文件名排序

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace ConsoleApp1 {
    class Program {


        /*
         * 思路1：把文件名转换成int类型，字符串类型的替换掉，排好序后再 添加进来
         */
        public static string[] SortDirectoryFiles(string path) {
            string[] files = Directory.GetFiles(path);
            int[] intFiles = new int[files.Length];
            string fileExtension = ""; //文件扩展名

            //转换成int[]
            for (int i = 0; i < files.Length; i++) {
                fileExtension = Path.GetExtension(files[i]);
                intFiles[i] = Convert.ToInt32(files[i].Replace(path + "\\","").Replace(fileExtension,""));
            }

            //int类型排序
            Array.Sort(intFiles);

            //添加少的部分
            string[] result = new string[files.Length];
            for (int i = 0; i < files.Length; i++) {
                result[i] = intFiles[i] + fileExtension;
            }

            return result;
        }


        static void Main(string[] args) {
            string path = @"D:\Administrator\Images\安全员A证 2020-8-31\a\单选题\3";

            string[] arr = SortDirectoryFiles(path);
            foreach (var item in arr) {
                Console.WriteLine(item);
            }

        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApp1 {
    class Program {
        static void Main(string[] args) {


            string[] files = { "test1.jpg","test10.jpg","test2.jpg","test3.jpg","test20.jpg","test11.jpg","test5.jpg","test51.jpg" };

            foreach (var item in files) {
                Console.WriteLine(item);
            }
        }
    }
}

结果是这样的

test1.jpg

test10.jpg

test2.jpg

test3.jpg

test20.jpg

test11.jpg

test5.jpg

test51.jpg

我想这样的结果,按整数类型的排序结果

test1.jpg

test2.jpg

test3.jpg

test5.jpg

test10.jpg

test11.jpg

test20.jpg

test51.jpg