WPF 播放器

前台代码：

后台代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Microsoft.Win32;
using System.Windows.Media.Animation;
using System.Windows.Threading;

namespace MusicPlayer
{
    /// <summary>
    /// Window1.xaml 的交互逻辑
    /// </summary>
    public partial class Window1 : Window
    {
        OpenFileDialog openFile = new OpenFileDialog();
        private string videoName = "";
        private DispatcherTimer timer;
        public Window1()
        {
            InitializeComponent();
            this.timer = new DispatcherTimer();
        }

        /// <summary>
        /// 打开文件时设置进度条最大值
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void mdeMusic_MediaOpened(object sender, System.Windows.RoutedEventArgs e)
        {
            double seconds = mdeMusic.NaturalDuration.TimeSpan.TotalSeconds;
            sldProgress.Maximum = seconds / 10;
            sldProgress.Value = 0;

            //一个所代表的秒数
            double baseSecond = seconds / sldProgress.Maximum;
            this.timer.Interval = new TimeSpan(0, 0, 1);
            this.timer.Tick += new EventHandler(timer_Tick);
            this.timer.Start();
        }

        /// <summary>
        /// 播放结束时
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void mdeMusic_MediaEnded(object sender, RoutedEventArgs e)
        {
            btnPlay.Content = "Play";
            mdeMusic.Position = TimeSpan.Zero;
            mdeMusic.Pause();
        }

        private void btnPlay_Click(object sender, System.Windows.RoutedEventArgs e)
        {
            if (this.btnPlay.Content.ToString() == "Play")
            {
                this.btnPlay.Content = "Pause";
                mdeMusic.Play();
                txtMusicName.Text = "正在播放：" + openFile.SafeFileName;
                InitializePropertyValues();
            }
            else
            {
                mdeMusic.Pause();
                txtMusicName.Text = "已暂停：" + openFile.SafeFileName;
                this.btnPlay.Content = "Play";
            }
        }

        /// <summary>
        ///
        /// </summary>
        public void UserControl1()
        {
            InitializeComponent();
            Timeline.DesiredFrameRateProperty.OverrideMetadata(
            typeof(Timeline),
            new FrameworkPropertyMetadata
            {
                DefaultValue = 20
            });
        }

        private void btnStop_Click(object sender, System.Windows.RoutedEventArgs e)
        {
            mdeMusic.Position = TimeSpan.Zero;
            this.txtMusicName.Text = "";
            btnPlay.Content = "Play";
            mdeMusic.Stop();
        }
        /// <summary>
        /// 打开音乐
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnOpen_Click(object sender, System.Windows.RoutedEventArgs e)
        {
            openFile.Filter = "All Files(*.*)|*.*";
            openFile.InitialDirectory = "F:\\films";
            openFile.ShowDialog(this);
            videoName = openFile.FileName;
            if ((videoName != null) && (videoName != ""))
            {
                Uri file = new Uri(videoName);
                mdeMusic.Source = file;
                mdeMusic.LoadedBehavior = MediaState.Manual;
                mdeMusic.Play();
            }
        }

        void InitializePropertyValues()
        {
            mdeMusic.Volume = (double)sldVolumn.Value;
        }

        private void sldProgress_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
        {
            TimeSpan span = new TimeSpan(0, 0, (int)(sldProgress.Value) * 10);
            mdeMusic.Position = span;
        }

        void timer_Tick(object sender, EventArgs e)
        {
            this.sldProgress.ValueChanged -=
                new RoutedPropertyChangedEventHandler<double>(sldProgress_ValueChanged);

this.sldProgress.Value = this.mdeMusic.Position.TotalSeconds / 10.0;

            this.sldProgress.ValueChanged +=
                new RoutedPropertyChangedEventHandler<double>(sldProgress_ValueChanged);
            try
            {
                this.txtMusicName.Text = "正在播放:" + openFile.SafeFileName;
                //显示播放时间/总时间
                //this.txtMessage.Text = this.mdeMusic.Position.Hours.ToString() + ":" + this.mdeMusic.Position.Minutes.ToString() + ":" + this.mdeMusic.Position.Seconds.ToString() + "/" + this.mdeMusic.NaturalDuration.TimeSpan.Hours.ToString() + ":" + this.mdeMusic.NaturalDuration.TimeSpan.Minutes.ToString() + ":" + this.mdeMusic.NaturalDuration.TimeSpan.Seconds.ToString();
            }
            catch
            {
                MessageBox.Show("出错了:" + e);
            }
        }
    }
}

posted on 2011-12-01 11:05 win_your_lo 阅读(551) 评论(1) 编辑收藏举报