Qt 无法创建/写入 C:\
我正在编写一个 Qt 程序（最初适用于 Windows 7 4.7），需要写入安装目录（C:\Program Files...）。当我尝试写入“受保护”的位置（程序文件、C:\ 等）时，没有创建任何文件。但是，QFile 没有给我任何错误代码（error() 返回 0，这意味着它工作正常）。
这是我正在使用的代码片段，但它不起作用。我正在程序中稍后关闭该文件。
QApplication a(argc, argv);
// Setting plugin paths.
QStringList paths = QCoreApplication::libraryPaths();
paths.append(QCoreApplication::applicationDirPath());
QCoreApplication::setLibraryPaths(paths);
// Debug file.
QString path = QCoreApplication::applicationDirPath() + "/debug.dat";
//QFile debugFile(QCoreApplication::applicationDirPath() + "/debug.dat");
QFile debugFile("C:/debug.txt");
qDebug() << debugFile.error();
debugFile.setPermissions(QFile::WriteUser | QFile::WriteGroup | QFile::WriteOwner | QFile::WriteOther);
debugFile.open(QFile::WriteOnly);
QTextStream debugStream(&debugFile);
// Processing the arguments.
debugStream << QString("Processing Arguments\n");
有人对如何解决这个问题有任何建议吗？
感谢您的帮助，
Jec
添加清单文件是我选择解决此问题的途径。
感谢您的所有帮助。
I am writing a Qt program (4.7 for windows 7 initially) that requires writing to the installed directory (C:\Program Files...). No files are being created when I try to write to a location that would be "protected" (program files, C:\ etc). However, QFile is not giving me any error code (error() is returning 0 which means it worked fine).
Here is a code snippit that I am using that is not working. I am closing the file its just much later in the program.
QApplication a(argc, argv);
// Setting plugin paths.
QStringList paths = QCoreApplication::libraryPaths();
paths.append(QCoreApplication::applicationDirPath());
QCoreApplication::setLibraryPaths(paths);
// Debug file.
QString path = QCoreApplication::applicationDirPath() + "/debug.dat";
//QFile debugFile(QCoreApplication::applicationDirPath() + "/debug.dat");
QFile debugFile("C:/debug.txt");
qDebug() << debugFile.error();
debugFile.setPermissions(QFile::WriteUser | QFile::WriteGroup | QFile::WriteOwner | QFile::WriteOther);
debugFile.open(QFile::WriteOnly);
QTextStream debugStream(&debugFile);
// Processing the arguments.
debugStream << QString("Processing Arguments\n");
Does anyone have any tips on how to solve this problem?
Thanks for the help,
Jec
Adding a manifest file is the route I choose to fix this problem.
Thanks for all of the help.
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您是否检查过该文件是否未在 VirtualStore 中为该用户创建？检查应用程序和服务日志下的事件查看器 ->微软->窗口 -> UacFile虚拟化->操作。如果您看到事件 ID 为 5000 的条目，则表明发生了 FileCreateVirtualExclude 事件。
检查文件是否未在
%USERPROFILE%\AppData\Local\VirtualStore下创建。如果确实如此，您可能需要嵌入请求所需权限的清单（即关闭虚拟化）。有关详细信息，请参阅 适用于 Windows Vista 的新 UAC 技术（向下滚动并查找虚拟化。）
Have you checked whether the file isn't created in the VirtualStore for that user? Check the Event Viewer under Applications and Services Logs -> Microsoft -> Windows -> UacFileVirtualization -> Operational. If you see entries with event ID 5000, a FileCreateVirtualExclude event has occurred.
Check if the file didn't get created under
%USERPROFILE%\AppData\Local\VirtualStore. If it did, you might need to embed a manifest requesting the required privileges (i.e., turning virtualization off.)For more details, see New UAC Technologies for Windows Vista (scroll down and look for Virtualization.)
您需要获得足够的用户访问权限（即“以管理员身份运行”）才能在 Windows Vista+ 中写入此类文件夹。以管理员身份启动应用程序，或通过调用 WinAPI 请求管理员权限。
You need to acquire sufficient user access rights (ie "Run as Administrator") to write to such folders in Windows Vista+. Either start the app as administrator, or ask for Administrator rights via a call to WinAPI.
QFile 可能会向您提供错误代码，但您未能检查它。
您应该做的事情更像是：
您已经检查了
QFile::error的返回值，但仅在调用open之前 - 您需要打开尝试后检查。QFile may be giving you an error code, but you've failed to check for it.
You should do something more like:
You've checked the return value of
QFile::error, but only before callingopen- you need to check after the open attempt.