.Net 库在保留时间戳的同时移动/复制文件

发布于 2024-12-01 07:20:03 字数 112 浏览 5 评论 0 原文

有谁知道 .Net 库可以在不更改任何时间戳的情况下复制/粘贴或移动文件。我正在寻找的功能包含在一个名为 robocopy.exe 的程序中，但我希望无需共享该二进制文件即可使用此功能。

想法？

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老街孤人 2024-12-08 07:20:03

public static void CopyFileExactly(string copyFromPath, string copyToPath)
{
    var origin = new FileInfo(copyFromPath);

    origin.CopyTo(copyToPath, true);

    var destination = new FileInfo(copyToPath);
    destination.CreationTime = origin.CreationTime;
    destination.LastWriteTime = origin.LastWriteTime;
    destination.LastAccessTime = origin.LastAccessTime;
}

public static void CopyFileExactly(string copyFromPath, string copyToPath)
{
    var origin = new FileInfo(copyFromPath);

    origin.CopyTo(copyToPath, true);

    var destination = new FileInfo(copyToPath);
    destination.CreationTime = origin.CreationTime;
    destination.LastWriteTime = origin.LastWriteTime;
    destination.LastAccessTime = origin.LastAccessTime;
}

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流绪微梦 2024-12-08 07:20:03

当没有管理权限执行时，Roy 的答案将在尝试覆盖现有只读文件或尝试在复制的只读文件上设置时间戳时抛出异常（UnauthorizedAccessException）。

以下解决方案基于 Roy 的答案，但将其扩展为覆盖只读文件并更改复制的只读文件的时间戳，同时保留文件的只读属性，同时仍然在没有管理员权限的情况下执行。

public static void CopyFileExactly(string copyFromPath, string copyToPath)
{
    if (File.Exists(copyToPath))
    {
        var target = new FileInfo(copyToPath);
        if (target.IsReadOnly)
            target.IsReadOnly = false;
    }

    var origin = new FileInfo(copyFromPath);
    origin.CopyTo(copyToPath, true);

    var destination = new FileInfo(copyToPath);
    if (destination.IsReadOnly)
    {
        destination.IsReadOnly = false;
        destination.CreationTime = origin.CreationTime;
        destination.LastWriteTime = origin.LastWriteTime;
        destination.LastAccessTime = origin.LastAccessTime;
        destination.IsReadOnly = true;
    }
    else
    {
        destination.CreationTime = origin.CreationTime;
        destination.LastWriteTime = origin.LastWriteTime;
        destination.LastAccessTime = origin.LastAccessTime;
    }
}

When executing without administrative privileges Roy's answer will throw an exception (UnauthorizedAccessException) when attempting to overwrite existing read only files or when attempting to set the timestamps on copied read only files.

The following solution is based on Roy's answer but extends it to overwrite read only files and to change the timestamps on copied read only files while preserving the read only attribute of the file all while still executing without admin privilege.

public static void CopyFileExactly(string copyFromPath, string copyToPath)
{
    if (File.Exists(copyToPath))
    {
        var target = new FileInfo(copyToPath);
        if (target.IsReadOnly)
            target.IsReadOnly = false;
    }

    var origin = new FileInfo(copyFromPath);
    origin.CopyTo(copyToPath, true);

    var destination = new FileInfo(copyToPath);
    if (destination.IsReadOnly)
    {
        destination.IsReadOnly = false;
        destination.CreationTime = origin.CreationTime;
        destination.LastWriteTime = origin.LastWriteTime;
        destination.LastAccessTime = origin.LastAccessTime;
        destination.IsReadOnly = true;
    }
    else
    {
        destination.CreationTime = origin.CreationTime;
        destination.LastWriteTime = origin.LastWriteTime;
        destination.LastAccessTime = origin.LastAccessTime;
    }
}

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