filemappingdlg.cpp

Visual.C++程序设计技巧与实例--配套光盘 第6章 文件和系统操作 本章共11个实例： 1. FolderCopy文件夹的选择和拷贝 2. DeleteCertainFile删除指定路

// FileMappingDlg.cpp : implementation file
//

#include "stdafx.h"
#include "FileMapping.h"
#include "FileMappingDlg.h"

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

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

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()

/////////////////////////////////////////////////////////////////////////////
// CFileMappingDlg dialog

CFileMappingDlg::CFileMappingDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CFileMappingDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CFileMappingDlg)
		// 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 CFileMappingDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CFileMappingDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CFileMappingDlg, CDialog)
	//{{AFX_MSG_MAP(CFileMappingDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_SEND, OnSend)
	ON_BN_CLICKED(IDC_RECEIVE, OnReceive)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CFileMappingDlg message handlers

BOOL CFileMappingDlg::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
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

void CFileMappingDlg::OnSend() 
{
	HANDLE hMapObject;
	LPVOID pMapMem;
	CString	strName;
	UINT	nID;
	nID=2002;
	strName="BUAA(Beijing University of Aeronautics and Astronautics)";

	hMapObject=::CreateFileMapping((HANDLE)-1,NULL,
		PAGE_READWRITE,0,(DWORD)(256*sizeof(char)),"FileMapping test");
	if(!hMapObject)
	{
		AfxMessageBox("can't create sharing memory file!");
	}
	pMapMem=(LPLONG)::MapViewOfFile(hMapObject,FILE_MAP_WRITE,
		0,0,0);
	if(!pMapMem)
	{
		AfxMessageBox("can't map sharing memory file!");
		
	}
	memset(pMapMem,0x00,255);


	((char *)pMapMem)[0]=nID;
	UINT nNameLen=strName.GetLength();
	memcpy((char *)pMapMem+1,strName,nNameLen);
	((char *)pMapMem)[nNameLen+1]=0x00;
	((char *)pMapMem)[255]=nNameLen;

	//if(hMapObject!=NULL)
	//	::CloseHandle(hMapObject);
	// TODO: Add your control notification handler code here
	
}

void CFileMappingDlg::OnReceive() 
{
	HANDLE hMapObject;
	LPVOID pMapMem;
	UINT	nID;
	CString	strName;
	nID=0;
	strName="";
	
	hMapObject=::OpenFileMapping(FILE_MAP_READ,TRUE,"FileMapping test");
	if(!hMapObject)
	{
		AfxMessageBox("can't open sharing memory file!");
	}
	pMapMem=(LPLONG)::MapViewOfFile(hMapObject,FILE_MAP_READ,
		0,0,0);
	if(!pMapMem)
	{
		AfxMessageBox("can't map sharing memory file!");
	}
	

	nID=((char*)pMapMem)[0];
	UINT nNameLen=(BYTE)((char *)pMapMem)[255];
	char strTemp[255];
	memcpy(strTemp,(char *)pMapMem+1,nNameLen+1);
	strName=strTemp;
	AfxMessageBox("发送的文字是"+strName);
	//UpdateData(FALSE);
	
	if(hMapObject!=NULL)
		::CloseHandle(hMapObject);
	// TODO: Add your control notification handler code here
	
}