C# 简单视频播放器源码

       /// <summary>
       
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.Run(new Form1());
        }

        private void menuItem2_Click(object sender, System.EventArgs e)
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();

            openFileDialog.Filter = "Media Files|*.mpg;*.avi;*.wma;*.mov;*.wav;*.mp2;*.mp3;*.mp4|All Files|*.*";

            if (DialogResult.OK == openFileDialog.ShowDialog())
            {
                CleanUp();

                m_objFilterGraph = new FilgraphManager();
                m_objFilterGraph.RenderFile(openFileDialog.FileName);

                m_objBasicAudio = m_objFilterGraph as IBasicAudio;
               
                try
                {
                    m_objVideoWindow = m_objFilterGraph as IVideoWindow;
                    m_objVideoWindow.Owner = (int) panel1.Handle;
                    m_objVideoWindow.WindowStyle = WS_CHILD | WS_CLIPCHILDREN;
                    m_objVideoWindow.SetWindowPosition(panel1.ClientRectangle.Left,
                        panel1.ClientRectangle.Top,
                        panel1.ClientRectangle.Width,
                        panel1.ClientRectangle.Height);
                }
                catch (Exception)
                {
                    m_objVideoWindow = null;
                }

                m_objMediaEvent = m_objFilterGraph as IMediaEvent;

                m_objMediaEventEx = m_objFilterGraph as IMediaEventEx;
                m_objMediaEventEx.SetNotifyWindow((int) this.Handle,WM_GRAPHNOTIFY, 0);

                m_objMediaPosition = m_objFilterGraph as IMediaPosition;

                m_objMediaControl = m_objFilterGraph as IMediaControl;

                this.Text = "DirectShow - [" openFileDialog.FileName "]";

                m_objMediaControl.Run();
                m_CurrentStatus = MediaStatus.Running;

                UpdateStatusBar();
                UpdateToolBar();
            }
        }

        private void CleanUp()
        {
            if (m_objMediaControl != null)
                m_objMediaControl.Stop();

            m_CurrentStatus = MediaStatus.Stopped;

            if (m_objMediaEventEx != null)
                m_objMediaEventEx.SetNotifyWindow(0, 0, 0);

            if (m_objVideoWindow != null)
            {
                m_objVideoWindow.Visible = 0;
                m_objVideoWindow.Owner = 0;
            }

            if (m_objMediaControl != null) m_objMediaControl = null;
            if (m_objMediaPosition != null) m_objMediaPosition = null;
            if (m_objMediaEventEx != null) m_objMediaEventEx = null;
            if (m_objMediaEvent != null) m_objMediaEvent = null;
            if (m_objVideoWindow != null) m_objVideoWindow = null;
            if (m_objBasicAudio != null) m_objBasicAudio = null;
            if (m_objFilterGraph != null) m_objFilterGraph = null;
        }

        private void menuItem4_Click(object sender, System.EventArgs e)
        {
            this.Close();
        }

        private void Form1_SizeChanged(object sender, System.EventArgs e)
        {
            if (m_objVideoWindow != null)
            {
                m_objVideoWindow.SetWindowPosition(panel1.ClientRectangle.Left,
                    panel1.ClientRectangle.Top,
                    panel1.ClientRectangle.Width,
                    panel1.ClientRectangle.Height);
            }
        }

        private void toolBar1_ButtonClick(object sender, System.Windows.Forms.ToolBarButtonClickEventArgs e)
        {
            switch(toolBar1.Buttons.IndexOf(e.Button))
            {
                case 0: m_objMediaControl.Run();
                        m_CurrentStatus = MediaStatus.Running;
                        break;

                case 1: m_objMediaControl.Pause();
                        m_CurrentStatus = MediaStatus.Paused;
                        break;

                case 2: m_objMediaControl.Stop();
                        m_objMediaPosition.CurrentPosition = 0;
                        m_CurrentStatus = MediaStatus.Stopped;
                        break;

                case 3:
                    m_objMediaControl.Stop();
                    m_objMediaPosition.CurrentPosition = 0;
                    m_CurrentStatus = MediaStatus.Stopped;
                    break;
            }
           
            UpdateStatusBar();
            UpdateToolBar();                       
        }

        protected override void WndProc( ref Message m)
        {
            if (m.Msg == WM_GRAPHNOTIFY)
            {
                int lEventCode;
                int lParam1, lParam2;

                while (true)
                {
                    try
                    {
                        m_objMediaEventEx.GetEvent(out lEventCode,
                            out lParam1,
                            out lParam2,
                            0);
 
                        m_objMediaEventEx.FreeEventParams(lEventCode, lParam1, lParam2);

                        if (lEventCode == EC_COMPLETE)
                        {
                            m_objMediaControl.Stop();
                            m_objMediaPosition.CurrentPosition = 0;
                            m_CurrentStatus = MediaStatus.Stopped;
                            UpdateStatusBar();
                            UpdateToolBar();
                        }
                    }
                    catch (Exception)
                    {
                        break;
                    }
                }
            }

            base.WndProc(ref m);
        }

        private void timer1_Tick(object sender, System.EventArgs e)
        {
            if (m_CurrentStatus == MediaStatus.Running)
            {
                UpdateStatusBar();
            }
        }

        private void UpdateStatusBar()
        {
            switch (m_CurrentStatus)
            {
                case MediaStatus.None   : statusBarPanel1.Text = "Stopped"; break;
                case MediaStatus.Paused : statusBarPanel1.Text = "Paused "; break;
                case MediaStatus.Running: statusBarPanel1.Text = "Running"; break;
                case MediaStatus.Stopped: statusBarPanel1.Text = "Stopped"; break;
            }

            if (m_objMediaPosition != null)
            {
                int s = (int) m_objMediaPosition.Duration;
                int h = s / 3600;
                int m = (s  - (h * 3600)) / 60;
                s = s - (h * 3600 m * 60);
               
                statusBarPanel2.Text = String.Format("{0:D2}:{1:D2}:{2:D2}", h, m, s);

                s = (int) m_objMediaPosition.CurrentPosition;
                h = s / 3600;
                m = (s  - (h * 3600)) / 60;
                s = s - (h * 3600 m * 60);
               
                statusBarPanel3.Text = String.Format("{0:D2}:{1:D2}:{2:D2}", h, m, s);
            }
            else
            {
                statusBarPanel2.Text = "00:00:00";
                statusBarPanel3.Text = "00:00:00";
            }
        }

        private void UpdateToolBar()
        {
            switch (m_CurrentStatus)
            {
                case MediaStatus.None   : toolBarButton1.Enabled = false;
                                          toolBarButton2.Enabled = false;
                                          toolBarButton3.Enabled = false;
                                          break;
                                         
                case MediaStatus.Paused : toolBarButton1.Enabled = true;
                                          toolBarButton2.Enabled = false;
                                          toolBarButton3.Enabled = true;
                                          break;
                                         
                case MediaStatus.Running: toolBarButton1.Enabled = false;
                                          toolBarButton2.Enabled = true;
                                          toolBarButton3.Enabled = true;
                                          break;
                                         
                case MediaStatus.Stopped: toolBarButton1.Enabled = true;
                                          toolBarButton2.Enabled = false;
                                          toolBarButton3.Enabled = false;
                                          break;
            }
        }

        private void menuItem5_Click(object sender, System.EventArgs e)
        {
            Form2 dlg = new Form2();
            dlg.ShowDialog();
        }
    }