Question

I am trying to connect to SQL Server 2008R2 with my qt application in windows but I am getting errors. Here’s what I am doing:

#include "ui_test1.h";
#include "QtSql/QtSql";

void Test1::on_btnsnd_clicked()
{
    QSqlDatabase db = QSqlDatabase::addDatabase("ODBC");

    db.setHostName("ITPL_PC1");
    db.setDatabaseName("Test");
    db.setUserName("sa");
    db.setPassword("insforia");
    db.open();
    QSqlQueryModel *model = new QSqlQueryModel;

    QString query = "insert into qttable(PID) values('ARUP')";
    model->setQuery(query, db);

    db.close();
}

i am getting this error 27 times :

 test1.obj:-1: error: LNK2019: unresolved external symbol "__declspec(dllimport)        public: __thiscall QSqlDatabase::~QSqlDatabase(void)" (__imp_??1QSqlDatabase@@QAE@XZ) referenced in function "private: void __thiscall Test1::on_btnsnd_clicked(void)" (?on_btnsnd_clicked@Test1@@AAEXXZ)

I don’t know how to do this (I found this in google.)

What should I do to fix it?

Answer 1

If you use MSVC, you should add %QTDIR%/lib/QtSql4.lib to Release configuration of your project and %QTDIR%/lib/QtSqld4.lib to Debug one. You should change 4 in file names to 500, if you use Qt 5.0. So, file names would be %QTDIR%/lib/QtSql500.lib and %QTDIR%/lib/QtSqld500.lib

---

If you use QtCreator you should add the next line into your .pro file

QT += sql

Upd: added description for QtCreator’s .pro file