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Question about CFileDialog class

Scheduled Pinned Locked Moved C / C++ / MFC
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  • E eusto

    The debugger does not take me to any line in my code. It crashes after the second filedialog has been displayed and all i get is a "Show disasembly" option which does nothing:(

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    Rajesh R Subramanian
    wrote on last edited by
    #6

    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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    • 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

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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.

                            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

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                              eusto
                              wrote on last edited by
                              #19

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

                              1 Reply 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
                                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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