Question

我有两个文本文件output1和output2

output1包含以下内容：

USA
New Zealand
Switzerland
Nigeria
Australia
Brazil
Kenya
Mexico

output2包含

USA
Switzerland
Nigeria
Australia
Brazil
Mexico
China
Pakistan

然后我将同时检查output1和output2并将差异写入新的文本文件中

The file - New Zealand - is in output1 but not in output2
The file - Kenya - is in output1 but not in output2
The file - China - is in output2 but not in output1
The file - Pakistan - is in output2 but not in output1

这是我为第一个输出文件编写的代码，并为第二个输出文件重复了

 public void runCMD(string path1, string path2)
        {
        //path 1 should be the directory you are trying to get the files from.
        //path 2 should be the directory you want to save result.txt to.

            path2 = "C:/users/dan/desktop/";
            System.Diagnostics.Process process = new 
            System.Diagnostics.Process();
            System.Diagnostics.ProcessStartInfo startInfo = new
System.Diagnostics.ProcessStartInfo();
            startInfo.WindowStyle = 
    System.Diagnostics.ProcessWindowStyle.Hidden;
            startInfo.FileName = "cmd.exe";
            startInfo.Arguments = "/C dir /s/b " + path1 + " > C:/users/dan/desktop/result_0.txt";
            process.StartInfo = startInfo;
            process.Start();
            process.WaitForExit();

            //the goal here is to remove the path from every filename
            string line;
            System.IO.StreamWriter replace = new System.IO.StreamWriter(@"C:/users/dan/desktop/output1.txt");
            System.IO.StreamReader file = new System.IO.StreamReader(@"C:/users/dan/desktop/output_0.txt");
            while ((line = file.ReadLine()) != null)
            {


                //line = System.IO.Path.GetFileName(line);
                line = System.IO.Path.GetFileName(line);
                replace.WriteLine(System.IO.Path.GetFileName(line));
                //Console.WriteLine(line);
            }
            replace.Close();
            file.Close();
            File.Delete(@"C:/users/dan/desktop/output_0.txt");


        }

我的问题是如何比较两个文件？

Answer 1

您可以尝试使用File.ReadAllLines读取文件，然后使用HashSet获得与Enumerable.Except的区别：

public void FileDifference(string path1, string path2)
{
    var firstOutput = File.ReadAllLines(path1).ToHashSet();
    var secondOutput = File.ReadAllLines(path2).ToHashSet();

    foreach (var line in firstOutput.Except(secondOutput))
    {
        Console.WriteLine($"The file - {line} - is in output1 but not in output2");
    }

    foreach (var line in secondOutput.Except(firstOutput))
    {
        Console.WriteLine($"The file - {line} - is in output2 but not in output1");
    }
}

您可以这样打电话：

FileDifference(@"YOUR_PATH\output1.txt", @"YOUR_PATH\output2.txt");

输出：

The file - New Zealand - is in output1 but not in output2
The file - Kenya - is in output1 but not in output2
The file - China - is in output2 but not in output1
The file - Pakistan - is in output2 but not in output1

Answer 2

您应该尝试diff-match-patch from Google。这是csharp version。

如何比较两个相似的文本文件并在单独的文本文件中输出差异？

2 个答案: