MFC中使用excel2007读写excel表格
环境:vs2015,excel2007,win7 64位
第一步:建立MFC工程,导入Application Range Workbook Worksheet Workbooks Worksheets
//最终要包含的excel服务的头文件#include "CApplication.h" #include "CRange.h" #include "CWorkbook.h" #include "CWorksheet.h" #include "CWorkbooks.h" #include "CWorksheets.h" 1234567
第二步:建立excel服务初始化、资源关闭、excel保存的基类
//ExcelFileOp.h#pragma once#include "CApplication.h" #include "CRange.h" #include "CWorkbook.h" #include "CWorksheet.h" #include "CWorkbooks.h" #include "CWorksheets.h" #include <string> #include <utility>#include <vector>#include <map>using namespace std;// 进价、售价struct _StrSaleInfo { CString strStockPrice; CString strSalePrice; };// 货物信息typedef map<CString, _StrSaleInfo> _st_cargo_info_;class CMyExcel {private: //标记Excel对象的变量 static CApplication *m_papp; // excel app 指针,多个使用,但只初始化一次 static int m_siInference; // app 的引用计数,初始化一次+1,只有为0时才真正初始化,其他时候只做+1操作。析构自动-1,如果为0则释放m_papp CWorkbooks m_books; // books long m_rowCount; //标记Excel当前写入的列数 long m_sheetCount; //标记Excel使用了多少标签页的变量 long m_totalRow; //标记Excel总列数的变量 long m_totalCol; //标记Excel总行数的变量 char *m_colPst; //一个含有A-Z的数组 pair<long, long> m_cellPosition; //cell的行和列protected: COleVariant m_covTrue, m_covFalse, m_coverOptional, m_filePath; enum _EN_VISIBLE_ { eUN_VISIBLE = 0, // 可见 eVISIBLE, // 不可见 }; COleVariant covOptional; // 初始化books、打开book的时候需要用到 CApplication * fnGetApp() { return m_papp; }public: CMyExcel(); virtual ~CMyExcel(); };
// ExcelFileOp.cpp#include "stdafx.h"#include "ExcelFileOp.h"#include"stdafx.h" // 初始化静态成员CApplication * CMyExcel::m_papp = NULL;int CMyExcel::m_siInference = 0; CMyExcel::CMyExcel() :m_rowCount(1), m_sheetCount(1), m_totalCol(256), m_totalRow(65536),covOptional((long)DISP_E_PARAMNOTFOUND, VT_ERROR) { // 获取系统的excel句柄 if (NULL == m_papp) { m_papp = new CApplication; if (!m_papp->CreateDispatch(TEXT("Excel.Application"))) { AfxMessageBox(_T("Could not start Excel and get Application object !")); return; } } m_siInference++; m_covTrue = COleVariant((short)TRUE); m_covFalse = COleVariant((short)FALSE); m_coverOptional = COleVariant((long)DISP_E_PARAMNOTFOUND, VT_ERROR); m_books = m_papp->get_Workbooks(); m_papp->put_Visible(FALSE); // 初始化excel为不可见 m_papp->put_UserControl(FALSE); // 初始化控件为不可见}// 释放资源CMyExcel::~CMyExcel() { if (0 == --m_siInference) { m_books.Close(); m_books.ReleaseDispatch(); m_papp->Quit(); m_papp->ReleaseDispatch(); delete m_papp; m_papp = NULL; } }
第三步:创建实际的读写excel的类,继承于CMyExcel
// ExcelBookReadWrite.h#pragma once#include "ExcelFileOp.h"class CExcelBookReadWrite : public CMyExcel {public: CExcelBookReadWrite(const CString &csFilePath,const bool bVisible = false); ~CExcelBookReadWrite();private: _EN_VISIBLE_ m_eVisible; CWorkbooks m_books; CWorkbook m_book; CWorksheets m_sheets; //标记excel中当前写入的标签页 CWorksheet m_sheet; CRange m_range; //标记写入的范围 CApplication *m_pAppInstance;public: // 获取excel的行数 virtual long fnGetLineCount(); // 获取excel的列数 virtual long fnGetCloCount(); // 设置指定cell的值 virtual void fnSetCell(const pair<long, long> &pos, const CString &csNews); // 获取指定cell的值 virtual CString fnGetCell(const pair<long, long> &pos); // 获取当前cell的坐标(行、列) virtual pair<long, long> fnGetCellPosition(); // 根据cell文字的长度,设置列的长度。如果pos为-1,-1则根据当前cell的内容来设置。设置长度时,先获取当前cell的长度,如果需要设置的长度较长则更新 virtual void fnSetLineLength(const pair<long, long> &pos = make_pair(-1, -1)); // 保存excel virtual void fnSaveBook(); };
// ExcelBookReadWrite.cpp#include "stdafx.h"#include "ExcelBookReadWrite.h"// 打开指定路径的excelCExcelBookReadWrite::CExcelBookReadWrite(const CString &csFilePath, const bool bVisible) { m_pAppInstance = fnGetApp(); if (NULL == m_pAppInstance) { return; } m_books = m_pAppInstance->get_Workbooks(); m_book = m_books.Open(csFilePath, covOptional, covOptional, covOptional, covOptional, covOptional, covOptional, covOptional, covOptional, covOptional, covOptional, covOptional, covOptional, covOptional, covOptional); m_sheets = m_book.get_Sheets(); m_sheet = m_sheets.get_Item(COleVariant((short)1)); m_range = m_sheet.get_UsedRange(); CRange cols = m_range.get_EntireColumn(); cols.AutoFit(); m_eVisible = eVISIBLE; if (bVisible) { m_eVisible = eUN_VISIBLE; } m_pAppInstance->put_Visible(bVisible); m_pAppInstance->put_Visible(TRUE); }// 关闭打开的bookCExcelBookReadWrite::~CExcelBookReadWrite() { // 如果此处不save,则会造成退出时,有残留的 excel.exe 进程 m_book.put_Saved(TRUE); //m_book.Close(); m_book.ReleaseDispatch(); }// 获取excel当前sheet的行数(横向)long CExcelBookReadWrite::fnGetLineCount() { //_Worksheet ws; //Range range; //range = ws.GetUsedRange();//获得Worksheet已使用的范围 //range = range.GetRows(); //获得总行数(LPDISPATCH类型) //long UsedRows = range.GetCount(); //即可获得已使用的行数了。 //获得列数也是一样的方法,把GetRows()改为GetColumns即可。 //CRange range = m_sheet.get_UsedRange(); CRange rows = m_range.get_Rows(); return rows.get_Count(); }// // 获取excel当前sheet的列数(纵向)long CExcelBookReadWrite::fnGetCloCount() { //CRange range = m_sheet.get_UsedRange(); CRange cols = m_range.get_Columns(); return cols.get_Count(); }void CExcelBookReadWrite::fnSetCell(const pair<long, long> &pos,CONST CString &csNews) { m_range.AttachDispatch(m_sheet.get_Cells(),TRUE); m_range.put_Item(_variant_t(pos.first), _variant_t(pos.second), _variant_t(csNews)); } CString CExcelBookReadWrite::fnGetCell(const pair<long, long> &pos) { m_range.AttachDispatch(m_sheet.get_Cells(), TRUE); return m_range.get_Item(_variant_t(pos.first), _variant_t(pos.second)); } pair<long, long> CExcelBookReadWrite::fnGetCellPosition() { m_range.AttachDispatch(m_sheet.get_Cells(), TRUE); return make_pair(m_range.get_Column(), m_range.get_Row()); }void CExcelBookReadWrite::fnSetLineLength(const pair<long, long> &pos) { CRange cell = m_range.get_Item(COleVariant(long(pos.first)), COleVariant(long(pos.second))).pdispVal; CString cs = fnGetCell(pos); double dwidth = cs.GetLength()*0.7; // 将 _variant_t 转换为 long _variant_t val = cell.get_ColumnWidth(); val.ChangeType(VT_R8); double dCurrentWidth = val.dblVal; // 如果目标长度比当前长度长,则改变长度 if (dwidth > dCurrentWidth) { cell.put_ColumnWidth(_variant_t(dwidth)); } }void CExcelBookReadWrite::fnSaveBook() { //m_book.put_Saved(TRUE); //退出excel.exe必须 // 设置自适应 CRange cols = m_range.get_EntireColumn(); cols.AutoFit(); m_book.Save(); // 保存
第四步:读写excel,略
完整代码可在链接中下载,一个简单的excel读写MFC应用。
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