Is there a simple way to display the files in a folder to a CSV that shows whether the files in that folder are JPG, PDF, or other using C#?

CodePudding user response：

There is no built-in way to do this in C#, but you can use the System.IO.Directory and System.IO.File classes to get a list of files in a directory and then check their extensions to see if they are JPG, PDF, or other.

using System;
using System.IO;

class Program
{
    static void Main(string[] args)
    {
        string directory = "C:\\";
        string[] files = Directory.GetFiles(directory);
        using (StreamWriter writer = new StreamWriter("files.csv"))
        {
            foreach (string file in files)
            {
                string extension = Path.GetExtension(file);
                writer.WriteLine("{0},{1}", file, extension);
            }
        }
    }
}

CodePudding user response：

You can use Matcher to traverse a folder structure using wild cards to getting specific file types and exclusions also.

Example method

public static async Task Demo(string parentFolder, string[] patterns, string[] excludePatterns, string fileName)
{

    StringBuilder builder = new StringBuilder();
    
    Matcher matcher = new();
    matcher.AddIncludePatterns(patterns);
    matcher.AddExcludePatterns(excludePatterns);

    await Task.Run(() =>
    {

        foreach (string file in matcher.GetResultsInFullPath(parentFolder))
        {
            builder.AppendLine(file);
        }
    });

    await File.WriteAllTextAsync("TODO", builder.ToString());

}

Example call, find all png and pdf files but exclude some specified in the exclude array which is explained in the docs.

string[] include = { "**/*.png", "**/*.pdf" };
string[] exclude = { "**/*in*.png", "**/*or*.png" };
await GlobbingOperations.Demo(
    "Parent folder", 
    include, 
    exclude, 
    "Dump.txt");

When traversing files add any other logic to get specifics about a file and use that to add to the builder variable for writing to a file.