在C＃中的自然排序 [英] Natural Sort Order in C#

问题描述

任何人有一个很好的资源或为的FileInfo 阵列提供一个自然顺序排序的样品在C＃中？我实施我的排序的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

做最简单的事情就是P /调用Windows中内置的功能，并在使用它作为比较函数你的的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);

迈克尔·卡普兰具有该功能的工作原理这里一些例子，这是变化为Vista做，使之更加直观。这个函数的加方是它会产生相同的行为Windows版本在其上运行，但是这并不意味着它的Windows版本之间的不同，所以你需要考虑这是否对你是一个问题。

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.

因此​​，一个完整的实现会是这样的：

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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