C#中的自然排序 [英] Natural Sort Order in C#

问题描述

谁有很好的资源或在 C# 中为 FileInfo 数组提供自然顺序排序的示例?我正在实现 IComparer 接口.

Anyone have a good resource or provide a sample of a natural order sort in C# for an FileInfo array? I am implementing the IComparer interface in my sorts.

推荐答案

最简单的方法就是 P/Invoke Windows 中的内置函数，并将其用作 IComparer:

The easiest thing to do is just P/Invoke the built-in function in Windows, and use it as the comparison function in your IComparer:

[DllImport("shlwapi.dll", CharSet = CharSet.Unicode)]
private static extern int StrCmpLogicalW(string psz1, string psz2);

Michael Kaplan 有一些此函数如何工作的示例，以及为使 Vista 工作更直观而对 Vista 所做的更改.此功能的优点是它的行为与其运行的 Windows 版本相同，但这确实意味着它在 Windows 版本之间有所不同，因此您需要考虑这对您来说是否有问题.

Michael Kaplan has some examples of how this function works here, and the changes that were made for Vista to make it work more intuitively. The plus side of this function is that it will have the same behaviour as the version of Windows it runs on, however this does mean that it differs between versions of Windows so you need to consider whether this is a problem for you.

所以一个完整的实现应该是这样的:

So a complete implementation would be something like:

[SuppressUnmanagedCodeSecurity]
internal static class SafeNativeMethods
{
    [DllImport("shlwapi.dll", CharSet = CharSet.Unicode)]
    public static extern int StrCmpLogicalW(string psz1, string psz2);
}

public sealed class NaturalStringComparer : IComparer<string>
{
    public int Compare(string a, string b)
    {
        return SafeNativeMethods.StrCmpLogicalW(a, b);
    }
}

public sealed class NaturalFileInfoNameComparer : IComparer<FileInfo>
{
    public int Compare(FileInfo a, FileInfo b)
    {
        return SafeNativeMethods.StrCmpLogicalW(a.Name, b.Name);
    }
}

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