(资料图)

文件比较平常都是用Beyond Compare，可以说离不开的神器，特别是针对代码比较这块，确实挺好用的。

不过Beyond Compare平常拿它主要是用来做代码比较，用来做一些大批量的二进制文件比较，其实有点不是很方便。

于是造轮子，重新写了一个简单的文件夹比较的小工具。

平常主要是拿来做一些Nuget包的比对，应用包版本的比较。

文件夹比较逻辑，采用迭代比较的方式：

using CgdataBase;using FolderCompare.Models;using System;using System.Collections.Generic;using System.Collections.ObjectModel;using System.Diagnostics;using System.Linq;using System.Text;using System.Threading.Tasks;namespace FolderCompare.Helpers{    public static class CompareHelper    {        public static void CompareDirectory(CgDirectoryInfo path1, CgDirectoryInfo path2)        {            if (path1.Children.IsNullOrEmpty())            {                if (path2.Children.IsNullOrEmpty())                {                    path1.Result = ECompareResult.匹配;                    path2.Result = ECompareResult.匹配;                }                else                {                    path1.Result = ECompareResult.空;                    path2.Result = ECompareResult.孤立;                    SetCompareResult(path2, ECompareResult.匹配);                }                return;            }            if (path2.Children.IsNullOrEmpty())            {                path1.Result = ECompareResult.孤立;                path2.Result = ECompareResult.空;                SetCompareResult(path1, ECompareResult.匹配);                return;            }            var dirList = new List();            var fileList = new List();            dirList.AddRange(path1.Children.Where(s => s.IsDirectory).Select(s => s.Name));            dirList.AddRange(path2.Children.Where(s => s.IsDirectory).Select(s => s.Name));            fileList.AddRange(path1.Children.Where(s => !s.IsDirectory).Select(s => s.Name));            fileList.AddRange(path2.Children.Where(s => !s.IsDirectory).Select(s => s.Name));            var index = 0;            if (dirList.HadItems())            {                var items = dirList.Distinct().ToList();                items.Sort();                foreach (var item in items)                {                    var dir1 = path1.Children.OfType().SingleOrDefault(s => s.Name == item);                    if (dir1 == null)                    {                        dir1 = new CgDirectoryInfo();                        dir1.Result = ECompareResult.空;                        path1.Children.Insert(index, dir1);                        var dir2 = path2.Children.OfType().Single(s => s.Name == item);                        dir2.Result = ECompareResult.孤立;                        var old = path2.Children.IndexOf(dir2);                        path2.Children.Move(old, index);                        SetCompareResult(dir2, ECompareResult.匹配);                    }                    else                    {                        var dir2 = path2.Children.OfType().SingleOrDefault(s => s.Name == item);                        if (dir2 == null)                        {                            dir2 = new CgDirectoryInfo();                            dir2.Result = ECompareResult.空;                            path2.Children.Insert(index, dir2);                            dir1.Result = ECompareResult.孤立;                            var old = path1.Children.IndexOf(dir1);                            path1.Children.Move(old, index);                            SetCompareResult(dir1, ECompareResult.匹配);                        }                        else                        {                            CompareDirectory(dir1, dir2);                            var old = path1.Children.IndexOf(dir1);                            path1.Children.Move(old, index);                            old = path2.Children.IndexOf(dir2);                            path2.Children.Move(old, index);                        }                        dir2.Index = index;                    }                    dir1.Index = index;                    index++;                }            }            if (fileList.HadItems())            {                var items = fileList.Distinct().ToList();                items.Sort();                foreach (var item in items)                {                    var file1 = path1.Children.OfType().SingleOrDefault(s => s.Name == item);                    if (file1 == null)                    {                        file1 = new CgFileInfo();                        file1.Result = ECompareResult.空;                        path1.Children.Insert(index, file1);                        var file2 = path2.Children.OfType().Single(s => s.Name == item);                        file2.Result = ECompareResult.孤立;                        var old = path2.Children.IndexOf(file2);                        path2.Children.Move(old, index);                    }                    else                    {                        var file2 = path2.Children.OfType().SingleOrDefault(s => s.Name == item);                        if (file2 == null)                        {                            file2 = new CgFileInfo();                            file2.Result = ECompareResult.空;                            path2.Children.Insert(index, file2);                            file1.Result = ECompareResult.孤立;                            var old = path1.Children.IndexOf(file1);                            path1.Children.Move(old, index);                        }                        else                        {                            CompareFile(file1, file2);                            var old = path1.Children.IndexOf(file1);                            path1.Children.Move(old, index);                            old = path2.Children.IndexOf(file2);                            path2.Children.Move(old, index);                        }                        file2.Index = index;                    }                    file1.Index = index;                    index++;                }            }            path1.Result = GetCompareResult(path1.Children);            path2.Result = GetCompareResult(path2.Children);        }        private static void CompareFile(CgFileSystemInfo info1, CgFileSystemInfo info2)        {            if (info1.Name.IsNullOrEmpty())            {                info1.Result = ECompareResult.空;                info2.Result = ECompareResult.孤立;                return;            }            if (info2.Name.IsNullOrEmpty())            {                info1.Result = ECompareResult.孤立;                info2.Result = ECompareResult.空;                return;            }            if (info1.Length == info2.Length && info1.LastWriteTime == info2.LastWriteTime)            {                info1.Result = ECompareResult.匹配;                info2.Result = ECompareResult.匹配;            }            else            {                if (info1.LastWriteTime > info2.LastWriteTime)                {                    info1.Result = ECompareResult.不匹配;                    info2.Result = ECompareResult.较旧的;                }                else                {                    info1.Result = ECompareResult.较旧的;                    info2.Result = ECompareResult.不匹配;                }            }        }        private static void SetCompareResult(CgDirectoryInfo info, ECompareResult result)        {            if (info.Children.HadItems())            {                foreach (var item in info.Children)                {                    if (item is CgDirectoryInfo dir)                    {                        dir.Result = result;                        SetCompareResult(dir, result);                    }                    else if (item is CgFileInfo file)                    {                        file.Result = result;                    }                }            }        }        public static ECompareResult GetCompareResult(ObservableCollection items)        {            if (items.IsNullOrEmpty())                return ECompareResult.空;            if (items.Any(s => s.Result == ECompareResult.不匹配 || s.Result == ECompareResult.较旧的))                return ECompareResult.不匹配;            if (items.Any(s => s.Result == ECompareResult.孤立))                return ECompareResult.孤立;            return ECompareResult.匹配;        }    }}

源码：https://gitee.com/wzwyc/FolderCompare