ODBC Database connenction to ACCESS Database Hey guys, I got a little problem with the QODBC database connection. I have to open and use a ACCESS databasefile (.accdb) within my Qt programm, but I can't get it run. I think there is a mista
ODBC Database connenction to ACCESS Database
Hey guys,
I got a little problem with the QODBC database connection. I have to open and use a ACCESS databasefile (.accdb) within my Qt programm, but I can't get it run. I think there is a mistake in the database name but I am not that familiar with database handling so I need a little help with this. I started a simple mainwindow projekt and put all the database stuff in the main function. Here is the code:
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Source code
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#include <qtgui>
#include "mainwindow.h"
#include <qtsql>
#include <qtsql>
#include <qtsql>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
QSqlDatabase datab = QSqlDatabase::addDatabase("QODBC");
QString databasename = "DRIVER={Microsoft Access Driver (*.accdb)};FIL={MS Access};DBQ=C://Users/Thor/Pers/Projekt Madinger/Datenbank/Daten_Hauptprogramm.accdb";
datab.setDatabaseName(databasename);
if(!datab.open())
{
datab.setConnectOptions();
return 1;
}
else
return 0;
return a.exec();
}</qtsql></qtsql></qtsql></qtgui>登入後複製 |
I can run the project without any problems but the open() funktion alway returns false. Maybe its just a noob mistake but it drives me crazy
.
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ThorsFeldherr
Beginner
Posts: 3
Location: Bavaria/Germany
Occupation: Master of Engineering
2
Friday, February 24th 2012, 5:53pm
Ok now I am a little bit further. I debugged it and I cant connect because of this error:
[Microsoft][ODBC Driver Manager] Der Datenquellenname wurde nicht gefunden, und es wurde kein Standardtreiber angegeben
in English: The data source name not found and no default driver specified
Can you help me?
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Quote
ThorsFeldherr
Beginner
Posts: 3
Location: Bavaria/Germany
Occupation: Master of Engineering
3
Friday, February 24th 2012, 7:38pm
Ok I got it by myself. I post the solution in case anyone else has the same problem.
I use windows 7, 32 bit. If you want to use a database from type .mdb or .accdb with ODBC you have to register the database as datasource before you can use it via C++ in any case. It is rather simple to to do:
You go into start->system
type ODBC into the search field
the result is datasource(ODBC)-> click it
Under "User-DSN" you can add a new source
you have to choose a database (which is the one you want to use) and you can give it a sourcename for example "YOURSOURCE"
After you have done that you can call the database like that:
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Source code
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QSqlDatabase datab = QSqlDatabase::addDatabase("QODBC");
QString databasename = "YOURSOURCE";
datab.setDatabaseName(databasename);
datab.open();登入後複製 |
Now it works!
本文来源：http://www.qtforum.org/article/37487/odbc-database-connenction-to-access-database.html
