.net用C#编写一个media播放器

这个是仿照《Visual C＃ 2005 入门与提高》中的代码写的.

其实还支持wma等wmplayer支持的格式.(因为解码器是调用的mediaplayer控件).

界面:

代码如下;

 

//http://blog.csdn.net/greenerycn
//请遵守署名非商业的CC版权.
//[e-mail]
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Runtime.InteropServices;

namespace MyMediaPlayer
......{
    
    public partial class Form1 : Form
    ......{
        [DllImport ("winmm.dll")]
    public static extern int waveOutGetNumDevs(string lpszName,int hModule,int dwFlags);     //need for the WinAPI
        /**//**//**//// <summary>
        /// 歌曲列表
        /// </summary>
        private string[] playlist = new string[500];
        /**//**//**//// <summary>
        /// 歌曲数
        /// </summary>
        private int numofMusic;
        /**//**//**//// <summary>
        /// 添加文件
        /// </summary>
        /// <param name="path">文件路径</param>
        public void AddFile(string path)
        ......{
            if (numofMusic < 500)
            ......{
                numofMusic++;
                playlist[numofMusic] = path;
            }
        }
        /**//**//**//// <summary>
        /// 删除文件
        /// </summary>
        /// <param name="selectNum">删除文件名</param>
        public void DelFile(int selectNum)
        ......{
            for (int i = selectNum; i <= numofMusic - 1; i++)
                playlist[i] = playlist[i + 1];
            numofMusic--;
        }
        public void PlaySong(int selectNum)
        ......{
            MediaPlayer1.URL = playlist[selectNum];
        }

        public void AddDir(string path, ListBox listBox1)
        ......{
            DirectoryInfo dir = new DirectoryInfo(path);
            foreach (FileInfo f in dir.GetFiles("*.mp3"))
            ......{
                AddFile(f.FullName);
                string strTmp = Convert.ToString(numofMusic);
                for (int i = 1; i < (5 - strTmp.Length); i++)
                    strTmp += ' ';
                strTmp += "- " + f.Name;
                this.listBox1.Items.Add(strTmp);
            }
            foreach (DirectoryInfo f in dir.GetDirectories())
            ......{
                AddDir(f.FullName, listBox1);
            }
        }

        public Form1()
        ......{
            InitializeComponent();
        }


        private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        ......{

            try
            ......{
                linkLabel1.LinkVisited = true;
                System.Diagnostics.Process.Start("http://blog.csdn.net/greenerycn");
            }
            catch
            ......{
                MessageBox.Show("Unable to open link that was clicked.");
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        ......{
            listBox1.Items.CopyTo(playlist,0);
            numofMusic=0;
        }
        /**//**//**//// <summary>
        /// 播放
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        ......{
            int selectOne;
            if (listBox1.SelectedIndex < 0)
            ......{
                selectOne = 1;
                listBox1.SelectedIndex = 0;
            }
            else
                selectOne = listBox1.SelectedIndex + 1;
            if (listBox1.Items.Count<0)
                listBox1.SelectedIndex=0;
            PlaySong(selectOne);
        }

        private void button2_Click(object sender, EventArgs e)
        ......{
            if (this.openFileDialog1.ShowDialog()==DialogResult.OK)
            ......{
                string path=this.openFileDialog1.FileName;
                FileInfo f=new FileInfo(path);
                AddFile(f.FullName);
                string strTmp=Convert.ToString(numofMusic);
                for (int i=1;i<(5-strTmp.Length);i++)
                    strTmp+= ' ';
                strTmp+="- "+f.Name;
                this.listBox1.Items.Add(strTmp);
            }
        }

        private void button3_Click(object sender, EventArgs e)
        ......{
            folderBrowserDialog1.SelectedPath="C:";
            folderBrowserDialog1.ShowNewFolderButton=true;
            folderBrowserDialog1.Description="请选择音乐文件目录";
            folderBrowserDialog1.ShowDialog();
            AddDir(folderBrowserDialog1.SelectedPath,listBox1);
        }

        private void button4_Click(object sender, EventArgs e)
        ......{
            if (listBox1.SelectedIndex>=0)
            ......{
                DelFile(listBox1.SelectedIndex+1);
                listBox1.Items.Remove(listBox1.SelectedIndex);
            }
        }

        private void button5_Click(object sender, EventArgs e)
        ......{
            if (listBox1.SelectedIndex>=0)
            ......{
                listBox1.SelectedIndex--;
                if (listBox1.SelectedIndex<0)
                    listBox1.SelectedIndex=numofMusic-1;
                PlaySong(listBox1.SelectedIndex+1);
            }
        }
        /**//**//**//// <summary>
        /// 下一首
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button6_Click(object sender, EventArgs e)
        ......{
            if (listBox1.SelectedIndex<listBox1.Items.Count-1)
                listBox1.SelectedIndex++;
            else if (listBox1.Items.Count>0)
                    listBox1.SelectedIndex=0;
            PlaySong(listBox1.SelectedIndex+1);
        }

        private void button7_Click(object sender, EventArgs e)
        ......{
            MediaPlayer1.URL="";
        }

        private void listBox1_DoubleClick(object sender, EventArgs e)
        ......{
                        int selectOne;
            if (listBox1.SelectedIndex<0)
                selectOne=1;
            else
                selectOne=listBox1.SelectedIndex+1;
            if (listBox1.Items.Count<0)
                listBox1.SelectedIndex=0;
            PlaySong(selectOne);

        }
       //用winAPI检测声卡
        private void CheckSoundCard_Click(object sender, EventArgs e)
        ......{
            int i;
            i = waveOutGetNumDevs("", 0, 0);
            if (i > 0)
                MessageBox.Show("可以播放声音。", "声音检测", MessageBoxButtons.OK, MessageBoxIcon.Information);
            else
                MessageBox.Show("不可以播放声音。", "声音检测", MessageBoxButtons.OK, MessageBoxIcon.Information);

        }
    }
}