怎么样通过I/O重叠结构发送端代码？

// client.cpp : Defines the class behaviors for the application.
//

#include "stdafx.h"
#include "winsock2.h"
#include "client.h"
#include "clientDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CClientApp

BEGIN_MESSAGE_MAP(CClientApp, CWinApp)
//{{AFX_MSG_MAP(CClientApp)
// NOTE - the ClassWizard will add and remove mapping macros here.
// DO NOT EDIT what you see in these blocks of generated code!
//}}AFX_MSG
ON_COMMAND(ID_HELP, CWinApp::OnHelp)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CClientApp construction

CClientApp::CClientApp()
{
// TODO: add construction code here,
// Place all significant initialization in InitInstance
}

/////////////////////////////////////////////////////////////////////////////
// The one and only CClientApp object

CClientApp theApp;

/////////////////////////////////////////////////////////////////////////////
// CClientApp initialization

BOOL CClientApp::InitInstance()
{
AfxEnableControlContainer();

// Standard initialization
// If you are not using these features and wish to reduce the size
// of your final executable, you should remove from the following
// the specific initialization routines you do not need.

#ifdef _AFXDLL
Enable3dControls();// Call this when using MFC in a shared DLL
#else
Enable3dControlsStatic();// Call this when linking to MFC statically
#endif

CClientDlg dlg;
m_pMainWnd = &dlg;
int nResponse = dlg.DoModal();
if (nResponse == IDOK)
{
// TODO: Place code here to handle when the dialog is
// dismissed with OK
}
else if (nResponse == IDCANCEL)
{
// TODO: Place code here to handle when the dialog is
// dismissed with Cancel
}

// Since the dialog has been closed, return FALSE so that we exit the
// application, rather than start the application's message pump.
return FALSE;
}

#if !defined(AFX_CLIENT_H__C825687A_20FA_4894_BB0D_991130B29BAB__INCLUDED_)
#define AFX_CLIENT_H__C825687A_20FA_4894_BB0D_991130B29BAB__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#ifndef __AFXWIN_H__
#error include 'stdafx.h' before including this file for PCH
#endif

#include "resource.h"// main symbols

/////////////////////////////////////////////////////////////////////////////
// CClientApp:
// See client.cpp for the implementation of this class
//

class CClientApp : public CWinApp
{
public:
CClientApp();

// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CClientApp)
public:
virtual BOOL InitInstance();
//}}AFX_VIRTUAL

// Implementation

//{{AFX_MSG(CClientApp)
// NOTE - the ClassWizard will add and remove member functions here.
// DO NOT EDIT what you see in these blocks of generated code !
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_CLIENT_H__C825687A_20FA_4894_BB0D_991130B29BAB__INCLUDED_)

// clientDlg.cpp : implementation file
//

#include "stdafx.h"
#include "iostream"
#include "winsock2.h"
#include "mswsock.h"
#include "client.h"
#include "clientDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

UINT SStreadproc(LPVOID lParam); //发送线程
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()

/////////////////////////////////////////////////////////////////////////////
// CClientDlg dialog

CClientDlg::CClientDlg(CWnd* pParent /*=NULL*/)
: CDialog(CClientDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CClientDlg)
// NOTE: the ClassWizard will add member initialization here
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CClientDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CClientDlg)
// NOTE: the ClassWizard will add DDX and DDV calls here
//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CClientDlg, CDialog)
//{{AFX_MSG_MAP(CClientDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CClientDlg message handlers

BOOL CClientDlg::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

// TODO: Add extra initialization here
WSADATA wsadata;
WSAStartup(MAKEWORD(2,2),&wsadata);
ZeroMemory(&SSoverlapped,sizeof(WSAOVERLAPPED));
SSeventnums=0;
Socket=WSASocket(AF_INET,SOCK_STREAM,0,NULL,0,WSA_FLAG_OVERLAPPED);
return TRUE; // return TRUE unless you set the focus to a control
}

void CClientDlg::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 CClientDlg::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 CClientDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}

void CClientDlg::OnButton1()
{
// TODO: Add your control notification handler code here
SOCKADDR_IN sockaddr;
sockaddr.sin_family=AF_INET;
sockaddr.sin_addr.s_addr=inet_addr("127.0.0.1");
sockaddr.sin_port=htons(8589);
if(connect(Socket,(PSOCKADDR)&sockaddr,sizeof(sockaddr))!=SOCKET_ERROR)
AfxMessageBox("连接服务器成功");
}

void CClientDlg::OnButton2()
{
// TODO: 发送数据的函数
char strdir[MAX_PATH];
char strpath[MAX_PATH];
BROWSEINFO bi={0};
bi.hwndOwner=this->GetSafeHwnd();
bi.pidlRoot=NULL;
bi.lpszTitle="请选择你要打开的路径";
bi.ulFlags=BIF_RETURNONLYFSDIRS|BIF_EDITBOX;
bi.pszDisplayName=strdir;
LPITEMIDLIST pidl=SHBrowseForFolder(&bi);
if (SHGetPathFromIDList(pidl,strpath))
{
CString filepath;
filepath.Format("%s",strpath); //得到要发送文件夹的路径
filepath=filepath+"//*.*";
CFileFind fileinfo;
BOOL bcontinue=fileinfo.FindFile(filepath);
while(bcontinue)
{
bcontinue=fileinfo.FindNextFile();
if(fileinfo.IsDirectory()!=TRUE&&fileinfo.IsDots()!=TRUE)
{
CString filename,strsize;
char Finfo[512];
CString str;
str=fileinfo.GetFilePath();
hfile=CreateFile(str,GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_ALWAYS,FILE_ATTRIBUTE_NORMAL,0);
filename=fileinfo.GetFileName();
int size=fileinfo.GetLength();
strsize.Format("%d",size);
filename=filename+"|"+strsize;
memcpy(Finfo,filename,filename.GetLength()+1);
WSABUF wsabuf;
DWORD flags=0;
DWORD nums;
wsabuf.len=filename.GetLength()+1;
wsabuf.buf=Finfo;
WSASend(Socket,&wsabuf,1,&nums,0,NULL,NULL);
AfxBeginThread(SStreadproc,NULL);
recv(Socket,Finfo,512,0);
}
}
}

}

UINT SStreadproc(LPVOID lParam)
{

CClientDlg *app=(CClientDlg*)AfxGetApp()->GetMainWnd();
TransmitFile(app->Socket,app->hfile,0,4096,NULL,NULL,0);
return 0;

}

// clientDlg.h : header file
//

#if !defined(AFX_CLIENTDLG_H__5E3CB425_D3D0_47D2_ACD6_DC3A70427604__INCLUDED_)
#define AFX_CLIENTDLG_H__5E3CB425_D3D0_47D2_ACD6_DC3A70427604__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

/////////////////////////////////////////////////////////////////////////////
// CClientDlg dialog

class CClientDlg : public CDialog
{
// Construction
public:
HANDLE hfile;
WSAOVERLAPPED SSoverlapped;
WSAEVENT SSeventarray[WSA_MAXIMUM_WAIT_EVENTS];
DWORD SSeventnums;
SOCKET Socket;
CClientDlg(CWnd* pParent = NULL);// standard constructor

// Dialog Data
//{{AFX_DATA(CClientDlg)
enum { IDD = IDD_CLIENT_DIALOG };
// NOTE: the ClassWizard will add data members here
//}}AFX_DATA

// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CClientDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX);// DDX/DDV support
//}}AFX_VIRTUAL

// Implementation
protected:
HICON m_hIcon;

// Generated message map functions
//{{AFX_MSG(CClientDlg)
virtual BOOL OnInitDialog();
afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
afx_msg void OnPaint();
afx_msg HCURSOR OnQueryDragIcon();
afx_msg void OnButton1();
afx_msg void OnButton2();
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_CLIENTDLG_H__5E3CB425_D3D0_47D2_ACD6_DC3A70427604__INCLUDED_)