#include " to the "StdAfx.h" file; then create the excel file through ODBC; then read the Excel file directly through ODBC That’s it."> How to read excel in c++-C#.Net Tutorial-php.cn

How to read excel in c++

藏色散人
Release: 2020-02-19 09:30:00
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How to read excel in c++

c++如何读取excel?C++ ODBC操作excel全过程

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想要通过ODBC直接读、写Excel表格文件,首先,应确保ODBC中已安装有Excel表格文件的驱动"MICROSOFT EXCEL DRIVER (*.XLS)"。然后,可根据下面步骤进行:

1. 在StdAfx.h文件中加入:

#include  #include 
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2. 通过ODBC直接创建Excel文件(暂定文件名:Demo.xls)

//创建并写入Excel文件 void CRWExcel::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 ('徐景周',26)"; database.ExecuteSQL(sSql); sSql = "INSERT INTO demo (Name,Age) VALUES ('徐志慧',22)"; database.ExecuteSQL(sSql); sSql = "INSERT INTO demo (Name,Age) VALUES ('郭徽',27)"; 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; }
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3. 通过ODBC直接读取Excel文件(暂定文件名:Demo.xls)

// 读取Excel文件 void CRWExcel::ReadFromExcel() { CDatabase database; CString sSql; CString sItem1, sItem2; CString sDriver; CString sDsn; CString sFile = "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); // 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 CRWExcel::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; }
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