Getting Assert error with CFileDialog::DoModal

[Luis E Cuadrado]

Hello everybody: Everytime that I call the function CFileDialog::DoModal I'm getting an Assert error. This is what I have in my code: if (lastFileOpenPath.GetLength() > 0) { openDlg.m_ofn.lpstrInitialDir = lastFileOpenPath; } int nResult = openDlg.DoModal(); Is there something that I'm missing? Is any of you guys had this problem before? Any answer is more than welcome. Have a good day!!! Luis E. Cuadrado :0)

[retZ]

are u sure it is getting into the if loop..if so, is lastFileOpenPath pointing to a existing directory on the machine ?? There are no failures; there are only extended learning opportunities.

[Luis E Cuadrado]

By the if...loop you mean the following? if (lastFileOpenPath.GetLength() > 0) { openDlg.m_ofn.lpstrInitialDir = lastFileOpenPath; } If so, yes. I did a step over and I was able to see it being executed. After it comes out of the if then the DoModal function throws and assert error. About lastFileOpenPath, yes is pointing to a directory in the machine. I'm able to open the file selected by the open file dialog. But I have to click Ignore when I get the assert error. Thanks, Luis E. Cuadrado :0)

[RaviBee]

What is it ASSERTing on? /ravi Let's put "civil" back in "civilization" http://www.ravib.com ravib@ravib.com

[retZ]

wait a minute ! u r assigning a CString to a LPCTSTR (openDlg.m_ofn.lpstrInitialDir = lastFileOpenPath)..i guess u have to do a casting to do that ?? There are no failures; there are only extended learning opportunities.

[Luis E Cuadrado]

It is ASSERTing in the DoModal function in the DLGFILE.CPP. The ASSERT comes out after selecting a file from the Open Dialog. This is where is ASSERTing on in the DLGFILE.CPP: if (nResult) ASSERT(pThreadState->m_pAlternateWndInit == NULL); <-- HERE pThreadState->m_pAlternateWndInit = NULL; when I check the Developer Studio's call stack, it's comming from here: if (lastFileOpenPath.GetLength() > 0) { openDlg.m_ofn.lpstrInitialDir = lastFileOpenPath; } int nResult = openDlg.DoModal(); <--- HERE I hope this helps. Thanks, Luis E. Cuadrado :0)

[RaviBee]

This is probably a dumb request, but can you post the declaration of the openDlg variable? /ravi Let's put "civil" back in "civilization" http://www.ravib.com ravib@ravib.com

[Luis E Cuadrado]

No problem. This is pretty much how the source file looks like: CFileDialog openDlg; . . . if (lastFileOpenPath.GetLength() > 0) { openDlg.m_ofn.lpstrInitialDir = (LPCTSTR)lastFileOpenPath; } int nResult = openDlg.DoModal(); Thanks, Luis E. Cuadrado :0)

[Alvaro Mendez]

I'm not familiar with the code that's failing the assertion but I read through it a bit and it seems like pThreadState->m_pAlternateWndInit is not NULL whenever the OFN_EXPLORER flag is set in the m_ofn member. Are you setting that flag yourself, by any chance? If so, try not setting it and see if it makes a difference. Regards, Alvaro

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Well done is better than well said. -- Benjamin Franklin (I actually prefer medium-well.)

[Luis E Cuadrado]

I checked and I found out that the person that wrote the code, was setting the OFN_EXPLORER tag. I commented that part out and it doesn't make a diference. It still fails the assertion. Thanks for your help!! Best regards, Luis E. Cuadrado :0)

[Alvaro Mendez]

OK, here's one last stab at this issue. Is the dialog box being created in a separate thread? If so, is it using a parent window which was created in a different thread? This may be the problem. MFC does not support related windows being created accross different threads -- I forgot exactly why, but someone here may shed some light. Regards, Alvaro

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Well done is better than well said. -- Benjamin Franklin (I actually prefer medium-well.)