Comparing files in a directory.

[TheDarklord]

I have some code which search for mp3 files and extracts that information for each file in each folder in a directory.

private void ShowFiles_Click(object sender, EventArgs e)
{

foreach (string foldername in Directory.GetDirectories(DirectoryName))
            {
                MP3Header mp3hdr = new MP3Header();
                string Mp3Filename;

               

                foreach (string filename in Directory.GetFiles(foldername))
                {
                    string extension = Path.GetExtension(filename);
                    FileInfo f = new FileInfo(filename);


                    if (extension == FileTypeExtension)
                    {
                        this.listBox1.Items.Add(filename);
                    }


                    if (f.Length <= thisFileLength)
                    {
                        this.listBox2.Items.Add(filename);

                    }

                    // Form1 tag = new Form1();

                    bool boolIsMP3 = mp3hdr.ReadMP3Information(filename);

                    this.listBoxFileName.Items.Add(mp3hdr.strFileName);
                    this.listBox3.Items.Add(mp3hdr.lngFileSize.ToString());
                    this.listBoxBitRate.Items.Add(mp3hdr.intBitRate.ToString());
                    this.listBoxFrequency.Items.Add(mp3hdr.intFrequency.ToString());
                    this.listBoxstrMode.Items.Add(mp3hdr.strMode);
                    this.listBoxstrLength.Items.Add(mp3hdr.strLengthFormatted);

                    Mp3Filename = filename;

                }

What would be the best way to extend this code so that it can compare files in one folder to a file in another folder, so for a duplicate finder?

[xlarsx]

Maybe you can create a List of PONOs and put all that info for each object in both directorys and when you find something that it's duplicated in the first List, you can add that object in other list.

References:
* http://ayende.com/Blog/archive/2007/...t-classes.aspx

[TheDarklord]

I tried adding a list called 'Filelist'.

List<string> Filelist = new List<string>();

Then trying to call a method 'CompareFile' in the foreach loop.

foreach (string foldername in Directory.GetDirectories(DirectoryName))
            {
                MP3Header mp3hdr = new MP3Header();
                string Mp3Filename;



                foreach (string filename in Directory.GetFiles(foldername))
                {
                    string extension = Path.GetExtension(filename);
                    FileInfo f = new FileInfo(filename);


                    if (extension == FileTypeExtension)
                    {
                        this.listBox1.Items.Add(filename);
                    }


                    if (f.Length <= thisFileLength)
                    {
                        this.listBox2.Items.Add(filename);

                    }

                    // Form1 tag = new Form1();

                    bool boolIsMP3 = mp3hdr.ReadMP3Information(filename);

                    this.listBoxFileName.Items.Add(mp3hdr.strFileName);
                    this.listBox3.Items.Add(mp3hdr.lngFileSize.ToString());
                    this.listBoxBitRate.Items.Add(mp3hdr.intBitRate.ToString());
                    this.listBoxFrequency.Items.Add(mp3hdr.intFrequency.ToString());
                    this.listBoxstrMode.Items.Add(mp3hdr.strMode);
                    this.listBoxstrLength.Items.Add(mp3hdr.strLengthFormatted);

                    Mp3Filename = filename;

                    Filelist.Add(mp3hdr.strFileName);

                    //this.listBox4.Items.Add(Filelist);
                    public void CompareFile(filename);

                }
            }

Then the method

public void String CompareFile(string mp3Filename)
                {
                foreach (string file in Filelist)
                {
                    if(string file= mp3Filename)
                    {
                    this.listBox4.Items.Add(file);
                    }
                }
                }

Then it's creating the error 'Expected class, delegate'enum'interface, or struct'.

Any suggestions?

[TheDarklord]

Does this method...

public void String CompareFile(string mp3Filename)
                {
                foreach (string file in Filelist)
                {
                    if(string file= mp3Filename)
                    {
                    this.listBox4.Items.Add(file);
                    }
                }
                }

need to be in the for loop or is it written incorrectly?