QSqlDatabase db;
QString servername="(local)";
QString dbname="QtSqlTest";
db = QSqlDatabase::addDatabase("QODBC");
QString dsn=QString("DRIVER={SQL SERVER};SERVER=%1;DATABASE=%2;").arg(servername).arg(dbname);
db.setDatabaseName(dsn);
db.setUserName("sa");
db.setPassword("123456");
![图片说明](https://img-ask.csdn.net/upload/201712/17/1513484542_656481.png)