnServerradio();
  afx_msg void OnClientradio();
  afx_msg void OnSendclear();
  afx_msg void OnReceiveclear();
  //}}AFX_MSG
  DECLARE_MESSAGE_MAP()
 };
#endif

//////////////////////////////////////////////////////////////// TestDlg.cpp : implementation file
#include "stdafx.h"
#include "Test.h"
#include "TestDlg.h"
#include <afxsock.h>
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

class CAboutDlg : public CDialog
{
 public:
  CAboutDlg();
  // Dialog Data
  //{{AFX_DATA(CAboutDlg)
   enum { IDD = IDD_ABOUTBOX };
  //}}AFX_DATA
  // ClassWizard generated virtual function overrides
  //{{AFX_VIRTUAL(CAboutDlg)
 protected:
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
  //}}AFX_VIRTUAL
  // Implementation
 protected:
  //{{AFX_MSG(CAboutDlg)
  //}}AFX_MSG
 DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
 //{{AFX_DATA_INIT(CAboutDlg)
 //}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
 CDialog::DoDataExchange(pDX);
 //{{AFX_DATA_MAP(CAboutDlg)
 //}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
 //{{AFX_MSG_MAP(CAboutDlg)
 // No message handlers
 //}}AFX_MSG_MAP
END_MESSAGE_MAP()

CTestDlg::CTestDlg(CWnd* pParent /*=NULL*/)
: CDialog(CTestDlg::IDD, pParent)
{
 //{{AFX_DATA_INIT(CTestDlg)
  m_Info = _T("");
  m_Output = _T("");
  m_Input = _T("");
  m_Connect = _T("");
  m_IPAddress = _T("");
  m_Port = 0;
  m_Status = -1;
 //}}AFX_DATA_INIT
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CTestDlg::DoDataExchange(CDataExchange* pDX)
{
 CDialog::DoDataExchange(pDX);
 //{{AFX_DATA_MAP(CTestDlg)
  DDX_Text(pDX, IDC_OUTPUTEDIT, m_Output);
  DDX_Text(pDX, IDC_INPUTEDIT, m_Input);
  DDX_Text(pDX, IDC_CONNECTEDIT, m_Connect);
  DDX_Text(pDX, IDC_IPADDRESS, m_IPAddress);
  DDV_MaxChars(pDX, m_IPAddress, 15);
  DDX_Text(pDX, IDC_PORT, m_Port);
  DDX_Radio(pDX, IDC_SERVERRADIO, m_Status);
 //}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CTestDlg, CDialog)
//{{AFX_MSG_MAP(CTestDlg)
 ON_WM_SYSCOMMAND()
 ON_WM_PAINT()
 ON_WM_QUERYDRAGICON()
 ON_BN_CLICKED(IDC_CONNECTBUTTON, OnConnect)
 ON_BN_CLICKED(IDC_DISCONNECTBUTTON, OnDisconnect)
 ON_BN_CLICKED(IDC_SENDBUTTON, OnSend)
 ON_BN_CLICKED(IDC_SERVERRADIO, OnServerradio)
 ON_BN_CLICKED(IDC_CLIENTRADIO, OnClientradio)
 ON_BN_CLICKED(IDC_SENDCLEARBUTTON, OnSendclear)
 ON_BN_CLICKED(IDC_RECEIVECLEARBUTTON, OnReceiveclear)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

BOOL CTestDlg::OnInitDialog()
{
 CDialog::OnInitDialog();
 // Add "About..." menu item to system menu.
 // IDM_ABOUTBOX must be in the system command range.
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
 ASSERT(IDM_ABOUTBOX < 0xF000);
 CMenu* pSysMenu = GetSystemMenu(FALSE);
 if (pSysMenu != NULL)
 {
  CString strAboutMenu;
  strAboutMenu.LoadString(IDS_ABOUTBOX);
  if (!strAboutMenu.IsEmpty())
  {
   pSysMenu->AppendMenu(MF_SEPARATOR);
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
  }
 }
 // Set the icon for this dialog. The framework does this automatically
 // when the application's main window is not a dialog
 SetIcon(m_hIcon, TRUE); // Set big icon
 SetIcon(m_hIcon, FALSE); // Set small icon
 m_Status=-1;
 m_ServerSocket=NULL;
 m_ClientSocket=NULL;
 m_arIn=NULL;
 m_arOut=NULL;
 m_file=NULL;
 m_Connect="";
 m_IPAddress="202.207.243.29";
 m_Port=5000;
 GetDlgItem(IDC_IPADDRESS)->EnableWindow(FALSE);
 GetDlgItem(IDC_PORT)->EnableWindow(FALSE);
 UpdateData(FALSE);
 return TRUE; // return TRUE unless you set the focus to a control
}

void CTestDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
 if ((nID & 0xFFF0) == IDM_ABOUTBOX)
 {
  CAboutDlg dlgAbout;
  dlgAbout.DoModal();
 }
 else
 {
  CDialog::OnSysCommand(nID, lParam);
 }
}

// If you add a minimize button to your dialog, you will need the code below
// to draw the icon. For MFC applications using the document/view model,
// this is automatically done for you by the framework.
void CTestDlg::OnPaint()
{
 if (IsIconic())
 {
  CPaintDC dc(this); // device context for painting
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);
  // Center icon in client rectangle
  int cxIcon = GetSystemMetrics(SM_CXICON);
  int cyIcon = GetSystemMetrics(SM_CYICON);
  CRect rect;
  GetClientRect(&rect);
  int x = (rect.Width() - cxIcon + 1) / 2;
  int y = (rect.Height() - cyIcon + 1) / 2;
  // Draw the icon
  dc.DrawIcon(x, y, m_hIcon);
 }
 else
 {
  CDialog::OnPaint();
 }
}

// The system calls this to obtain the cursor to display while the user drags
// the minimized window.
HCURSOR CTestDlg::OnQueryDragIcon()
{
 return (HCURSOR) m_hIcon;
}

void CTestDlg::OnConnect()
{
 CString msg;
 UpdateData(TRUE);
 if (m_Status==0 ) //server
 {
  if ( m_ServerSocket!=NULL)
  {
   m_Connect="Please disconnect!";
   UpdateData(FALSE);
  }
  else
  {
   m_Connect="Waiting for Client...";
   UpdateData(FALSE);
   if(!AfxSocketInit())
   {
    MessageBox("WindowsSocket initial failed!","Send",MB_ICONSTOP);
    return;
   }
   m_ServerSocket=new CNewSocket;
   m_ServerSocket->m_Status=m_Status;
   m_ServerSocket->GetDlg(this);
   if(!m_ServerSocket->Create(m_Port))
     MessageBox("SendSocket create failed!", "Send",MB_ICONSTOP);
   else
   {
    m_ServerSocket->Listen();
   }
  }
 }
 else
 {
  if (m_Status==1)
  {
   if (m_ClientSocket!=NULL)
   {
    m_Connect="Please disconnect!";
    UpdateData(FALSE);
   }
   else
   {
    m_Connect="Connect to the Server...";
    UpdateData(FALSE);
    if(!AfxSocketInit())
    {
     MessageBox("WindowsSocket initial failed!","Receive",MB_ICONSTOP);
     return;
    }  
    m_ClientSocket=new CNewSocket;
    m_ClientSocket->GetDlg(this);
    m_ClientSocket->m_Status=m_Status;
    if(!m_ClientSocket->Create())
    {
     MessageBox("ReceiveSocket create failed!","Receive",MB_ICONSTOP);
     return;
    }
    else
    {
     if (!m_ClientSocket->Connect(m_IPAddress,m_Port))
     {
      CString str=m_Connect;
      SocketReset();
      m_Connect=str;
      m_Connect+="Error!";
      UpdateData(FALSE);
     }
     else
     {
      m_Connect+="OK!";
      m_file=new CSocketFile(m_ClientSocket);
      m_arIn=new CArchive(m_file, CArchive::load);
      m_arOut=new CArchive(m_file, CArchive::store);
     }
     UpdateData(FALSE);
    }
   }
  }
 }
 if (m_Status==-1)
 {
  msg="Please choose the status!";
  AfxMessageBox(msg);
 }
}

void CTestDlg::OnSend()
{
 if (m_arOut)
 {
  if (m_Status==0)
  {
   UpdateData(TRUE);
   *m_arOut<<m_Output;
   m_arOut->Flush();
  }
  else
  {
   UpdateData(TRUE);
   *m_arOut<<m_Output;
   m_arOut->Flush();
  }
 }
 else AfxMessageBox("Not connected!");
}

void CTestDlg::OnAccept()
{
 m_Connect+="OK!";
 UpdateData(FALSE);
 m_ClientSocket=new CNewSocket;
 m_ClientSocket->GetDlg(this);
 m_ServerSocket->Accept(*m_ClientSocket);
 m_ClientSocket->m_Status=m_ServerSocket->m_Status;
 m_file=new CSocketFile(m_ClientSocket);
 m_arIn=new CArchive(m_file, CArchive::load);
 m_arOut=new CArchive(m_file, CArchive::store);
}

void CTestDlg::OnReceive()
{
 *m_arIn>>m_Input;
 UpdateData(FALSE);
}

void CTestDlg::OnDisconnect()
{
 if (m_arOut!=NULL)
 {
  SocketReset();
  m_Connect="Disconnected!";
  UpdateData(FALSE);
 }
}

void CTestDlg::OnClose()
{
 if (m_ClientSocket->m_Status==0) m_Connect="Client ";
 else m_Connect="Server ";
 m_Connect+="has disconnected!";
 UpdateData(FALSE);
}

void CTestDlg::SocketReset()
{
 if (m_arIn!=NULL)
 {
  delete m_arIn;
  m_arIn=NULL;
 }
 if (m_arOut!=NULL)
 {
  delete m_arOut;
  m_arOut=NULL;
 }
 if (m_file!=NULL)
 {
  delete m_file;
  m_file=NULL;
 }
 if (m_ClientSocket!=NULL)
 {
  delete m_ClientSocket;
  m_ClientSocket=NULL;
 }
 if (m_ServerSocket!=NULL)
 {
  delete m_ServerSocket;
  m_ServerSocket=NULL;
 }
 m_Connect="";
 UpdateData(FALSE);
}

void CTestDlg::OnServerradio()
{
 UpdateData(TRUE);
 GetDlgItem(IDC_IPADDRESS)->EnableWindow(FALSE);
 GetDlgItem(IDC_PORT)->EnableWindow(TRUE);
 UpdateData(FALSE);
}

void CTestDlg::OnClientradio()
{
 UpdateData(TRUE);
 GetDlgItem(IDC_IPADDRESS)->EnableWindow(TRUE);
 GetDlgItem(IDC_PORT)->EnableWindow(TRUE);
 UpdateData(FALSE);
}

void CTestDlg::OnSendclear()
{
 m_Output="";
 UpdateData(FALSE);
}

void CTestDlg::OnReceiveclear()
{
 m_Input="";
 UpdateData(FALSE);
}

  四、小结

  本实例介绍了CAsyncSocket、CSocket类,并通过使用CSocket类实现了网络聊天程序。读者朋友还可以通过MFC CArchive 对象进行信息的接发操作,使得网络传输如同使用MFC的文档连载协议(Serialization protocol),简捷易用。

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