输出索引号并从文件中删除路径

Question

I wrote this code, it works but there are 2 features I'd like to implement and I can't find out how.

First: How to add an index number before each song so it looks like this:

1. Song1
2. Song2
3. Song3

Second: The output to file includes the path to the file. How do I remove it?

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] files = Directory.GetFiles("E:\\Music", "*", SearchOption.AllDirectories);   

            foreach (string file in files)
            {
                string FileName = Path.GetFileName(file);
                Console.WriteLine(FileName);
                System.IO.File.WriteAllLines("E:\\songs.txt", (files));             
            }          

            Console.WriteLine("Press any key to exit");
            Console.ReadLine();   

        }
    }
}

Answer 1

So, in order to only write the name of the songs and not the whole path, you'll have to use Path.GetFileNameWithoutExtensions .

To write the index before every song, you'll have to switch to a for loop (to work with the index).

Another problem is that you're writing to songs.txt for every song, which is bad. Here's a code to help you out:

string[] files = Directory.GetFiles(@"C:\Users\Admin\Music\Playlists", "*", SearchOption.AllDirectories);
StringBuilder sb = new StringBuilder();

for (int i = 0; i < files.Length; i++)
{
    sb.AppendLine($"{i + 1}. {Path.GetFileNameWithoutExtension(files[i])}");
    // Each line will be something like: Number. NameOfTheSong
}

// Only save to the file when everything is done
File.WriteAllText("E:\\songs.txt", sb.ToString());
Console.WriteLine("Press any key to exit");
Console.ReadLine();

Answer 2

First of all, I think that you have a problem with this line: System.IO.File.WriteAllLines("E:\\\\songs.txt", (files));

Because in every loop you are writting the file songs.txt

About the new features:

For getting the index, an easy way is to change the foreach loop by a for loop.

For getting the file name you can use Path.GetFileName() or Path.GetFileNameWithoutExtension()

I hope this can help you.