Determine file pairs in a directory, same name but different extensions

Question

I'm currently working on a .NET 2.0 application and I got stuck while trying to loop through all files in a specific folder and determine its file pairs. (Files with the same name but different extensions)

Like:

• MyFile0001.jpg
• MyFile0001.mp3
• MyFile0001.txt

I'm interested in the filename extension, if they are available or not, that's why I created a class called "FileClass". At the end the file pairs will be added to a list list.AddRange().

Her is my code example:

class FileClass
{
    public string FileName { get; set; }
    public string filePath { get; set; }
    public bool mp3 { get; set; }
    public bool txt { get; set; }
    public bool jpg { get; set; }
}

static void Main()
{
    var list = new List<FileClass>();

    var dirConfig = new DirectoryInfo(@"New Folder");
    var allFiles = dirConfig.GetFiles("*");

    foreach (var fileInfo in allFiles)
    {
        // Some code for finding file pairs...
        // set properties, if filename extension is available
        // and add them to a list. 
    }
}

Any suggestion how to handle this?
if possible without LINQ

Answer 1

I would use a Dictionary<String, List<String>> (for filename -> list of extensions)
The first step could look like this:

Dictionary<String, List<String>> d = new Dictionary<string, List<string>>();
var dirConfig = new DirectoryInfo(@"SomeFolder");
var allFiles = dirConfig.GetFiles("*");
foreach (var fileInfo in allFiles)
{
     String coreName = Path.GetFileNameWithoutExtension(fileInfo.Name);
     if (!d.ContainsKey(coreName)) d.Add(coreName, new List<String>());
     d[coreName].Add(fileInfo.Extension);
}