使用QT对access数据库进行操作——————数据库中表、记录和域的读取

#include <QTextStream>

#include <QtDebug>

#include <QSqlDatabase>

#include <QStringList>

#include <QSqlError>

#include <QSqlIndex>

#include <QSqlRecord>

#include <QSqlQuery>

#include <QVariant>

int main(int argc, char *argv[])

{

QCoreApplication a(argc, argv);

//连接数据库

QSqlDatabase db = QSqlDatabase::addDatabase("QODBC");

db.setDatabaseName("DRIVER={Microsoft Access Driver (*.mdb)};FIL={MS Access};DBQ=I:/mycode/ConnectAccess/test.mdb");

QString out_str;

QTextStream out(stdout);

QSqlError err;

QSqlRecord record;

bool ok = db.open();

if(ok){//success

//读数据库中的表

QStringList tables;

QString tabName,sqlString;

tables = db.tables(QSql::Tables);

//读表中记录

for (int i = 0; i < tables.size(); ++i){

tabName = tables.at(i);

qDebug()<<tabName;

sqlString = "select * from " + tabName;

QSqlQuery q(sqlString);

//QSqlQuery q("select * from product");

QSqlRecord rec = q.record();

int fieldCount = rec.count();

qDebug() << "Number of columns: " << fieldCount;

int i;

QString fieldName;

for(i=0;i<fieldCount;i++){

fieldName = rec.fieldName(i);

out<<fieldName<<"\t";

}

out<<endl;

while(q.next()){

for(int i=0;i<fieldCount;i++){

out<<q.value(i).toString();

out<<"\t";

}

  out<<endl;

 }

}

}

else{//fail

out_str="open fail\n";

out << out_str <<endl;

err = db.lastError();

out_str = err.databaseText();

out << out_str <<endl;

out_str = err.driverText();

out << out_str <<endl;

}

 return a.exec();

}