Csharp: play media file using Windows Media Player

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using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using WMPLib;//引用Windows MediaPlay COM組件 using AxWMPLib; //在選項卡裏添加 Windows MediaPlay COM組件   namespace WindowsChineseCalender {     /// <summary>     /// 塗聚文 20121222     /// Geovin Du     /// </summary>     public partial class WindowMediaPlayForm : Form     {        // AxWMPLib.AxWindowsMediaPlayer wmp = new AxWMPLib.AxWindowsMediaPlayer();        //this.Controls.Add(wmp);         WMPLib.WindowsMediaPlayerClass player=new WMPLib.WindowsMediaPlayerClass();         WMPLib.WindowsMediaPlayer Player;         double d1;         double d2;         /// <summary>         ///         /// </summary>         public WindowMediaPlayForm()         {             InitializeComponent();         }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void WindowMediaPlayForm_Load(object sender, EventArgs e)         {             player.URL = "";               this.axWindowsMediaPlayer1.settings.autoStart = false;                     //設定不自動撥放             this.tbarVolume.Minimum = 0;                                               //設定音量調整Bar最小值為最小音量值(0)             this.tbarVolume.Maximum = 100;                                             //設定音量調整Bar最大值為最大音量值(100)             this.tbarVolume.Value = this.axWindowsMediaPlayer1.settings.volume;        //設定音量調整Bar目前值為目前音量值             this.timer1.Enabled = true;             }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void btnupload_Click(object sender, EventArgs e)         {             OpenFileDialog openFileDialog = new OpenFileDialog();             openFileDialog.ShowDialog();             openFileDialog1.Title = "Select video file..";             openFileDialog1.InitialDirectory = Application.StartupPath;             openFileDialog1.DefaultExt = ".avi";             openFileDialog.Filter = "Media Files|*.mpg;*.avi;*.wma;*.mov;*.wav;*.mp2;*.mp3|All Files|*.*";             //vdo = new Video(openFileDialog.FileName);             //player.URL = openFileDialog.FileName;             //this.Controls.Add(player):             axWindowsMediaPlayer1.URL = openFileDialog.FileName;               this.Controls.Add(axWindowsMediaPlayer1);             axWindowsMediaPlayer1.Ctlcontrols.play();             d2 = axWindowsMediaPlayer1.currentMedia.duration;             d1 = axWindowsMediaPlayer1.Ctlcontrols.currentPosition;             this.textBox1.Text = d2.ToString() + "/" + d1.ToString();               }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void openFileDialog1_FileOk(object sender, CancelEventArgs e)         {           }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void btnPlay_Click(object sender, EventArgs e)         {            // player.controls.play();             //player.enableContextMenu = true;//启用/禁用右键菜单             axWindowsMediaPlayer1.Ctlcontrols.play();         }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void btnStop_Click(object sender, EventArgs e)         {             //player.controls.stop();             axWindowsMediaPlayer1.Ctlcontrols.stop();         }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void buttonFull_Click(object sender, EventArgs e)         {             //player.fullScreen = true;             axWindowsMediaPlayer1.fullScreen=true;         }         /// <summary>         ///         /// </summary>         /// <param name="url"></param>         private void PlayFile(String url)         {             Player = new WMPLib.WindowsMediaPlayer();             Player.PlayStateChange +=                 new WMPLib._WMPOCXEvents_PlayStateChangeEventHandler(Player_PlayStateChange);             Player.MediaError +=                 new WMPLib._WMPOCXEvents_MediaErrorEventHandler(Player_MediaError);             Player.URL = url;             Player.controls.play();         }         /// <summary>         ///         /// </summary>         /// <param name="NewState"></param>         private void Player_PlayStateChange(int NewState)         {             if ((WMPLib.WMPPlayState)NewState == WMPLib.WMPPlayState.wmppsStopped)             {                 this.Close();             }         }         /// <summary>         ///         /// </summary>         /// <param name="pMediaObject"></param>         private void Player_MediaError(object pMediaObject)         {             MessageBox.Show("Cannot play media file.");             this.Close();         }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void tbarVolume_RightToLeftLayoutChanged(object sender, EventArgs e)         {             this.axWindowsMediaPlayer1.settings.volume = this.tbarVolume.Value;      //改變音量大小         }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void tbarPlayLoaction_Scroll(object sender, EventArgs e)         {             this.axWindowsMediaPlayer1.Ctlcontrols.currentPosition = tbarPlayLoaction.Value;          //改變撥放位置         }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void btnIncreaseVolume_Click(object sender, EventArgs e)         {             this.axWindowsMediaPlayer1.settings.volume += 1;       //音量大小+1         }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void btnDecreaseVolume_Click(object sender, EventArgs e)         {             this.axWindowsMediaPlayer1.settings.volume -= 1;       //音量大小-1         }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void timer1_Tick(object sender, EventArgs e)         {             if (this.axWindowsMediaPlayer1.currentMedia == null)                 return;             this.tbarPlayLoaction.Maximum = (int)this.axWindowsMediaPlayer1.currentMedia.duration;          //設定撥放位置調整Bar最大值             d2 = axWindowsMediaPlayer1.currentMedia.duration;             d1 = axWindowsMediaPlayer1.Ctlcontrols.currentPosition;             this.textBox1.Text = CalculateTime(d2) + "/" + CalculateTime(d1);         }         /// <summary>         ///         /// </summary>         /// <param name="Time"></param>         /// <returns></returns>         public string CalculateTime(double Time)         {             string mm, ss, CalculatedTime;             int h, m, s, T;               Time = Math.Round(Time);             T = Convert.ToInt32(Time);               h = (T / 3600);             T = T % 3600;             m = (T / 60);             s = T % 60;               if (m < 10)                 mm = string.Format("0{0}", m);             else                 mm = m.ToString();             if (s < 10)                 ss = string.Format("0{0}", s);             else                 ss = s.ToString();               CalculatedTime = string.Format("{0}:{1}:{2}", h, mm, ss);               return CalculatedTime;         }     } }