18일 : mp3 플레이어

<!-- MainWindow.xaml -->
<Window x:Class="WpfApp2.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp2"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <!-- Content는 이름. HorizontalAlignment는 좌우정렬, VerticalAlignment는 수직정렬, Margin은 왼쪽/위/오른쪽/아래 순으로 여백, Width는 너비, Height는 높이-->
        <Button x:Name="Play" Content="Play" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Width="50" Height="50" Click="Play_Click"/>
        <Button x:Name="Stop" Content="Stop" HorizontalAlignment="Left" Margin="65,10,0,0" VerticalAlignment="Top" Width="50" Height="50" Click="Stop_Click"/>
        <Button x:Name="Pause" Content="Pause" HorizontalAlignment="Left" Margin="120,10,0,0" VerticalAlignment="Top"  Width="50" Height="50" Click="Pause_Click"/>
        <Button x:Name="Resume" Content="Resume" HorizontalAlignment="Left" Margin="175,10,0,0" VerticalAlignment="Top"  Width="50" Height="50" Click="Resume_Click"/>
        <Slider x:Name="Volume" HorizontalAlignment="Left" Margin="120,99,0,0" VerticalAlignment="Top" ValueChanged="Volume_ValueChanged" Height="24" Width="251" IsMoveToPointEnabled="True"/>
        <Label x:Name="VolumeValue" Content="a" HorizontalAlignment="Left" Margin="65,99,0,0" VerticalAlignment="Top"/>
        <Slider x:Name="Timeline" HorizontalAlignment="Left" Margin="120,177,0,0" VerticalAlignment="Top" Height="22" Width="251" ValueChanged="Timeline_ValueChanged" IsMoveToPointEnabled="True"/>
        <Label x:Name="TimeValue" Content="b" HorizontalAlignment="Left" Margin="64,173,0,0" VerticalAlignment="Top" RenderTransformOrigin="-0.449,0"/>
        <!-- 바꾸려는 애를 클릭 후 속성 탭의 레이아웃에서 많은 것을 쉽게 바꿀 수 있다.-->
        <!-- 속성 탭의 번개를 누르면 그 버튼이 사용할 수 있는 이벤트의 목록이 나옴-->
 
    </Grid>
</Window>
 

//MainWindow.xaml.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
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 System.Windows.Threading;
 
namespace WpfApp2
{
    /// <summary>
    /// MainWindow.xaml에 대한 상호 작용 논리
    /// </summary>
    public partial class MainWindow : Window
    {
        private MediaPlayer player = new MediaPlayer();
        private bool play = false;
        private bool pause = false;
        private int m = 0;
        private int s = 0;
        delegate void Work();
        Thread t1;
        public MainWindow()
        {
            InitializeComponent();
            Volume.Value = 50.0f;
            Volume.Maximum = 100.0f;
            Volume.Minimum = 0;
            VolumeValue.Content = Convert.ToString((int)Volume.Value);
            TimeValue.Content = Convert.ToString((int)m) + ":0" + Convert.ToString((int)s);
            t1 = new Thread(new ThreadStart(TimeCheck));
        }
        private void Play_Click(object sender, RoutedEventArgs e)
        {
            //player.Open(new Uri("C:/Users/user/source/repos/WpfApp2/WpfApp2/150708_extreme_race.mp3"));
 
            if (!play)
            {
                //프로젝트폴더의 bin폴더 안의 debug 폴더에 음악파일을 두면 이렇게도 불러올 수 있음.
                //위는 절대경로, 아래는 상대경로인 셈.
                player.Open(new Uri("150708_extreme_race.mp3", UriKind.Relative));
                player.Play();
                play = true;
                player.MediaEnded += endPlay;//람다 식으로 노래가 끝났을경우 시작
                while (true)
                    if (player.NaturalDuration.HasTimeSpan)
                    {
                        Timeline.Maximum = player.NaturalDuration.TimeSpan.TotalSeconds;
                        break;
                    }
                Play.Dispatcher.BeginInvoke(DispatcherPriority.SystemIdle, new Work(TimeCheck));
            }
        }
 
        private void TimeCheck()
        {
            if (play && !pause)
            {
                Play.Dispatcher.Invoke(DispatcherPriority.Normal, new Action(delegate
                {
                    while (true)
                        if (player.NaturalDuration.HasTimeSpan)
                        {
                            double p = player.NaturalDuration.TimeSpan.TotalSeconds;
                            Timeline.Maximum = player.NaturalDuration.TimeSpan.TotalSeconds;
                            break;
                        }
                }));
                Dispatcher.Invoke(DispatcherPriority.Normal, new Action(delegate 
                {
                    m = (int)player.Position.Minutes;
                    s = (int)player.Position.Seconds;
                    Timeline.Value = (double)(m * 60 + s);
                }));
                
                TimeSpan ts = new TimeSpan(0, 0, m, s, 0);
                string sec;
                if (s > 9)
                    sec = Convert.ToString(s);
                else
                    sec = "0" + Convert.ToString(s);
                Dispatcher.Invoke(DispatcherPriority.Normal, new Action(delegate
                {
                    TimeValue.Content = Convert.ToString((int)m) + ":" + sec;
                }));
                Play.Dispatcher.BeginInvoke(DispatcherPriority.SystemIdle, new Work(TimeCheck));//play가 true이니 다시 실행
            }
        }
 
        private void Stop_Click(object sender, RoutedEventArgs e)
        {
            if (play)
            {
                player.Stop();
                pause = false;
                play = false;
                Timeline.Value = 0;
                TimeValue.Content = "0:00";
            }
        }
 
        private void Pause_Click(object sender, RoutedEventArgs e)
        {
            if (play)
            {
                player.Pause();
                pause = true;
            }
        }
 
        private void Resume_Click(object sender, RoutedEventArgs e)
        {
            if (pause)
            {
                player.Play();
                pause = false;
                Play.Dispatcher.BeginInvoke(DispatcherPriority.SystemIdle, new Work(TimeCheck));
            }
        }
 
        private void endPlay(object sender, EventArgs e)
        {//노래가 완전히 끝났을 경우.
            play = false;
            pause = false;
            Timeline.Value = 0;
            TimeValue.Content = "0:00";
        }
 
        private void Volume_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
        {
            player.Volume = Volume.Value / 100.0f;
            VolumeValue.Content = Convert.ToString((int)Volume.Value);
        }
 
        private void Timeline_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
        {
            if (play)
            {
                int t = (int)Timeline.Value;
                m = t / 60;
                s = t % 60;
                TimeSpan ts = new TimeSpan(0, 0, m, s, 0);
                player.Position = ts;
                string sec;
                if (s > 9)
                    sec = Convert.ToString(s);
                else
                    sec = "0" + Convert.ToString(s);
                TimeValue.Content = Convert.ToString((int)m) + ":" + sec;
            }
            else
            {
                Timeline.Value = 0;
                TimeValue.Content = "0:00";
            }
        }
    }
}
 

MediaOpened, MediaEnded 같은 이벤트 함수들은

player.MediaOpened += loadMusiced; 같은 식으로 함수를 만들어줄 수 있다. (물론 loadMusiced를 만들어줘야 함.)