www.gusucode.com > VC++读写Excel文件源代码源码程序 > VC++读写Excel文件源代码源码程序\code\OdbcExcel\OdbcExcelDlg.cpp

    // OdbcExcelDlg.cpp : implementation file
// Download by http://www.NewXing.com

#include "stdafx.h"
#include "OdbcExcel.h"
#include "OdbcExcelDlg.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()

/////////////////////////////////////////////////////////////////////////////
// COdbcExcelDlg dialog

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

BEGIN_MESSAGE_MAP(COdbcExcelDlg, CDialog)
	//{{AFX_MSG_MAP(COdbcExcelDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_WRITEEXCEL, OnWriteexcel)
	ON_BN_CLICKED(IDC_READEXCEL, OnReadexcel)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// COdbcExcelDlg message handlers

BOOL COdbcExcelDlg::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 COdbcExcelDlg::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 COdbcExcelDlg::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 COdbcExcelDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

//创建并写入Excel文件
void COdbcExcelDlg::WriteToExcel()
{
	CDatabase database;
	CString sDriver = "MICROSOFT EXCEL DRIVER (*.XLS)"; // Excel安装驱动
	CString sExcelFile = "c:\\demo.xls";// 要建立的Excel文件
	CString sSql;
	
	TRY
	{
		// 创建进行存取的字符串
		sSql.Format("DRIVER={%s};DSN='';FIRSTROWHASNAMES=1;READONLY=FALSE;CREATE_DB=\"%s\";DBQ=%s",
			sDriver,sExcelFile,sExcelFile);
		
		// 创建数据库 (既Excel表格文件)
		if( database.OpenEx(sSql,CDatabase::noOdbcDialog) )
		{
			// 创建表结构(姓名、年龄)			
			sSql = "CREATE TABLE demo (Name TEXT,Age NUMBER)";
			database.ExecuteSQL(sSql);
			
			// 插入数值
			sSql = "INSERT INTO demo (Name,Age) VALUES ('张宏林',25)";
			database.ExecuteSQL(sSql);
			sSql = "INSERT INTO demo (Name,Age) VALUES ('肖洪伟',24)";
			database.ExecuteSQL(sSql);
			sSql = "INSERT INTO demo (Name,Age) VALUES ('蒋渝',34)";
			database.ExecuteSQL(sSql);
		}
		// 关闭数据库
		database.Close();
	}
	CATCH_ALL(e)
	{
		TRACE1("Excel驱动没有安装: %s",sDriver);
	}
	END_CATCH_ALL;
}

// 读取Excel文件
void COdbcExcelDlg::ReadFromExcel()
{
	CDatabase database;
	CString sSql;
	CString sItem1, sItem2;
	CString sDriver;
	CString sDsn;
	CString sFile = "C:\\Demo.xls";// 将被读取的Excel文件名
	
	// 检索是否安装有Excel驱动 "Microsoft Excel Driver (*.xls)"
	sDriver = GetExcelDriver();
	if (sDriver.IsEmpty())
	{
		// 没有发现Excel驱动
		AfxMessageBox("没有安装Excel驱动!");
		return;
	}
	// 创建进行存取的字符串
	sDsn.Format("ODBC;DRIVER={%s};DSN='';DBQ=%s",
		sDriver,sFile);
	TRY
	{
		// 打开数据库(既Excel文件)
		database.Open(NULL, false, false, sDsn);
		CRecordset recset(&database);
		// 设置读取的查询语句
		sSql = "SELECT Name, Age FROM demo ORDER BY Name";
		
		//执行查询语句
		recset.Open(CRecordset::forwardOnly, sSql, CRecordset::readOnly);
		
		// 获取查询结果
		while (!recset.IsEOF())
		{
			//读取Excel内部数值
			recset.GetFieldValue("Name", sItem1);
			recset.GetFieldValue("Age", sItem2);
			
			CString strMsg;
			strMsg.Format("Name:%s,Age:%s",sItem1,sItem2);
			AfxMessageBox(strMsg);
			// 移到下一行
			recset.MoveNext();
		}
		// 关闭数据库
		database.Close();
	}
	CATCH(CDBException, e)
	{
		// 数据库操作产生异常时...
		AfxMessageBox("数据库错误: " + e->m_strError);
	}
	END_CATCH;
}


// 获取ODBC中Excel驱动
CString COdbcExcelDlg::GetExcelDriver()
{
	char szBuf[2001];
	WORD cbBufMax = 2000;
	WORD cbBufOut;
	char *pszBuf = szBuf;
	CString sDriver;
	// 获取已安装驱动的名称(涵数在odbcinst.h里)
	if (!SQLGetInstalledDrivers(szBuf, cbBufMax, &cbBufOut))
		return "";
	// 检索已安装的驱动是否有Excel...
	do
	{
		if (strstr(pszBuf, "Excel") != 0)
		{
			//发现 !
			sDriver = CString(pszBuf);
			break;
		}
		pszBuf = strchr(pszBuf, '\0') + 1;
	}
	while (pszBuf[1] != '\0');
	return sDriver;
}

void COdbcExcelDlg::OnWriteexcel() 
{
	WriteToExcel();	
}

void COdbcExcelDlg::OnReadexcel() 
{
	ReadFromExcel();
}