我如何比较（目录）在C＃中的路径？ [英] How can I compare (directory) paths in C#?

问题描述

如果我有两个的DirectoryInfo 的对象，我怎么能对它们进行比较语义的平等？例如，下面的路径都应该被视为等于 C：\ TEMP ：

If I have two DirectoryInfo objects, how can I compare them for semantic equality? For example, the following paths should all be considered equal to C:\temp:

• C：\ TEMP
• C：\ TEMP \
• C：\ TEMP \
• C：\ TEMP \ x \ .. \ .. \ TEMP \

• C:\temp
• C:\temp\
• C:\temp\.
• C:\temp\x\..\..\temp\.

下面可能会或可能不等于 C：\ TEMP ：

The following may or may not be equal to C:\temp:

• \ TEMP 如果当前的工作目录是驱动器 C：\
• 温度如果当前工作目录是 C：\
• C：\ TEMP
• C：\ TEMP \

• \temp if the current working directory is on drive C:\
• temp if the current working directory is C:\
• C:\temp.
• C:\temp...\

如果它要考虑当前的工作目录是很重要的，我能明白这一点我自己，所以这不是那么重要。小圆点是Windows剥离，因此这些路径确实应该是平等的 - 但他们没有在UNIX中剥离，所以下单我希望其他的结果。

If it's important to consider the current working directory, I can figure that out myself, so that's not that important. Trailing dots are stripped in windows, so those paths really should be equal - but they aren't stripped in unix, so under mono I'd expect other results.

区分大小写是可选的。该路径可能或可能不存在，并且用户可以或可以不具有权限的路径 - 我最好preFER一种快速可靠的方法，不需要任何的I / O（所以没有权限检查），但如果有一些内置的我很乐意与任何足够好太...

Case sensitivity is optional. The paths may or may not exist, and the user may or may not have permissions to the path - I'd prefer a fast robust method that doesn't require any I/O (so no permission checking), but if there's something built-in I'd be happy with anything "good enough" too...

推荐答案

从这个答案，这种方法可以处理一些边缘情况：

From this answer, this method can handle a few edge cases:

public static string NormalizePath(string path)
{
    return Path.GetFullPath(new Uri(path).LocalPath)
               .TrimEnd(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar)
               .ToUpperInvariant();
}

在原来的答案更多细节。这样称呼它：

More details in the original answer. Call it like:

bool pathsEqual = NormalizePath(path1) == NormalizePath(path2);

应同时适用于文件和目录路径。

Should work for both file and directory paths.

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