WinForm复习---播放器

右键组件，选择选择项

点击COM组件，选择Windows Media Player

正文：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace _134_WinForm复习___播放器
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        bool b = true;
        /// <summary>
        /// 播放或者暂停
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnPlayorPause_Click(object sender, EventArgs e)
        {
            if (btnPlayorPause.Text == "播放")
            {
                if (b)
                {
                    //获得选中的歌曲的地址 
                    musicPlayer.URL = listPath[listBoxMusic.SelectedIndex];
                }
                musicPlayer.Ctlcontrols.play();
                btnPlayorPause.Text = "暂停";
            }
            else if (btnPlayorPause.Text == "暂停")
            {
                musicPlayer.Ctlcontrols.pause();
                btnPlayorPause.Text = "播放";
                b = false;
            }
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            //在程序加载的时候，取消播放器的自动播放功能
            musicPlayer.settings.autoStart = false;
            //musicPlayer.URL = @"C:\Users\46124\Desktop\.wav音乐\织风结.m4a";
            lblVolume.Text = musicPlayer.settings.volume.ToString();
        }
        private void tbnStop_Click(object sender, EventArgs e)
        {
            musicPlayer.Ctlcontrols.stop();
        }
        //存储音乐文件的全路径
        List<string> listPath = new List<string>();
        /// <summary>
        /// 打开对话框，选择音乐
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnChooseMusic_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.InitialDirectory = @"C:\Users\46124\Desktop\.wav音乐";
            ofd.Title = "客官，请选择你要听的音乐";
            ofd.Filter = "WAV文件|*.wav|M4A文件|*.m4a|MP3文件|*.mp3|MP4文件|*.mp4|所有文件|*.*";
            ofd.Multiselect = true;
            ofd.ShowDialog();
            //获得在文本框中选择文件的全路径
            string[] path = ofd.FileNames;
            for (int i = 0; i < path.Length; i++)
            {
                //将获得在文本框中选择文件的全路径储存到泛型集合中
                listPath.Add(path[i]);
                //将音乐文件的文件名储存到ListBox中
                listBoxMusic.Items.Add(Path.GetFileName(path[i]));
            }
        }
        /// <summary>
        /// 双击播放音乐
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void listBoxMusic_DoubleClick(object sender, EventArgs e)
        {
            if (listBoxMusic.Items.Count == 0)
            {
                MessageBox.Show("请选择音乐文件！");
                return;
            }
            try
            {
                musicPlayer.URL = listPath[listBoxMusic.SelectedIndex];
                musicPlayer.Ctlcontrols.play();
                btnPlayorPause.Text = "暂停";
            }
            catch { }
        }
        /// <summary>
        /// 点击下一曲
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnNext_Click(object sender, EventArgs e)
        {
            try
            {
                //获得当前项的索引
                int index = listBoxMusic.SelectedIndex;
                //清空所有选中项的索引(因为将listBox设置为了多选需要这样操作
                listBoxMusic.SelectedIndices.Clear();
                index++;
                if (index == listBoxMusic.Items.Count)
                {
                    index = 0;
                }
                //将改变后的索引重新赋值给当前选中项的索引（改变蓝条）
                listBoxMusic.SelectedIndex = index;
                //播放下一曲
                musicPlayer.URL = listPath[index];
                musicPlayer.Ctlcontrols.play();
                btnPlayorPause.Text = "暂停";
            }
            catch
            { MessageBox.Show("请选择文件！"); }
        }
        /// <summary>
        /// 点击上一曲
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnLast_Click(object sender, EventArgs e)
        {
            try
            {
                //获得当前项的索引
                int index = listBoxMusic.SelectedIndex;
                //清空所有选中项的索引(因为将listBox设置为了多选需要这样操作
                listBoxMusic.SelectedIndices.Clear();
                index--;
                if (index == -1)
                {
                    index = listBoxMusic.Items.Count - 1;
                }
                //将改变后的索引重新赋值给当前选中项的索引（改变蓝条）
                listBoxMusic.SelectedIndex = index;
                //播放上一曲
                musicPlayer.URL = listPath[index];
                musicPlayer.Ctlcontrols.play();
                btnPlayorPause.Text = "暂停";
            }
            catch { MessageBox.Show("请选择文件！"); }
        }
        /// <summary>
        /// 点击删除 选中项
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void 删除ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //先删集合还是删列表
            //首先获得要删除歌曲的数量
            int count = listBoxMusic.SelectedItems.Count;
            for (int i = 0; i < count; i++)
            {
                //先删集合
                listPath.RemoveAt(listBoxMusic.SelectedIndex);
                //再删列表
                listBoxMusic.Items.RemoveAt(listBoxMusic.SelectedIndex);
            }
            //如果先删除列表，那么listBoxMusic.SelectedIndex就会发生变化，集合会按照这发生的listBoxMusic.SelectedIndex去进行删除，就会报错。
        }
        /// <summary>
        /// 减小音量
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            musicPlayer.settings.volume -= 5;
            lblVolume.Text = musicPlayer.settings.volume.ToString();
        }
        /// <summary>
        /// 放大音量
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e)
        {
            musicPlayer.settings.volume += 5;
            lblVolume.Text = musicPlayer.settings.volume.ToString();
        }
        /// <summary>
        /// 点击静音
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnMute_Click(object sender, EventArgs e)
        {
            musicPlayer.settings.mute = true;
        }
        private void timer1_Tick(object sender, EventArgs e)
        {
            //如果播放器的状态等于正在播放中
            if (musicPlayer.playState == WMPLib.WMPPlayState.wmppsPlaying)
            {
                lblInfomation.Text = musicPlayer.currentMedia.duration.ToString() + "\r\n"
                    + musicPlayer.currentMedia.durationString + "\r\n"
                    + musicPlayer.Ctlcontrols.currentPosition.ToString() + "\r\n"
                    + musicPlayer.Ctlcontrols.currentPositionString;
                //比较总时间和当前播放时间
                if (musicPlayer.currentMedia.duration <= musicPlayer.Ctlcontrols.currentPosition + 1)
                {
                    //下一曲
                    btnNext_Click(sender, e);
                }
            }
            //if (musicPlayer.playState== WMPLib.WMPPlayState.wmppsReady)
            //{
            //    musicPlayer.Ctlcontrols.play();
            //}
            //if (musicPlayer.playState!= WMPLib.WMPPlayState.wmppsPlaying)
            //{
            //    //下一曲
            //      btnNext_Click(sender, e);
            //}
        }
    }
}

//先删集合还是删列表
//如果先删除列表，那么listBoxMusic.SelectedIndex就会发生变化，集合会按照这发生的listBoxMusic.SelectedIndex去进行删除，就会报错。

用label实现静\放音