Re: [Dev-C++] saving text from EDIT control

[Per W. <pw...@ia...>]

Hrm. Check once more how you use lpstrFile and nMaxFile.

You want your file name in a writeable buffer.

saveFileInfo.lpstrFile = "Untitled.txt"
assumes lpstrFile to be a pointer.

saveFileInfo.nMaxFile = sizeof(saveFileInfo.lpstrFile)
assumes lpstrFile to be a character buffer - a pointer always have a fixed
size and doesn't say anything about number of characters possible to store
in the buffer.

/Per W

On Mon, 6 Jun 2005, Noorez Kassam wrote:

> Sry, resend.
>
> For my program, I need a part that is like a simple text editor, but I can't
> get the 'save' function to work. This error is received while debugging :
> 'An Access Violation (Segmentation Fault) raised in your program'  at the
> marked line. I attached the entire program so that you can try to run it.
>
> void SaveText(HWND main)
> {
> int length;
> char* buffer;
>
> length = GetWindowTextLength(GetDlgItem(main, IDC_MAIN_EDIT));
>
> if(length>0)
> {
>    OPENFILENAME saveFileInfo;
>
>    saveFileInfo.lStructSize = sizeof(saveFileInfo);
>    saveFileInfo.hwndOwner = main;
>    saveFileInfo.hInstance = gThisInstance;
>    saveFileInfo.lpstrFilter = ".TXT"+'\0';
>    saveFileInfo.lpstrCustomFilter = '\0';
>    saveFileInfo.nMaxCustFilter = 0;
>    saveFileInfo.nFilterIndex = 1;
>    saveFileInfo.lpstrFile = "Untitled.txt";
>    saveFileInfo.nMaxFile = sizeof( saveFileInfo.lpstrFile );
>    saveFileInfo.lpstrFileTitle = 0;
>    saveFileInfo.lpstrInitialDir = "C:\\";
>    saveFileInfo.lpstrTitle = "Hey";
>    saveFileInfo.nFileOffset = 0;
>    saveFileInfo.nFileExtension = 0;
>    saveFileInfo.lCustData = 0;
>    saveFileInfo.lpstrDefExt = 0;
>    saveFileInfo.Flags = OFN_HIDEREADONLY;
>    saveFileInfo.lpfnHook = (LPOFNHOOKPROC)0;
>    saveFileInfo.lpTemplateName = 0;
>
>
>    GetSaveFileName(&saveFileInfo); //error is here in debugging
>    buffer = new char[length+1];
>    GetDlgItemText(main, IDC_MAIN_EDIT, buffer, length + 1);
>    ifstream saveTextFile("SaveText.txt", ios::binary);
>    saveTextFile >> buffer;
>    saveTextFile.close();
>    delete buffer;
>
> }
> }
>