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  4. can not delete a file

can not delete a file

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  • G George_George

    Thanks Jonathan, I have tried and slightly modified your program to make it compile. :-) Now the error condition is, error number 2 -- system can not find specified file. I am confused since the file actually exists. I need to using absolute path other than relative path to delete the file? int remove_non_empty_directory(const char* path) { WIN32_FIND_DATA FindFileData; int rtn; HANDLE hFind = FindFirstFile(path, &FindFileData); int bDelete = 0; if (hFind == INVALID_HANDLE_VALUE) { FindClose(hFind); return -1; } else { if((_tcscmp((LPCSTR)FindFileData.cFileName, "..") == 0) || (_tcscmp((LPCSTR)FindFileData.cFileName, ".") == 0)) { bDelete = 0; } if(bDelete) // delete 1st file { rtn = DeleteFile((LPCSTR)FindFileData.cFileName); // .... original error handling code } // List all the other files in the directory and delete all file while (FindNextFile(hFind, &FindFileData) != 0) { bDelete = 1; if((_tcscmp((LPCSTR)FindFileData.cFileName, "..") == 0) || (_tcscmp((LPCSTR)FindFileData.cFileName, ".") == 0)) { bDelete = 0; } if(bDelete) { rtn = DeleteFile((LPCSTR)FindFileData.cFileName); if (0 == rtn) { ErrorExit (NULL); } } } FindClose(hFind); } return 0; } regards, George

    J Offline
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    Jonathan Darka
    wrote on last edited by
    #14

    George_George wrote:

    I have tried and slightly modified your program to make it compile.

    :-)

    George_George wrote:

    I need to using absolute path other than relative path to delete the file?

    Yes, in this case you should. regards,

    Jonathan Wilkes Darka[Xanya.net]

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    • D Don Box

      Hello George_George, I'll tell u the exact problem u r having and how to rectify it. Your Code:------------------------------------------------- int remove_non_empty_directory (const char* path) { WIN32_FIND_DATA FindFileData; HANDLE hFind; int rtn; hFind = FindFirstFile(path, &FindFileData); if (hFind == INVALID_HANDLE_VALUE) { FindClose(hFind); return -1; } else { // delete 1st file rtn = DeleteFile(&(FindFileData.cFileName)); `` if (0 == rtn) { ErrorExit (NULL); } // List all the other files in the directory and delete all files while (FindNextFile(hFind, &FindFileData) != 0) { rtn = DeleteFile(&(FindFileData.cFileName)); `} FindClose(hFind); }` `` ---------------------------------------------------------- The problem lies in the highlighted lines. FindFileData.cFileName contains only the FILE NAME, NOT PATH. So the problem. Rectify it by replacing the highlighted lines by DeleteFile(path);

      Come online at:- jubinc@skype

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      Jonathan Darka
      wrote on last edited by
      #15

      Don Box wrote:

      Rectify it by replacing the highlighted lines by DeleteFile(path);

      That won't work as he is most likely passing in just a folder name, or a folder name with a wildcard attached. He should take the original path (excluding wildcard) and then add the filename from FindFileData.cFileName and then Delete that. regards,

      Jonathan Wilkes Darka[Xanya.net]

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      • J Jonathan Darka

        George_George wrote:

        I have tried and slightly modified your program to make it compile.

        :-)

        George_George wrote:

        I need to using absolute path other than relative path to delete the file?

        Yes, in this case you should. regards,

        Jonathan Wilkes Darka[Xanya.net]

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        George_George
        wrote on last edited by
        #16

        Thanks Jonathan, I have tried that if I am using absolute path, it works! regards, George

        1 Reply Last reply
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        • J Jonathan Darka

          which line is producing error 2, and what is the value of FindFileData.cFileName at that point ?

          Jonathan Wilkes Darka[Xanya.net]

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          George_George
          wrote on last edited by
          #17

          Relative file name. regards, George

          1 Reply Last reply
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          • J Jonathan Darka

            George_George wrote:

            Any further debug ideas?

            See my last post regarding '.' and '..'

            Jonathan Wilkes Darka[Xanya.net]

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            George_George
            wrote on last edited by
            #18

            Yes, they are the key points. regards, George

            1 Reply Last reply
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            • S SandipG

              I think it happens because FindFile Handle i.e. hFind is open. I have faced similar issue with CFileFind.Try to delete after you close the handle.

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              George_George
              wrote on last edited by
              #19

              Hi SandipG, I have tried that it does not matter. regards, George

              1 Reply Last reply
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              • D Don Box

                Hello George_George, I'll tell u the exact problem u r having and how to rectify it. Your Code:------------------------------------------------- int remove_non_empty_directory (const char* path) { WIN32_FIND_DATA FindFileData; HANDLE hFind; int rtn; hFind = FindFirstFile(path, &FindFileData); if (hFind == INVALID_HANDLE_VALUE) { FindClose(hFind); return -1; } else { // delete 1st file rtn = DeleteFile(&(FindFileData.cFileName)); `` if (0 == rtn) { ErrorExit (NULL); } // List all the other files in the directory and delete all files while (FindNextFile(hFind, &FindFileData) != 0) { rtn = DeleteFile(&(FindFileData.cFileName)); `} FindClose(hFind); }` `` ---------------------------------------------------------- The problem lies in the highlighted lines. FindFileData.cFileName contains only the FILE NAME, NOT PATH. So the problem. Rectify it by replacing the highlighted lines by DeleteFile(path);

                Come online at:- jubinc@skype

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                George_George
                wrote on last edited by
                #20

                Thanks Don! It works! Cool! regards, George

                1 Reply Last reply
                0
                • J Jonathan Darka

                  Don Box wrote:

                  Rectify it by replacing the highlighted lines by DeleteFile(path);

                  That won't work as he is most likely passing in just a folder name, or a folder name with a wildcard attached. He should take the original path (excluding wildcard) and then add the filename from FindFileData.cFileName and then Delete that. regards,

                  Jonathan Wilkes Darka[Xanya.net]

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                  G Offline
                  George_George
                  wrote on last edited by
                  #21

                  You are always right, Jonathan! regards, George

                  J 1 Reply Last reply
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                  • G gvisgr8

                    Are you sure that those files are not read only. As once i wasalso facing the same problem but after checking out read only attribute. it was working fine...

                    Who am I? Do you know me....:omg:

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                    George_George
                    wrote on last edited by
                    #22

                    Sure, gvisgr8. I have enough privilege. regards, George

                    D 1 Reply Last reply
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                    • B Bryster

                      Hi I was just looking at your problem and why not try someting completely different. You could create a batch file which deletes the files within a folder. 1. Create a new text file for writing to (say on your c:\) with the extension of ".BAT" 2. Write to that file the path of the directory you want to delete, fprintf(cfile,"del %s\*.*",pathname) 3. Close the file 4. Using the SPOOL command run the file. Just a quick solution to your problem. Bry.:-D

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                      George_George
                      wrote on last edited by
                      #23

                      Thanks Bryster, I need to implement through Windows API to be more efficient. :-) regards, George

                      1 Reply Last reply
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                      • G George_George

                        You are always right, Jonathan! regards, George

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                        Jonathan Darka
                        wrote on last edited by
                        #24

                        George_George wrote:

                        You are always right, Jonathan!

                        Only most of the time ;-) best wishes,

                        Jonathan Wilkes Darka[Xanya.net]

                        1 Reply Last reply
                        0
                        • G George_George

                          Hello everyone, I am using the following program to delete all files in a specified directory. But when running, no files could be deleted, and the related error information is, failed with error 5 -- access denied. Anything wrong with the program? remove_non_empty_directory ("c:\\temp\\non_empty_dir\\*"); // ErrorExit implementation from MSDN // http://msdn2.microsoft.com/en-us/library/ms680582.aspx int remove_non_empty_directory (const char* path) { WIN32_FIND_DATA FindFileData; HANDLE hFind; int rtn; hFind = FindFirstFile(path, &FindFileData); if (hFind == INVALID_HANDLE_VALUE) { FindClose(hFind); return -1; } else { // delete 1st file rtn = DeleteFile(&(FindFileData.cFileName)); if (0 == rtn) { ErrorExit (NULL); } // List all the other files in the directory and delete all files while (FindNextFile(hFind, &FindFileData) != 0) { rtn = DeleteFile(&(FindFileData.cFileName)); } FindClose(hFind); } return 0; } thanks in advance, George

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                          David Crow
                          wrote on last edited by
                          #25

                          George_George wrote:

                          I am using the following program to delete all files in a specified directory.

                          Why not just use SHFileOperation()?

                          "A good athlete is the result of a good and worthy opponent." - David Crow

                          "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

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                          • G George_George

                            Sure, gvisgr8. I have enough privilege. regards, George

                            D Offline
                            D Offline
                            David Crow
                            wrote on last edited by
                            #26

                            George_George wrote:

                            Sure, gvisgr8.

                            I'm not gvisgr8.

                            George_George wrote:

                            I have enough privilege.

                            I was not concerned with privileges. I was simply suggesting replacing dozens of lines of code with a single one.

                            "A good athlete is the result of a good and worthy opponent." - David Crow

                            "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

                            G 1 Reply Last reply
                            0
                            • D David Crow

                              George_George wrote:

                              I am using the following program to delete all files in a specified directory.

                              Why not just use SHFileOperation()?

                              "A good athlete is the result of a good and worthy opponent." - David Crow

                              "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

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                              G Offline
                              George_George
                              wrote on last edited by
                              #27

                              Because I suspect on Windows Mobile it is not supported -- I need to write program for both Windows desktop and Window CE. regards, George

                              1 Reply Last reply
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                              • D David Crow

                                George_George wrote:

                                Sure, gvisgr8.

                                I'm not gvisgr8.

                                George_George wrote:

                                I have enough privilege.

                                I was not concerned with privileges. I was simply suggesting replacing dozens of lines of code with a single one.

                                "A good athlete is the result of a good and worthy opponent." - David Crow

                                "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

                                G Offline
                                G Offline
                                George_George
                                wrote on last edited by
                                #28

                                How?

                                DavidCrow wrote:

                                I was simply suggesting replacing dozens of lines of code with a single one.

                                regards, George

                                D 1 Reply Last reply
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                                • G George_George

                                  How?

                                  DavidCrow wrote:

                                  I was simply suggesting replacing dozens of lines of code with a single one.

                                  regards, George

                                  D Offline
                                  D Offline
                                  David Crow
                                  wrote on last edited by
                                  #29

                                  George_George wrote:

                                  How?

                                  By using SHFileOperation() instead.

                                  "A good athlete is the result of a good and worthy opponent." - David Crow

                                  "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

                                  G 1 Reply Last reply
                                  0
                                  • D David Crow

                                    George_George wrote:

                                    How?

                                    By using SHFileOperation() instead.

                                    "A good athlete is the result of a good and worthy opponent." - David Crow

                                    "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

                                    G Offline
                                    G Offline
                                    George_George
                                    wrote on last edited by
                                    #30

                                    Thanks DavidCrow, This function is convenient to use, but I am not sure whether we can use it on Windows CE. regards, George

                                    1 Reply Last reply
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