SoundPlayer的使用示例

    开发一个简易的音乐播放器。实现选择音乐文件，双击播放，上一曲，下一曲等功能。

using System;
using System.Collections.Generic;
using System.IO;
using System.Media;
using System.Windows.Forms;

namespace WindowsFormsApp3
{
    public partial class Form1 : Form
    {
        List songs = new List();
        SoundPlayer song = new SoundPlayer();

        public Form1()
        {
            InitializeComponent();
        }

        //载入文件
        private void button1_Click(object sender, EventArgs e)
        {
            songs.Clear();
            listBox1.Items.Clear();

            OpenFileDialog openFile = new OpenFileDialog();
            openFile.InitialDirectory = @"E:\test";
            openFile.Multiselect = true;
            openFile.ShowDialog();

            string[] selectFiles = openFile.FileNames;           
            songs.AddRange(selectFiles);

            for (int i = 0; i < selectFiles.Length; i++)
            {
                listBox1.Items.Add(Path.GetFileName(selectFiles[i]));
            }
        }

        //双击播放
        private void listBox1_DoubleClick(object sender, EventArgs e)
        {
            song.SoundLocation = songs[listBox1.SelectedIndex];
            song.Play();
        }

        //上一曲
        private void button2_Click(object sender, EventArgs e)
        {
            int count = songs.Count;
            if (listBox1.SelectedIndex == 0)
                listBox1.SelectedIndex = count - 1;
            else
                listBox1.SelectedIndex = (listBox1.SelectedIndex - 1)% count;
      
            song.SoundLocation = songs[listBox1.SelectedIndex];
            song.Play();

        }

        //下一曲
        private void button3_Click(object sender, EventArgs e)
        {
            int count = songs.Count;
            listBox1.SelectedIndex = (listBox1.SelectedIndex + 1) % count;
            song.SoundLocation = songs[listBox1.SelectedIndex];
            song.Play();
        }
    }
}

运行结果：