Media Player c# -'Index was outside the bounds of the array.' for listbox c#

Question

Hi, I have created a media player in C#. This is the code for open Audio:
This opens and adds the audio file name and path to a list box
private void OpenAudio()
{

            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Multiselect = true;
            if (ofd.ShowDialog() == DialogResult.OK)
            {
                axWindowsMediaPlayer1.Ctlcontrols.stop();
                file = ofd.SafeFileNames;
                paths = ofd.FileNames;
                for (int i = 0; i < file.Length; i++)
                {
                    this.Width = 883;
                    listBox1.Items.Add(file[i]);
                    listBox1.SelectedIndex = -1;
                }
            }
        }

Now this is the code when user double clicks an item:
private void listBox1_MouseDoubleClick(object sender, MouseEventArgs e)
{
button3.Visible = false;
button1.Visible = true;

                axWindowsMediaPlayer1.URL = paths[listBox1.SelectedIndex];

        }

This code actually works perfectly when I firstly import a file.
Meaning:
If I import a file without previously importing any other previous files into the listbox, it plays the audio smoothly.
But when I add another file, with files already present in the listbox and then double click that new added file/ listbox item,
It throws this exception: 'Index was outside the bounds of the array.'.
Please help

Answer 1

Try replacing 'paths = ofd.FileNames' with something like this:

paths = ( paths ?? Enumerable.Empty<string>( ) ).Concat( ofd.FileNames ).ToArray( );

Answer 2

Hello,

Try this:

        private List<String> Files = new List<string> { };
        private List<String> Paths = new List<string> { };

        private void OpenAudio()
        {

            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Multiselect = true;
            if (ofd.ShowDialog() == DialogResult.OK)
            {
                axWindowsMediaPlayer1.Ctlcontrols.stop();
                for (int i = 0; i < ofd.FileNames.Length; i++)
                {
                    this.Width = 883;
                    Files.Add(System.IO.Path.GetFileNameWithoutExtension(ofd.FileNames[i]));
                    Paths.Add(ofd.FileNames[i]);

                    listBox1.Items.Add(Files[i]);
                    listBox1.SelectedIndex = -1;
                }
            }
        }
        private void listBox1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            button3.Visible = false;
            button1.Visible = true;
            axWindowsMediaPlayer1.URL = Paths[listBox1.SelectedIndex];
        }