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Question about CFileDialog class

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

      R 1 Reply Last reply
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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
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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

              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.

                  D Offline
                  D Offline
                  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.

                      D Offline
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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

                        E Offline
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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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