How to Play an Mp3 File in a Windows Form Application in C#

1. Use C# Windows Form Application to Create a Simple Mp3 Player
2. Use DirectShow Functionality to Create an Mp3 Windows Form Application in C#

This post will demonstrate how to build a simple C# mp3 player using your C# Windows form application and a Windows Media Player.

Use C# Windows Form Application to Create a Simple Mp3 Player

First, we’ll create a new Windows form by following these steps.

Now, we’ll design the form.

After creating the Windows form, we’ll design it. If you don’t have the Windows Media Player items in your Toolbox, follow these steps.

Adding Items:

We can create an MP3 Player Windows form by following these particular steps.

Libraries that are required:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

Firstly, initialize two string array-type global variables named file and filepath.

string[] file, filepath;

Now create an OpenFileDialog type variable named fileOpen, which will be used to launch a dialogue box for selecting files from the storage.

OpenFileDialog fileOpen = new OpenFileDialog();

Then we’ll apply a condition and pass the following as parameters.

if (fileOpen.ShowDialog() == System.Windows.Forms.DialogResult.OK)

The file’s name will be saved in the file variable if this expression is true.

file = fileOpen.SafeFileNames;

Using the below command, store the whole path of the file in the path variable named filepath.

filepath = fileOpen.FileNames;

Then we’ll use a for loop to add audio files in ListBox.

for (int i = 0; i < file.Length; i++) {
  Audiolist.Items.Add(file[i]);
}

After that, generate a click event of ListBox by double-clicking on it.

private void Audiolist_SelectedIndexChanged(object sender, EventArgs e) {}

This code is then pasted into the Audiolist body. This code will transfer the list or the path to that file into your Windows Media Player, regardless of the name you give it in the ListBox.

private void Audiolist_SelectedIndexChanged(object sender, EventArgs e) {
  axWindowsMediaPlayer1.URL = filepath[Audiolist.SelectedIndex];
}

The source code for building a simple C# mp3 player using your C# Windows form application, and a Windows Media Player is below.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Mp3Player {
  public partial class Form1 : Form {
    string[] file, filepath;
    public Form1() {
      InitializeComponent();
    }
    private void ChooseButton_Click(object sender, EventArgs e) {
      OpenFileDialog fileOpen = new OpenFileDialog();
      if (fileOpen.ShowDialog() == System.Windows.Forms.DialogResult.OK) {
        file = fileOpen.SafeFileNames;
        filepath = fileOpen.FileNames;
        for (int i = 0; i < file.Length; i++) {
          Audiolist.Items.Add(file[i]);
        }
      }
    }
    private void Audiolist_SelectedIndexChanged(object sender, EventArgs e) {
      axWindowsMediaPlayer1.URL = filepath[Audiolist.SelectedIndex];
    }
  }
}

Use DirectShow Functionality to Create an Mp3 Windows Form Application in C#

Use DirectShow functionality to create an Mp3 Windows form application with a Windows Media Player.

Tlbimp transforms type definitions in a COM type library to comparable definitions in an executable assembly for a common language.

The output of Tlbimp.exe is a binary file (an assembly) with runtime metadata for the types declared in the original type library.

To create QuartzTypeLib.dll, follow these steps.

You can use this source code to create an Mp3 Windows form application.

using QuartzTypeLib;

public sealed class DirectShowPlayer {
  private FilgraphManager fgm;
  public void Play(string filepath) {
    FilgraphManager fgm = new FilgraphManager();
    fgm.RenderFile(filepath);
    fgm.Run();
  }
  public void Stop() {
    fgm?.Stop();
  }
}