在 .NET 中保留文件权限
我有一个经常被删除和重新创建的文件（我无法控制这种行为）。但是，重新创建文件时，它不会保留删除之前所拥有的权限。所以我编写了这段代码来尝试解决该问题：
var access = File.GetAccessControl(filepath, AccessControlSections.Access);
deleteAndRecreate(filepath);
File.SetAccessControl(filepath, access);
但这不起作用。如果我明确授予“TestUser”该文件的读取权限，那么在运行此代码后，TestUser 将不再具有读取权限。我做错了什么？
I have a file that is often deleted and recreated (I have no control over this behavior). However when the file is recreated, it doesn't retain the permissions that it had before it was deleted. So I wrote this code to try to fix that problem:
var access = File.GetAccessControl(filepath, AccessControlSections.Access);
deleteAndRecreate(filepath);
File.SetAccessControl(filepath, access);
But this doesn't work. If I explicitly give "TestUser" read permission for the file, then after I run this code, TestUser will no longer have read permissions. What am I doing wrong?
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不加第二个参数试试
Try it without the second parameter
我的猜测是，一旦文件被删除，
GetAccessControl返回的FileSecurity对象就不再有效。您是否尝试过类似的方法（未经测试）？
（如果这种通用方法有效，您也许能够从之前创建的
access对象中获取访问规则并重用它们。它们很可能在删除后保持有效。）My guess would be that the
FileSecurityobject returned byGetAccessControlis no longer valid once the file is deleted.Have you tried something like this instead (untested)?
(If this general approach works, you might be able to get the access rules out of the
accessobject you were creating before and reuse those. They might well stay valid through the delete.)删除文件，重新创建它，然后使用以下命令恢复原始权限：
Delete the file, recreate it and then restore the original permissions using: