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Question about CFileDialog class

Scheduled Pinned Locked Moved C / C++ / MFC
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  • R Rajesh R Subramanian

    How can that happen! I hope you have set break points. Have you?


    Nobody can give you wiser advice than yourself. - Cicero ப்ரம்மா

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    eusto
    wrote on last edited by
    #7

    where do you want me to set brakepoints? i've set them for every line in my code but the application dies while browsing for the file (ie: CFileDialog::DoModal() never returns)

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    • E eusto

      where do you want me to set brakepoints? i've set them for every line in my code but the application dies while browsing for the file (ie: CFileDialog::DoModal() never returns)

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      Roger Stoltz
      wrote on last edited by
      #8

      What does the call stack look like? Is there any line that points to code for which you have source code? I assume you have built your application for debug...:~ -- Rog


      "It's supposed to be hard, otherwise anybody could do it!" - selfquote

      "No one remembers a coward!" - Jan Elfström 1998
      "...but everyone remembers an idiot!" - my lawyer 2005 when heard of Jan's saying above

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      • E eusto

        where do you want me to set brakepoints? i've set them for every line in my code but the application dies while browsing for the file (ie: CFileDialog::DoModal() never returns)

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        Hamid Taebi
        wrote on last edited by
        #9

        When you come to Domodal set a breakpoint after it


        WhiteSky


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        • H Hamid Taebi

          When you come to Domodal set a breakpoint after it


          WhiteSky


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          eusto
          wrote on last edited by
          #10

          ...it dies during CFileDialog::DoModal() method (i mean, it dies while my dialog waits for CFileDialog::DoModal() to return)

          7CA5159E call dword ptr [ecx+14h]

          That's the disassembly code, but i don't know what to do with it, i don't think it helps

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          • R Roger Stoltz

            What does the call stack look like? Is there any line that points to code for which you have source code? I assume you have built your application for debug...:~ -- Rog


            "It's supposed to be hard, otherwise anybody could do it!" - selfquote

            "No one remembers a coward!" - Jan Elfström 1998
            "...but everyone remembers an idiot!" - my lawyer 2005 when heard of Jan's saying above

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            eusto
            wrote on last edited by
            #11

            no...debug does not point to my code:(

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            • E eusto

              ...it dies during CFileDialog::DoModal() method (i mean, it dies while my dialog waits for CFileDialog::DoModal() to return)

              7CA5159E call dword ptr [ecx+14h]

              That's the disassembly code, but i don't know what to do with it, i don't think it helps

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              Rajesh R Subramanian
              wrote on last edited by
              #12

              Did you try displaying a message box before and after your CFileDialog creation? What happens in that case?


              Nobody can give you wiser advice than yourself. - Cicero ப்ரம்மா

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              • E eusto

                I have a dialog with two browse buttons on it. If i press the frist one, select a file than press the seccond one, my application crashes and i can't figure out why :( . Here's the code:

                //first browse button
                void CAddEquipDlg::OnBnClickedBrowsedb()
                {
                char szFilters[]=
                "Access DB (*.mdb)|*.mdb|All Files (*.*)|*.*||";

                CFileDialog fDlg(TRUE,
                    "mdb",
                    "\*.mdb",
                    OFN\_FILEMUSTEXIST| OFN\_HIDEREADONLY,
                    szFilters, 
                    NULL
                    );
                if (fDlg.DoModal()==IDOK)
                {
                    m\_sDB = fDlg.GetPathName();
                }
                SetCurrentDirectory(m\_sCurDir);
                SetDlgItemText(IDC\_DB,m\_sDB);
                AfxGetApp()->WriteProfileString("Connection", "Database",m\_sDB);
                

                }
                //seccond browse button
                void CAddEquipDlg::OnBnClickedBrowseequip()
                {

                char szFilters\[\]=
                    "CSV Files (\*.csv)|\*.csv|All Files (\*.\*)|\*.\*||";
                
                CFileDialog fDlg(TRUE,
                    "csv",
                    "\*.csv",
                    OFN\_FILEMUSTEXIST| OFN\_HIDEREADONLY,
                    szFilters, 
                    NULL
                    );
                if (fDlg.DoModal()==IDOK)
                {
                    CString bla = fDlg.GetFileTitle();
                    m\_sEQUIP = fDlg.GetPathName();
                }
                SetCurrentDirectory(m\_sCurDir);
                SetDlgItemText(IDC\_EQUIP,m\_sEQUIP);    
                

                }

                It crashes two out of tree times (with a send/don't send error message in release) and this is the debug info

                First-chance exception at 0x7ca5159e in AddEquip.exe: 0xC0000005: Access violation reading location 0x62883720.
                Unhandled exception at 0x7ca5159e in AddEquip.exe: 0xC0000005: Access violation reading location 0x62883720.

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                David Crow
                wrote on last edited by
                #13

                eusto wrote:

                If i press the frist one, select a file than press the seccond one, my application crashes...

                What happens if you reverse this process? Which of the four statements after DoModal() is crashing? Set a breakpoint to find out.


                "Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

                "Judge not by the eye but by the heart." - Native American Proverb

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                • R Rajesh R Subramanian

                  Did you try displaying a message box before and after your CFileDialog creation? What happens in that case?


                  Nobody can give you wiser advice than yourself. - Cicero ப்ரம்மா

                  E Offline
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                  eusto
                  wrote on last edited by
                  #14

                  it dies only if there's verry little time between pressing the two buttons. If i put a message box anywhere...it will work

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                  • D David Crow

                    eusto wrote:

                    If i press the frist one, select a file than press the seccond one, my application crashes...

                    What happens if you reverse this process? Which of the four statements after DoModal() is crashing? Set a breakpoint to find out.


                    "Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

                    "Judge not by the eye but by the heart." - Native American Proverb

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                    eusto
                    wrote on last edited by
                    #15

                    None of the four statements after DoModal() is crashing!..none! DoModal() doesn't even return. Anyways, i've narrowed it down. It crashes when i move trough folders in the CFileDialog window. And it doesn't really matter wich of the two buttons i press first.

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                    • E eusto

                      None of the four statements after DoModal() is crashing!..none! DoModal() doesn't even return. Anyways, i've narrowed it down. It crashes when i move trough folders in the CFileDialog window. And it doesn't really matter wich of the two buttons i press first.

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                      David Crow
                      wrote on last edited by
                      #16

                      This is just a complete guess, but how about commenting out everything after the DoModal() call?


                      "Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

                      "Judge not by the eye but by the heart." - Native American Proverb

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                      • D David Crow

                        This is just a complete guess, but how about commenting out everything after the DoModal() call?


                        "Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

                        "Judge not by the eye but by the heart." - Native American Proverb

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                        eusto
                        wrote on last edited by
                        #17

                        this was my last resort too but it still failed :(. I'm putting this thing to rest and i'll get to it some other time... Maybe there's a problem with my computer( a virus or smth...don't know ). The problem is clearly in the CFileDialog class but i can't figure it out.

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                        • E eusto

                          this was my last resort too but it still failed :(. I'm putting this thing to rest and i'll get to it some other time... Maybe there's a problem with my computer( a virus or smth...don't know ). The problem is clearly in the CFileDialog class but i can't figure it out.

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                          David Crow
                          wrote on last edited by
                          #18

                          eusto wrote:

                          The problem is clearly in the CFileDialog class...

                          To further verify that, use GetOpenFileName() instead.


                          "Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

                          "Judge not by the eye but by the heart." - Native American Proverb

                          E 2 Replies Last reply
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                          • D David Crow

                            eusto wrote:

                            The problem is clearly in the CFileDialog class...

                            To further verify that, use GetOpenFileName() instead.


                            "Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

                            "Judge not by the eye but by the heart." - Native American Proverb

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                            eusto
                            wrote on last edited by
                            #19

                            I've used GetOpenFileName() and it behaves just the same :(

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                            • D David Crow

                              eusto wrote:

                              The problem is clearly in the CFileDialog class...

                              To further verify that, use GetOpenFileName() instead.


                              "Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

                              "Judge not by the eye but by the heart." - Native American Proverb

                              E Offline
                              E Offline
                              eusto
                              wrote on last edited by
                              #20

                              Nevermind, sorry for bugging you so much. I've recompiled the project on another machine and it works like a charm. I guess the problem is in my VStudio instalation or something...i don't know

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