c++_導入/導出excel文件

方法1：經過數據庫

（1）導出excel

CDatabase database;
CString sDriver		= _T("MICROSOFT EXCEL DRIVER (*.XLS)"); // Excel安裝驅動
CString sExcelFile	=  _T("c:\\系統告警信息導出文件.xls");     // 要創建的Excel文件
if (_waccess(sExcelFile.AllocSysString(),0)!= -1)
	remove(sExcelFile);//刪除
		
TRY
{
	//	建立進行存取的字符串
    CString sSql;
	sSql.Format(_T("DRIVER={%s};DSN='''';FIRSTROWHASNAMES=1;READONLY=FALSE;CREATE_DB=\"%s\";DBQ=%s"),
			sDriver, sExcelFile, sExcelFile);

	// 建立數據庫 (既Excel表格文件)
	if( database.OpenEx(sSql,CDatabase::noOdbcDialog) )
	{
		//	建立表結構(姓名、年齡)
		sSql = _T("CREATE TABLE 表名(編號 TEXT, 字段1TEXT, 字段2TEXT, 字段3TEXT, 字段4TEXT, 字段5TEXT,[字段6] TEXT)");
			database.ExecuteSQL(sSql);
			for( int iCount=0; iCount <m_list.GetItemCount();iCount++)
			{
				CString  strNum,strMsi,strPhoneNum,strType,strResult,strDescribe,strTime;
				strNum		= m_list.GetItemText(iCount, 0);
				strMsi		= m_list.GetItemText(iCount, 1);
				strPhoneNum = m_list.GetItemText(iCount, 2);
				strType		= m_list.GetItemText(iCount, 3);
				strResult	= m_list.GetItemText(iCount, 4);
				strDescribe = m_list.GetItemText(iCount, 5);
				strTime		= m_list.GetItemText(iCount, 6);

				// 插入數值
				sSql.Format(_T("INSERT INTO 表名(編號, 字段1, 字段2, 字段3, 字段4, 字段5,\
								[字段6]) VALUES ('%s','%s','%s', '%s','%s','%s', '%s')"),
					strNum,strMsi,strPhoneNum, strType,strResult,strDescribe, strTime);
				database.ExecuteSQL(sSql);
			}
		}   
		//	關閉數據庫
		database.Close();
	}
	CATCH_ALL(e)
	{
		TRACE1("Excel驅動沒有安裝: %s",sDriver);
		MessageBox(_T( "導出數據失敗!"), _T( "錯誤" ), MB_OK);
	}
	END_CATCH_ALL;

（2）導入excel

CString strFileFilter(_T("XLS File(*.xls)|*.xls|XLSX File(*.xlsx)|*.xlsx||"));
	CFileDialog fileOpen(TRUE, _T("*.xls;*.xlsx"), _T(""), OFN_HIDEREADONLY|OFN_OVERWRITEPROMPT,strFileFilter , NULL);
	if (IDOK != fileOpen.DoModal())
		return ;
	
	CString sExcelFile = fileOpen.GetPathName();

	CString sSql;
	CString sDriver		= _T("MICROSOFT EXCEL DRIVER (*.XLS)");				// Excel安裝驅動
	sSql.Format(_T("DRIVER={%s};DSN='''';FIRSTROWHASNAMES=1;READONLY=FALSE;CREATE_DB=\"%s\";DBQ=%s"),
		sDriver, sExcelFile, sExcelFile);

	CDatabase database;
	CRecordset rs;
	if( !database.OpenEx(sSql,CDatabase::noOdbcDialog) )
		return;

	m_list.DeleteAllItems();

	CRecordset recordset(&database);
	sSql = _T("select * from 白名單 ");
	recordset.Open(CRecordset::forwardOnly, sSql, CRecordset::readOnly);

	CString strPhoneNumber,strVender,strIMSI,strIMEI,strRollCall;	
	int nIndex = 0;
	while( !recordset.IsEOF( ) ) 
	{
		recordset.GetFieldValue(short(0),strPhoneNumber);
		recordset.GetFieldValue(short(1),strVender);
		recordset.GetFieldValue(short(2),strIMSI);
		recordset.GetFieldValue(short(3),strIMEI);
		recordset.GetFieldValue(short(4),strRollCall);
        recordset.MoveNext();
	}

方法2：調用libxl動態庫

#pragma once
#include <vector>
#include <string>

//! 讀取excel中的數據 
struct CLibXlInfo;
class _declspec(dllexport) CExcelReaderLibXl
{
public:
	CExcelReaderLibXl(void);
	virtual ~CExcelReaderLibXl(void);

public:
	bool Open(CString& strXlsFile);
	bool Close();
	bool Save();//保存

public:
	long GetSheetCount();
	long GetRows(long lSheetIndex);
	long GetCols(long lSheetIndex);

	bool ReadRowTexts(long lSheetIndex , long lRow, std::vector<CString>& arrValues);
	//寫入數據
	bool WirteCellText(long lSheetIndex , long lRow, long lCol, CString strValue);

private:
	CLibXlInfo* m_pBookInfo;	
};

#include "StdAfx.h"
#include "ExcelReaderLibXl.h"
#include "libxl-3.7.2.0/libxl.h"

struct CLibXlInfo
{
	CLibXlInfo	()
	: m_pBook(NULL)
	{
	}
	
	libxl::Book* m_pBook;
	CString m_strFileName;
};

CExcelReaderLibXl::CExcelReaderLibXl(void)
: m_pBookInfo(new CLibXlInfo)
{
}

CExcelReaderLibXl::~CExcelReaderLibXl(void)
{
	Close();
	delete m_pBookInfo;
}

bool CExcelReaderLibXl::Open(CString& strXlsFile)
{
	if (!Close())
		return false;

	CString strExt(CComVar(strXlsFile).GetFileExtOnly());
	strExt.MakeUpper();

	m_pBookInfo->m_pBook = NULL;
	if (strExt == _T("XLS"))
		m_pBookInfo->m_pBook = xlCreateBook();
	else if (strExt == _T("XLSX"))
		m_pBookInfo->m_pBook = xlCreateXMLBook();

	if (NULL == m_pBookInfo->m_pBook)
		return false;

	//解鎖
	m_pBookInfo->m_pBook->setKey(_T("Halil Kural"), _T("windows-2723210a07c4e90162b26966a8jcdboe"));

	if (!m_pBookInfo->m_pBook->load(strXlsFile))
	{
		Close();
		return false;
	}
	m_pBookInfo->m_strFileName = strXlsFile;

	return true;
}

//獲取頁數
long CExcelReaderLibXl::GetSheetCount()
{
	if (NULL == m_pBookInfo->m_pBook)
		return -1;

	return m_pBookInfo->m_pBook->sheetCount();
}

long CExcelReaderLibXl::GetRows(long lSheetIndex)
{
	if (NULL == m_pBookInfo->m_pBook)
		return -1;

	if (lSheetIndex < 0 || lSheetIndex >= m_pBookInfo->m_pBook->sheetCount())
		return -1;

	libxl::Sheet* pSheet = m_pBookInfo->m_pBook->getSheet(lSheetIndex);
	if (NULL == pSheet)
		return -1;

	return (pSheet->lastRow() - pSheet->firstRow() + 1);
}

long CExcelReaderLibXl::GetCols(long lSheetIndex)
{
	if (NULL == m_pBookInfo->m_pBook)
		return -1;

	if (lSheetIndex < 0 || lSheetIndex >= m_pBookInfo->m_pBook->sheetCount())
		return -1;

	libxl::Sheet* pSheet = m_pBookInfo->m_pBook->getSheet(lSheetIndex);
	if (NULL == pSheet)
		return -1;

	return (pSheet->lastCol() - pSheet->firstCol() + 1);
}

//讀取一行數據
bool CExcelReaderLibXl::ReadRowTexts(long lSheetIndex , long lRow, std::vector<CString>& arrValues)
{
	arrValues.clear();

	if (NULL == m_pBookInfo->m_pBook)
		return false;

	if (lSheetIndex < 0 || lSheetIndex >= m_pBookInfo->m_pBook->sheetCount())
		return false;

	libxl::Sheet* pSheet = m_pBookInfo->m_pBook->getSheet(lSheetIndex);
	if (NULL == pSheet)
		return false;

	long lRowNum = pSheet->lastRow() - pSheet->firstRow() + 1;
	long lColNum = pSheet->lastCol() - pSheet->firstCol() + 1;
	if (lRowNum < lRow)
		return false;

	CString strValue;
	//行列從0開始 
	for (long lColIndex = 0; lColIndex < lColNum; ++lColIndex)
	{
		strValue.Empty();
		libxl::CellType curCellType = pSheet->cellType(lRow, lColIndex);
		if (curCellType == libxl::CellType::CELLTYPE_NUMBER)
		{
			strValue.Format(_T("%f"), pSheet->readNum(lRow, lColIndex));
			strValue.TrimRight(_T("0"));
			strValue.TrimRight(_T("."));
		}
		else
		{
			strValue = pSheet->readStr(lRow, lColIndex);
		}

		arrValues.push_back(strValue);
	}

	return true;
}

bool CExcelReaderLibXl::Close()
{
	if (NULL == m_pBookInfo->m_pBook)
		return true;

	m_pBookInfo->m_pBook->release();
	m_pBookInfo->m_pBook = NULL;

	return true;
}

bool CExcelReaderLibXl::WirteCellText( long lSheetIndex , long lRow, long lCol, CString strValue )
{
	libxl::Sheet* pSheet = m_pBookInfo->m_pBook->getSheet(0);
	if (NULL == pSheet)
		return false;

	libxl::Font* pFont = m_pBookInfo->m_pBook->addFont();
	if (NULL == pFont)
		return false;
	pFont->setName(_T("宋體"));
	pFont->setSize(10);
	pFont->setColor(libxl::Color::COLOR_BLACK);
	
	libxl::Format* pFormat = m_pBookInfo->m_pBook->addFormat();
	if (NULL == pFormat)
		return false;
	pFormat->setFont(pFont);
	pFormat->setAlignH(libxl::AlignH::ALIGNH_LEFT);	
	pFormat->setPatternForegroundColor(libxl::Color::COLOR_NONE);
	
	if (!pSheet->writeStr(lRow,lCol, strValue,pFormat))
		return false;

	return true;
}

bool CExcelReaderLibXl::Save()
{
	return m_pBookInfo->m_pBook->save(m_pBookInfo->m_strFileName);
}