Qt连接Access和SQL Server数据库

1.Qt连接Access数据库方法

1）设置数据库连接信息

 "font-size:12px;">QString sDbNm = "F:/data.accdb";//数据库文件
 db = QSqlDatabase::addDatabase("QODBC");//设置数据库驱动
 QString dsn = QString("DRIVER={Microsoft Access Driver (*.mdb, *.accdb)}; FIL={MS Access};DBQ=%1;").arg(sDbNm);//连接字符串
 db.setDatabaseName(dsn);//设置连接字符串
 db.setUserName("");//设置登陆数据库的用户名
 db.setPassword("111");//设置密码

2）操作数据库数据

 "font-size:12px;"> QStringList tables;
  QString tabName,sqlString;
  tables = db.tables(QSql::Tables);//获取表信息

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

 "font-size:12px;">{
      tabName = tables.at(i);//获取第i个表信息
      qDebug()<
      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
                 fieldName = rec.fieldName(i);
                 QByteArray ba = fieldName.toLatin1();
                 char *tmp = ba.data();
                 qDebug() <"字段名：") << fieldName <<"\t";
             }
             cout<
             while(q.next()){
                 for(int i=0;i
                     QString strTmp = q.value(i).toString();
                     QByteArray a = strTmp.toLatin1();
                     char *data = a.data();
                     qDebug()<"姓名:")<
                     qDebug()<<"\t";
                 }
                 cout<
       }
  }

2.Qt连接SQL Server数据库方法

 

#define DB_SERVER (QProcessEnvironment::systemEnvironment().value("COMPUTERNAME") + "\\SQLEXPRESS")

 db = QSqlDatabase::addDatabase("QODBC");
     QString dsn = QString("DRIVER={SQL SERVER}")
                   + ";SERVER=" + DB_SERVER
                   + ";UID=" + ""
                   + ";PWD=" + ""
                   + ";DATABASE=student";
     //如果已经设定DSN，可以写为QString::fromLocal8Bit("SQLSERVER_DSN")
     qDebug() << "name = " << DB_SERVER << "\n";
     db.setDatabaseName(dsn);
     //即使dsn中已经设置了UID和PASSWD，仍然需要执行setUserName和setPassword的步骤
     db.setUserName("");
     db.setPassword("");
     bool r = db.open();//打开数据库

 数据库操作通ACCESS数据库操作。