How to call Shell Execute using Qt connect function?

Question

I have following function call:

sparseAct =new QAction(QIcon(":Icons/icons/sparse.jpg"),tr("Sparse Reconstruction"),this);

connect(sparseAct, SIGNAL(triggered()),this, SLOT(sparsereconstruction()));

and

void UAVgeoreferencer::sparsereconstruction(){

ShellExecute(NULL, L"open", L"C:\\WINDOWS\\system32\\cmd.exe", L"/C C:\\Images\\sparseRecon64.bat", L"C:\\Images\\", SW_SHOWNORMAL);

}

When I do this I get error like:

uavgeoreferencer.obj:-1: error: LNK2019: unresolved external symbol __imp_ShellExecuteW referenced in function "private: void __cdecl UAVgeoreferencer::sparsereconstruction(void)" (?sparsereconstruction@UAVgeoreferencer@@AEAAXXZ)

Can anyone tell me what is the problem and how can I solve it??

I think you should link your program against Shell32.lib library too in order to use its ShellExecute function, or you need to use QProcess to execute the sparseRecon64.bat script. — vahancho
– vahancho, Commented Apr 8, 2015 at 10:07
Seems like a bit of an XY problem. I'd use QProcess for this. — Retired Ninja
– Retired Ninja, Commented Apr 8, 2015 at 10:07

max · Accepted Answer · 2015-04-08 10:24:15Z

1

You can use QProcess for this purpose since it inherits QObject and QIODevice, you have everything you need to pass data between other Qt objects you might be using but you don't have to. You can always create your own objects that inherit from QObject and then implement signals and slots mechanism but QProcess will make life easier as it has already everything one might possibly need for shell access. However, the problem you are facing is related to the linker and has nothing to do with Signals and Slots mechanism.

edited Apr 8, 2015 at 10:24

answered Apr 8, 2015 at 10:12

max

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Predelnik · Accepted Answer · 2015-04-08 10:08:42Z

0

Most likely you have forgotten to link required windows library to your project. Try adding this to your .pro file:

LIBS *= Shell32.lib

answered Apr 8, 2015 at 10:08

Predelnik

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