can't sort files from folder in String[] Array

Question

my project is about recording screen as sequence of images then instead of make it as video i planed to load all image directories to list and use timer to view them image by im

Answer 1

You need to use a "natural sort order" comparer when sorting the array of strings.

The easiest way to do this is to use P/Invoke to call the Windows built-in one, StrCmpLogicalW(), like so (this is a compilable Console application):

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Security;

namespace ConsoleApp1
{
    [SuppressUnmanagedCodeSecurity]
    internal static class NativeMethods
    {
        [DllImport("shlwapi.dll", CharSet = CharSet.Unicode)]
        public static extern int StrCmpLogicalW(string psz1, string psz2);
    }

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

    sealed class Program
    {
        void run()
        {
            string[] filenames =
            {
                "0.jpeg",
                "1.jpeg",
                "10.jpeg",
                "11.jpeg",
                "2.jpeg",
                "20.jpeg",
                "21.jpeg"
            };

            Array.Sort(filenames); // Sorts in the wrong order.

            foreach (var filename in filenames)
                Console.WriteLine(filename);

            Console.WriteLine("\n");

            Array.Sort(filenames, new NaturalStringComparer()); // Sorts correctly.

            foreach (var filename in filenames)
                Console.WriteLine(filename);
        }

        static void Main(string[] args)
        {
            new Program().run();
        }
    }
}

NOTE: This example is based on code from this original answer.