How Can I Implement Natural Sort Order for File Names in C#?

C# realize natural sorting

When sorting the file name in C#, it is usually necessary to use natural sorting algorithms instead of default dictionary sorting. This can ensure that the number is sorted in numerical, and the number of letters is sorted in appropriate order.

One way to achieve natural sorting is to use the built -in Windows function

. This function allows to compare the logical order of the string (including the number of numbers as a value) and the sorted string.

StrCmpLogicalW

DLLIMPORT

StrCmpLogicalW You can use to access Function:

DllImport Use iComparer's implementation StrCmpLogicalW

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

In order to integrate this function into your

array sort, you can implement a custom class, as shown below:

Example usage FileInfo IComparer

To use this custom comparator, you can sort the

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

array as follows:

This will sort the

arrays according to the natural order of the file name (at the same time considering the number and letter sequence of the letter).

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