c++ 對 EXCEL 讀寫的封裝

ExcelOp.h

#pragma once

//http://b217dgy.blog.51cto.com/5704306/1215234
//http://www.blogjava.net/jinheking/archive/2005/07/19/5150.html 合併單元格
//http://blog.csdn.net/qinghezhen/article/details/9906023
//http://blog.csdn.net/gyssoft/article/details/1592104
//http://read.pudn.com/downloads100/doc/fileformat/411493/C++/ComTypeLibfor7/comexcel/excel10/comexcel.cpp__.htm
//http://www.cnblogs.com/fullsail/archive/2012/12/28/2837952.html 使用OLE高速讀寫EXCEL的源碼
//http://blog.csdn.net/handsing/article/details/5461070
//http://www.cnblogs.com/xianyunhe/archive/2011/09/13/2174703.html
//http://www.update8.com/Program/C++/27229.html
//http://bbs.csdn.net/topics/390091827 
#include "stdafx.h"  

//OLE的頭文件
#include "CRange.h"
#include "CWorkbook.h"
#include "CWorkbooks.h"
#include "CWorksheet.h"
#include "CWorksheets.h"
#include "CApplication.h"

class CExcelOp
{
public:
	CExcelOp(void);
	~CExcelOp(void);


public:
	void ShowInExcel(BOOL bShow);

	///檢查一個CELL是否是字符串
	//BOOL    IsCellString(long iRow, long iColumn);
	///檢查一個CELL是否是數值
	//BOOL    IsCellInt(long iRow, long iColumn);

	void SetCell(long irow, long icolumn,CString new_string);
	///得到一個CELL的String
	CString GetCell(long iRow, long iColumn);
	CString GetCellByName(CString rowName,CString colName);

	///得到整數
	//int     GetCellInt(long iRow, long iColumn);
	///得到double的數據
	//double  GetCellDouble(long iRow, long iColumn);

	///取得行的總數
	int GetRowCount();
	///取得列的總數
	int GetColumnCount();

	///使用某個shet，shit，shit
	BOOL LoadSheet(long table_index,BOOL pre_load = FALSE);
	///通過名稱使用某個sheet，
	BOOL LoadSheet(const TCHAR* sheet,BOOL pre_load = FALSE);
	///通過序號取得某個Sheet的名稱
	CString GetSheetName(long table_index);

	///得到Sheet的總數
	int GetSheetCount();

	///打開文件
	BOOL OpenExcelFile(const TCHAR * file_name);
	///關閉打開的Excel 文件，有時候打開EXCEL文件就要
	void CloseExcelFile(BOOL if_save = FALSE);
	//另存爲一個EXCEL文件
	void SaveasXSLFile(const CString &xls_file);
	///取得打開文件的名稱
	CString GetOpenFileName();
	///取得打開sheet的名稱
	CString GetLoadSheetName();

	///寫入一個CELL一個int
	//void SetCellInt(long irow, long icolumn,int new_int);
	///寫入一個CELL一個string
	//void SetCellString(long irow, long icolumn,CString new_string);

public:
	///初始化EXCEL OLE
	static BOOL InitExcel();
	///釋放EXCEL的 OLE
	static void ReleaseExcel();
	///取得列的名稱，比如27->AA
	static char *GetColumnName(long iColumn);

protected:

	//預先加載
	void PreLoadSheet(); 

public:
	///打開的EXCEL文件名稱
	CString       open_excel_file_;

	CWorkbooks    m_Books;
	CWorkbook     m_Book;
	CWorksheets   m_sheets;
	CWorksheet    m_sheet;
	CRange        m_Rge;

 	static CApplication m_app;

	///是否已經預加載了某個sheet的數據
	BOOL          already_preload_;

	///Create the SAFEARRAY from the VARIANT ret.
	COleSafeArray ole_safe_array_;
 

	LPDISPATCH m_lpDisp;  
 
};

ExcelOp.cpp

#include "StdAfx.h"
#include "ExcelOp.h"


#ifdef _DEBUG
#define new DEBUG_NEW
#endif



CExcelOp::CExcelOp(void):already_preload_(FALSE)
{

}

CExcelOp::~CExcelOp(void)
{
 
}

COleVariant
covTrue((short)TRUE),
covFalse((short)FALSE),
covOptional((long)DISP_E_PARAMNOTFOUND, VT_ERROR);
 
CApplication CExcelOp::m_app;

//初始化EXCEL文件，
BOOL CExcelOp::InitExcel()
{ 
	BOOL bRtn =FALSE ;
	TCHAR* ptchsExcel[]={
		_T("Excel.Application") //創建Excel 2000服務器(啓動Excel) 
		,_T("Excel.Application.8")//Excel 97
		,_T("Excel.Application.9")//Excel 2000
		,_T("Excel.Application.10")//Excel xp
		,_T("Excel.Application.11")//Excel 2003
		,_T("Excel.Application.12")//Excel 2007
		,_T("Excel.Application.14")//Excel 2010
	};

	CLSID clsid;
	HRESULT hr = S_FALSE;
	for (int i= sizeof(ptchsExcel)/sizeof(*ptchsExcel)-1;i>=0;i--)
	{
#if 0
		
		if (m_app.CreateDispatch(ptchsExcel[i],NULL)) 
		{
			break;
		}
		等同於下面的操作
#else
		hr = CLSIDFromProgID(ptchsExcel[i], &clsid);
		if(SUCCEEDED(hr))
		{ 
			hr = CoCreateInstance(clsid, NULL, CLSCTX_LOCAL_SERVER, IID_IDispatch, (void **)&m_app);
			if(SUCCEEDED(hr)) 
			{
				bRtn = TRUE;
			}
			break;
		} 
#endif
	}

	if (!bRtn)
	{
		AfxMessageBox(_T("創建Excel服務失敗,你可能沒有安裝EXCEL，請檢查!")); 
		return bRtn;
	}

	m_app.put_DisplayAlerts(FALSE); 
	return bRtn;
}

//
void CExcelOp::ReleaseExcel()
{ 
	m_app.Quit();
	m_app.ReleaseDispatch();
	m_app=NULL;
}


//關閉打開的Excel 文件,默認情況不保存文件
void CExcelOp::CloseExcelFile(BOOL if_save)
{
	//如果已經打開，關閉文件
	if (open_excel_file_.IsEmpty() == FALSE)
	{
		//如果保存,交給用戶控制,讓用戶自己存，如果自己SAVE，會出現莫名的等待
		if (if_save)
		{
			ShowInExcel(TRUE);
		}
		else
		{
			m_Book.Close(COleVariant(short(FALSE)),COleVariant(open_excel_file_),covOptional);
			m_Books.Close();
		}

		//打開文件的名稱清空
		open_excel_file_.Empty();
	}

	m_sheets.ReleaseDispatch();
	m_sheet.ReleaseDispatch();
	m_Rge.ReleaseDispatch();
	m_Book.ReleaseDispatch();
	m_Books.ReleaseDispatch();
}

//打開excel文件
BOOL CExcelOp::OpenExcelFile(const TCHAR *file_name)
{
	//先關閉
	CloseExcelFile();

	//m_Books.AttachDispatch(m_app.get_Workbooks(),1);  
	//COleVariant varPath(file_name);  
	//m_Book.AttachDispatch(m_Books.Add(varPath));  

	//利用模板文件建立新文檔 
	m_Books.AttachDispatch(m_app.get_Workbooks(),true); 

	//LPDISPATCH lpDis = NULL;
	m_lpDisp = m_Books.Add(COleVariant(file_name)); 
	if (m_lpDisp)
	{
		m_Book.AttachDispatch(m_lpDisp); 
		//得到Worksheets 
		m_sheets.AttachDispatch(m_Book.get_Worksheets(),true); 

		//記錄打開的文件名稱
		open_excel_file_ = file_name;

		return TRUE;
	}

	return TRUE;
}



//
void CExcelOp::ShowInExcel(BOOL bShow)
{
	m_app.put_Visible(bShow);
	m_app.put_UserControl(bShow);
}

void CExcelOp::SaveasXSLFile(const CString &xls_file)
{
	m_Book.SaveAs(COleVariant(xls_file),
		covOptional,
		covOptional,
		covOptional,
		covOptional,
		covOptional,
		0,
		covOptional,
		covOptional,
		covOptional,
		covOptional,
		covOptional);
	return;
}


int CExcelOp::GetSheetCount()
{
	return m_sheets.get_Count();
}


CString CExcelOp::GetSheetName(long table_index)
{
	CWorksheet sheet;
	sheet.AttachDispatch(m_sheets.get_Item(COleVariant((long)table_index)),true);
	CString name = sheet.get_Name();
	sheet.ReleaseDispatch();
	return name;
}

//按照序號加載Sheet表格,可以提前加載所有的表格內部數據
BOOL CExcelOp::LoadSheet(long table_index,BOOL pre_load)
{
	LPDISPATCH lpDis = NULL;
	m_Rge.ReleaseDispatch();
	m_sheet.ReleaseDispatch();
	lpDis = m_sheets.get_Item(COleVariant((long)table_index));
	if (lpDis)
	{
		m_sheet.AttachDispatch(lpDis,true);
		m_Rge.AttachDispatch(m_sheet.get_Cells(), true);
	}
	else
	{
		return FALSE;
	}

	already_preload_ = FALSE;
	//如果進行預先加載
	if (pre_load)
	{
		PreLoadSheet();
		already_preload_ = TRUE;
	}

	return TRUE;
}


//按照名稱加載Sheet表格,可以提前加載所有的表格內部數據
BOOL CExcelOp::LoadSheet(const TCHAR* sheet,BOOL pre_load)
{
	LPDISPATCH lpDis = NULL;
	m_Rge.ReleaseDispatch();
	m_sheet.ReleaseDispatch();
	lpDis = m_sheets.get_Item(COleVariant(sheet));
	if (lpDis)
	{
		m_sheet.AttachDispatch(lpDis,true);
		m_Rge.AttachDispatch(m_sheet.get_Cells(), true);

	}
	else
	{
		return FALSE;
	}
	//
	already_preload_ = FALSE;
	//如果進行預先加載
	if (pre_load)
	{
		already_preload_ = TRUE;
		PreLoadSheet();
	}

	return TRUE;
}



//得到列的總數
int CExcelOp::GetColumnCount()
{
	CRange range;
	CRange usedRange;
	usedRange.AttachDispatch(m_sheet.get_UsedRange(), true);
	range.AttachDispatch(usedRange.get_Columns(), true);
	int count = range.get_Count();
	usedRange.ReleaseDispatch();
	range.ReleaseDispatch();
	return count;
}

//得到行的總數
int CExcelOp::GetRowCount()
{
	CRange range;
	CRange usedRange;
	usedRange.AttachDispatch(m_sheet.get_UsedRange(), true);
	range.AttachDispatch(usedRange.get_Rows(), true);
	int count = range.get_Count();
	usedRange.ReleaseDispatch();
	range.ReleaseDispatch();
	return count;
}

//返回打開的EXCEL文件名稱
CString CExcelOp::GetOpenFileName()
{
	return open_excel_file_;
}

//取得打開sheet的名稱
CString CExcelOp::GetLoadSheetName()
{
	return m_sheet.get_Name();
}


//取得列的名稱，比如27->AA
char *CExcelOp::GetColumnName(long icolumn)
{   
	static char column_name[64];
	size_t str_len = 0;

	while(icolumn > 0)
	{
		int num_data = icolumn % 26;
		icolumn /= 26;
		if (num_data == 0)
		{
			num_data = 26;
			icolumn--;
		}
		column_name[str_len] = (char)((num_data-1) + 'A' );
		str_len ++;
	}
	column_name[str_len] = '\0';
	//反轉
	_strrev(column_name);

	return column_name;
}

//預先加載
void CExcelOp::PreLoadSheet()
{
	CRange used_range;
	used_range = m_sheet.get_UsedRange();    

	VARIANT ret_ary = used_range.get_Value2();
	if (!(ret_ary.vt & VT_ARRAY))
	{
		return;
	}
	ole_safe_array_.Clear();
	ole_safe_array_.Attach(ret_ary); 
}

void CExcelOp::SetCell(long irow, long icolumn,CString new_string)
{
	COleVariant new_value(new_string);
	CRange start_range = m_sheet.get_Range(COleVariant(_T("A1")),covOptional);
	CRange write_range = start_range.get_Offset(COleVariant((long)irow -1),COleVariant((long)icolumn -1) );
	write_range.put_Value2(new_value);
	start_range.ReleaseDispatch();
	write_range.ReleaseDispatch();
}

CString CExcelOp::GetCell(long iRow, long iColumn)  
{  
	COleVariant vResult ; 
	//字符串
	if (already_preload_ == FALSE)
	{
		m_Rge.AttachDispatch(m_Rge.get_Item (COleVariant((long)iRow),COleVariant((long)iColumn)).pdispVal, true);
		vResult =m_Rge.get_Value2();
	}
	//如果數據依據預先加載了
	else
	{
		long read_address[2];
		VARIANT val;
		read_address[0] = iRow;
		read_address[1] = iColumn;
		ole_safe_array_.GetElement(read_address, &val);
		vResult = val;
	}

	CString str;
	if(vResult.vt == VT_BSTR)       //字符串
	{
		str=vResult.bstrVal;
	}
	else if (vResult.vt==VT_INT)
	{
		str.Format(_T("%d"),vResult.pintVal);
	}
	else if (vResult.vt==VT_R8)     //8字節的數字
	{
		str.Format(_T("%0.0f"),vResult.dblVal);
	}
	else if(vResult.vt==VT_DATE)    //時間格式
	{
		SYSTEMTIME st;
		VariantTimeToSystemTime(vResult.date, &st);
		CTime tm(st);
		str=tm.Format(_T("%Y-%m-%d"));

	}
	else if(vResult.vt==VT_EMPTY)   //單元格空的
	{
		str=_T("");
	} 

	m_Rge.ReleaseDispatch();

	return str;
} 

CString CExcelOp::GetCellByName(CString rowName,CString colName)  
{  
	COleVariant value;  
	CString strValue;  
	long row=0,col=0;  
	long re_row=0,re_col=0;

	m_Rge.AttachDispatch(m_sheet.get_Cells(),TRUE);  
	for (row=1,col=1;col<m_Rge.get_Column();col++)  
	{  
		value=m_Rge.get_Item(_variant_t(row),_variant_t(col));                  //返回的類型是VT_DISPATCH 這是一個指針  
		m_Rge.AttachDispatch(value.pdispVal,TRUE);  
		VARIANT value2=m_Rge.get_Text();  
		CString strValue=value2.bstrVal;  
		if (strValue==colName)  
			break;  
	}  
	re_col=col;  
	for (row=1,row=1;row<m_Rge.get_Row();row++)  
	{  
		value=m_Rge.get_Item(_variant_t(row),_variant_t(col));                  //返回的類型是VT_DISPATCH 這是一個指針  
		m_Rge.AttachDispatch(value.pdispVal,TRUE);  
		VARIANT value2=m_Rge.get_Text();  
		CString strValue=value2.bstrVal;  
		if (strValue==rowName)        
			break;  
	}  
	re_row=row;  
	return GetCell(re_row,re_col);  
}

用例 :

    m_excel = new CExcelOp();
    CExcelOp::InitExcel();
    nsYLX::CUtil::GetModulePath(IN OUT m_ptchCurrPath,IN MAX_PATH);

    TCHAR tchsExcelPath[MAX_PATH];
    //獲得上一級目錄
    nsYLX::CUtil::GetParentPath(IN m_ptchCurrPath, OUT tchsExcelPath, IN MAX_PATH, 1);

    TCHAR tchs[MAX_PATH];
    nsYLX::CUtil::GenericAbsFullPath(IN tchsExcelPath,IN  _T("files/2013淘寶雙11活動商品內部清單(史上陣容強大15萬商品價格提前曝光).xlsx"),OUT tchs, MAX_PATH);
 

    if (PathFileExists(tchs))
    {
        //打開c:\\1.xls
        m_excel->OpenExcelFile(tchs); 
        //m_excel->ShowInExcel(TRUE);
    }


     if (!m_excel->LoadSheet(_T("服飾"),1))
     {
         return;
     }
    
    // TODO: 在此加入額外的初始設定
    COleVariant covOptional((long)DISP_E_PARAMNOTFOUND, VT_ERROR);

    //新建一個.xls文件，並寫入數據
    CWorkbooks books;
    books.AttachDispatch(CExcelOp::m_app.get_Workbooks());
 
    CWorkbook book;
    book=books.Add(covOptional);//得到Workbook

    CWorksheets   sheets;
    CWorksheet   sheet;
    CRange       usedRange;

    sheets=book.get_Worksheets();
    sheet=sheets.get_Item(COleVariant((short)1));
  
    CRange start_range = sheet.get_Range(COleVariant(_T("A1")),covOptional);
    start_range.put_Value2(COleVariant(_T("hanhan")));

    int nRows = m_excel->GetRowCount();
    int nCells  = m_excel->GetColumnCount();
    CString sCloth,sVal;
    int n=0;
    for (int i=1;i<nRows;i++)
    {
        sCloth = m_excel->GetCell(i,1);
        if (sCloth == _T("男裝"))
        {
            sVal = m_excel->GetCell(i,2);

            CRange write_range = start_range.get_Offset(COleVariant((long)n),COleVariant((long)0)) ;
            write_range.put_Value2((COleVariant)(_T("男裝")));
            write_range.ReleaseDispatch();

            write_range = start_range.get_Offset(COleVariant((long)n++),COleVariant((long)1)) ;
            write_range.put_Value2((COleVariant)(sVal));
            write_range.ReleaseDispatch();
        }
    }//for

    start_range.ReleaseDispatch(); 

    book.SaveAs(COleVariant(_T("C:\\2.xlsx")),covOptional,covOptional,
            covOptional,covOptional,covOptional,0,
            covOptional,covOptional,covOptional,covOptional,covOptional);  

        book.put_Saved(TRUE); //將Workbook的保存狀態設置爲已保存，即不讓系統提示是否人工保存

        book.Close(covOptional,covOptional,covOptional);//關閉workbook對象

        books.Close(); 

        sheet.ReleaseDispatch();//釋放sheet對象

        sheets.ReleaseDispatch(); //釋放sheets對象

        book.ReleaseDispatch();//釋放workbook對象

        books.ReleaseDispatch(); //釋放workbooks對象

網上能直接拿來用的代碼不多. 這部分代碼取自網絡各個地方,我都一一註明.

整個工程下載: ExcelDemo2

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