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Question about CFileDialog class

Scheduled Pinned Locked Moved C / C++ / MFC
databasedata-structuresdebugginghelpquestion
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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

        R Offline
        R Offline
        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.

          D Offline
          D Offline
          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
            E Offline
            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

            1 Reply Last reply
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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

              E Offline
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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

                  E Offline
                  E Offline
                  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

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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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