#include <afxdb.h> 
#include <odbcinst.h>

//創(chuàng)建并寫入Excel文件
void CRWExcel::WriteToExcel()
{
CDatabase database;
CString sDriver = "MICROSOFT EXCEL DRIVER (*.XLS)"; // Excel安裝驅(qū)動
CString sExcelFile = "c:\\demo.xls"; // 要建立的Excel文件
CString sSql;
TRY
{
// 創(chuàng)建進行存取的字符串
sSql.Format("DRIVER={%s};DSN='';FIRSTROWHASNAMES=1;READONLY=FALSE;CREATE_DB=\"%s\";DBQ=%s",sDriver, sExcelFile, sExcelFile);
// 創(chuàng)建數(shù)據(jù)庫 (既Excel表格文件)
if( database.OpenEx(sSql,CDatabase::noOdbcDialog) )
{
// 創(chuàng)建表結(jié)構(gòu)(姓名、年齡)
sSql = "CREATE TABLE demo (Name TEXT,Age NUMBER)";
database.ExecuteSQL(sSql);
// 插入數(shù)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);
} 
// 關(guān)閉數(shù)據(jù)庫
database.Close();
}
CATCH_ALL(e)
{
TRACE1("Excel驅(qū)動沒有安裝: %s",sDriver);
}
END_CATCH_ALL;
}

// 讀取Excel文件
void CRWExcel::ReadFromExcel() 
{
CDatabase database;
CString sSql;
CString sItem1, sItem2;
CString sDriver;
CString sDsn;
CString sFile = "Demo.xls"; // 將被讀取的Excel文件名
// 檢索是否安裝有Excel驅(qū)動 "Microsoft Excel Driver (*.xls)" 
sDriver = GetExcelDriver();
if (sDriver.IsEmpty())
{
// 沒有發(fā)現(xiàn)Excel驅(qū)動
AfxMessageBox("沒有安裝Excel驅(qū)動!");
return;
}
// 創(chuàng)建進行存取的字符串
sDsn.Format("ODBC;DRIVER={%s};DSN='';DBQ=%s", sDriver, sFile);
TRY
{
// 打開數(shù)據(jù)庫(既Excel文件)
database.Open(NULL, false, false, sDsn);
CRecordset recset(&database);
// 設(shè)置讀取的查詢語句.
sSql = "SELECT Name, Age "
"FROM demo "
"ORDER BY Name ";
// 執(zhí)行查詢語句
recset.Open(CRecordset::forwardOnly, sSql, CRecordset::readOnly);
// 獲取查詢結(jié)果
while (!recset.IsEOF())
{
//讀取Excel內(nèi)部數(shù)值
recset.GetFieldValue("Name ", sItem1);
recset.GetFieldValue("Age", sItem2);
// 移到下一行
recset.MoveNext();
}
// 關(guān)閉數(shù)據(jù)庫
database.Close();
}
CATCH(CDBException, e)
{
// 數(shù)據(jù)庫操作產(chǎn)生異常時...
AfxMessageBox("數(shù)據(jù)庫錯誤: " + e->m_strError);
}
END_CATCH;
}
// 獲取ODBC中Excel驅(qū)動
CString CRWExcel::GetExcelDriver()
{
char szBuf[2001];
WORD cbBufMax = 2000;
WORD cbBufOut;
char *pszBuf = szBuf;
CString sDriver;
// 獲取已安裝驅(qū)動的名稱(涵數(shù)在odbcinst.h里)
if (!SQLGetInstalledDrivers(szBuf, cbBufMax, &cbBufOut))
return "";
// 檢索已安裝的驅(qū)動是否有Excel...
do
{
if (strstr(pszBuf, "Excel") != 0)
{
//發(fā)現(xiàn) !
sDriver = CString(pszBuf);
break;
}
pszBuf = strchr(pszBuf, '\0') + 1;
}
while (pszBuf[1] != '\0');
return sDriver;
}