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Visual C++

DrvSpaceDlg.cpp：源码内容
							// DrvSpaceDlg.cpp : implementation file
//
#include "stdafx.h"
#include "DrvSpace.h"
#include "DrvSpaceDlg.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()
/////////////////////////////////////////////////////////////////////////////
// CDrvSpaceDlg dialog
CDrvSpaceDlg::CDrvSpaceDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CDrvSpaceDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CDrvSpaceDlg)
		// 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 CDrvSpaceDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDrvSpaceDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CDrvSpaceDlg, CDialog)
	//{{AFX_MSG_MAP(CDrvSpaceDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_GETDRVSPACEINFO, OnGetDrvSpaceInfo)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CDrvSpaceDlg message handlers
BOOL CDrvSpaceDlg::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
	//列出所有驱动器
	FindAllDrivers();
	CComboBox* Driver=(CComboBox*)GetDlgItem(IDC_DRIVER);
	Driver->SetCurSel(0);
	return TRUE;  // return TRUE  unless you set the focus to a control
}
void CDrvSpaceDlg::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 CDrvSpaceDlg::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 CDrvSpaceDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}
void CDrvSpaceDlg::OnGetDrvSpaceInfo() 
{
	//更新列表框
	UpdateData(TRUE);
	//获得选择的驱动器
	CString Driver;
	CComboBox* pDriver = (CComboBox*)GetDlgItem(IDC_DRIVER);
	pDriver->GetWindowText(Driver);
	//获得磁盘空间信息
	ULARGE_INTEGER FreeAv,TotalBytes,FreeBytes;
	if(GetDiskFreeSpaceEx(Driver,&FreeAv,&TotalBytes,&FreeBytes))
	{
		//格式化信息，并显示出来
		CString strTotalBytes,strFreeBytes;
		strTotalBytes.Format("%u字节",TotalBytes.QuadPart);
		strFreeBytes.Format("%u字节",FreeBytes.QuadPart);
		CStatic* pTotalStatic = (CStatic*)GetDlgItem(IDC_TOTAL);
		CStatic* pFreeStatic = (CStatic*)GetDlgItem(IDC_FREE);
		pTotalStatic->SetWindowText(strTotalBytes);
		pFreeStatic->SetWindowText(strFreeBytes);
	}
}
void CDrvSpaceDlg::FindAllDrivers()
{
	CComboBox* Driver=(CComboBox*)GetDlgItem(IDC_DRIVER);
	DWORD dwNumBytesForDriveStrings;//实际存储驱动器号的字符串长度
	HANDLE hHeap;
	LPSTR lp;
	CString strLogdrive;
	//获得实际存储驱动器号的字符串长度
	dwNumBytesForDriveStrings=GetLogicalDriveStrings(0,NULL)*sizeof(TCHAR);
	//如果字符串不为空，则表示有正常的驱动器存在
	if (dwNumBytesForDriveStrings!=0) {
		//分配字符串空间
		hHeap=GetProcessHeap();
		lp=(LPSTR)HeapAlloc(hHeap,HEAP_ZERO_MEMORY,
			dwNumBytesForDriveStrings);
		//获得标明所有驱动器的字符串
		GetLogicalDriveStrings(HeapSize(hHeap,0,lp),lp);
		//将驱动器一个个放到下拉框中
		while (*lp!=0) {
			Driver->AddString(lp);
			lp=_tcschr(lp,0)+1;
		}
	}
	else 
		AfxMessageBox("Can't Use The Function GetLogicalDriveStrings!");
}

						