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   源码介绍

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一个简单易上手的多媒体播放器

  public partial class frmMain : Form
    {
        public string initialFileName = string.Empty;//传入的参数
        public int playState = 1;//播放状态
        public string defaultExeName = "mp3";//默认文件类型

        public frmMain()
        {
            InitializeComponent();
        }
        public frmMain(string fileName)
        {
            InitializeComponent();
            this.initialFileName = fileName;
        }

        private void frmMain_Load(object sender, EventArgs e)
        {
            InitialPlayList();
            GetDefaultExeName();
            GetState();
            if (this.initialFileName!=string.Empty)
            {
                addFileName(this.initialFileName);
            }
        }
        /// <summary>
        /// 初始化、从文件读取
        /// </summary>
        public void InitialPlayList()
        {
            if (!File.Exists("config/PlayList.popMusic"))
            {
                return;
            }
            this.tvList.Nodes[0].Nodes.Clear();
            FileStream fs = new FileStream("config/PlayList.popMusic", FileMode.OpenOrCreate);
            StreamReader sr = new StreamReader(fs);
            string fileName = sr.ReadLine();
            //从文本中读取
            while (fileName != null)
            {
                int index = fileName.LastIndexOf(@"\");
                string exeName = fileName.Substring(index 1);
                AddTreeNode(fileName, exeName);
                fileName = sr.ReadLine();
            }
            sr.Close();
            fs.Close();
            this.tvList.Nodes[0].ExpandAll();
        }
        /// <summary>
        /// 保存播放列表
        /// </summary>
        public void SaveList()
        {
            FileStream fs = new FileStream("config/PlayList.popMusic", FileMode.Create);
            StreamWriter sw = new StreamWriter(fs);
            foreach (TreeNode tn in this.tvList.Nodes[0].Nodes)
            {
                sw.WriteLine(tn.Tag.ToString());
            }
            sw.Close();
            fs.Close();
        }
        /// <summary>
        /// 设置默认文件类型
        /// </summary>
        /// <param name="op"></param>
        public void SaveDefaultExeName()
        {
            FileStream fs = new FileStream("config/DefaultExeName.popMusic", FileMode.Create);
            StreamWriter sw = new StreamWriter(fs);
            sw.WriteLine(this.defaultExeName.ToLower());
            sw.Close();
            fs.Close();
        }
        /// <summary>
        /// 获得默认文件类型
        /// </summary>
        /// <returns></returns>
        public void GetDefaultExeName()
        {
            if (!File.Exists("config/DefaultExeName.popMusic"))
            {
                return;
            }
            FileStream fs = new FileStream("config/DefaultExeName.popMusic", FileMode.OpenOrCreate);
            StreamReader sr = new StreamReader(fs);
            this.defaultExeName = sr.ReadLine().ToLower();
            sr.Close();
            fs.Close();
            if (this.defaultExeName == "mp3")
            {
                this.ofd.Filter = "音频文件|*.mp3|视频文件|*.mp4";
                this.ofd.DefaultExt = "mp3";
            }
            else
            {
                this.ofd.Filter = "视频文件|*.mp4|音频文件|*.mp3";
                this.ofd.DefaultExt = "mp4";
            }
        }
        /// <summary>
        /// 设置播放状态
        /// </summary>
        /// <param name="op"></param>
        public void SaveState()
        {
            FileStream fs = new FileStream("config/State.popMusic", FileMode.Create);
            StreamWriter sw = new StreamWriter(fs);
            sw.WriteLine(this.playState);
            sw.Close();
            fs.Close();
        }
        /// <summary>
        /// 获得播放状态
        /// </summary>
        /// <returns></returns>
        public void GetState()
        {
            if (!File.Exists("config/State.popMusic"))
            {
                return;
            }
            FileStream fs = new FileStream("config/State.popMusic", FileMode.OpenOrCreate);
            StreamReader sr = new StreamReader(fs);
            this.playState = int.Parse(sr.ReadLine());
            sr.Close();
            fs.Close();
        }
        /// <summary>
        /// 打开文件播放
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void 打开文件ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (this.ofd.ShowDialog() == DialogResult.Cancel)
            {
                return;
            }
            string fileName = this.ofd.FileName;
            addFileName(fileName);
            int index = fileName.LastIndexOf(@".");
            string exeName = fileName.Substring(index 1);
            this.defaultExeName = exeName.ToLower();
        }

        public void addFileName(string fileName)
        {
            int index = fileName.LastIndexOf(@"\");
            string exeName = fileName.Substring(index 1);
            //如果播放列表已经有这个文件,就选中列表里的项
            foreach (TreeNode t in this.tvList.Nodes[0].Nodes)
            {
                string name = t.Text;
                if (name.Contains(exeName))
                {
                    this.tvList.SelectedNode = t;
                    play();
                    return;
                }
            }
            TreeNode tn = AddTreeNode(fileName, exeName);
            this.tvList.Nodes[0].ExpandAll();
            this.tvList.SelectedNode = tn;
            play();
        }

        /// <summary>
        /// 添加一个节点
        /// </summary>
        /// <param name="fileName"></param>
        /// <param name="exeName"></param>
        public TreeNode AddTreeNode(string fileName,string exeName) 
        {
            int count = this.tvList.Nodes[0].Nodes.Count 1;
            string showCount = count.ToString();
            if (count < 10) 
            {
                showCount = "0" count;
            }
            TreeNode tn = new TreeNode(showCount " " exeName);
            tn.Tag = fileName;
            tn.ToolTipText = exeName;
            this.tvList.Nodes[0].Nodes.Add(tn);
            return tn;
        }
        private void cms_Opening(object sender, CancelEventArgs e)
        {
if (this.tvList.Nodes[0].Nodes.Count<1)
{
this.下载ToolStripMenuItem.Enabled = false;
                this.删除ToolStripMenuItem.Enabled = false;
this.清空播放列表ToolStripMenuItem.Enabled = false;
return;
}
else
{
this.下载ToolStripMenuItem.Enabled = true;
this.删除ToolStripMenuItem.Enabled = true;
this.清空播放列表ToolStripMenuItem.Enabled = true;
}
//再次判断
if (this.tvList.SelectedNode == null || this.tvList.SelectedNode.Level == 0)
            {
                this.下载ToolStripMenuItem.Enabled = false;
                this.删除ToolStripMenuItem.Enabled = false;
            }
            else 
            {
                this.下载ToolStripMenuItem.Enabled = true;
                this.删除ToolStripMenuItem.Enabled = true;
            }
        }
        private void 下载ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (this.fbd.ShowDialog() == DialogResult.Cancel)
            {
                return;
            }
            string fileName = this.tvList.SelectedNode.Tag.ToString();
            int index = fileName.LastIndexOf(@"\");
            string exeName = fileName.Substring(index 1);
            string toName = this.fbd.SelectedPath "\\" exeName;
            File.Copy(fileName, toName);
            MessageBox.Show("下载" exeName "成功!", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }
        private void 删除ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            TreeNode tn = this.tvList.SelectedNode;
            this.tvList.Nodes[0].Nodes[tn.Index].Remove();
            //说明列表里还有
            if (tvList.Nodes[0].Nodes.Count > 0)
            {
                SaveList();
                InitialPlayList();
                //如果当前是最后一项
                if (tvList.SelectedNode.Index == tvList.Nodes[0].Nodes.Count - 1)
                {
                    this.tvList.SelectedNode = tvList.Nodes[0].Nodes[0];
                }
                //不是最后一项
                else
                {
                    this.tvList.SelectedNode = tvList.Nodes[0].Nodes[tvList.SelectedNode.Index 1];
                }
                play();
            }
            else
            {
                this.mediaPlay.URL = "";
            }
        }