WPF_Practice/PacticeSolution/MediaPlayer/MainWindow.xaml.cs

using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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 System.Windows.Threading;

namespace MediaPlayer
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private DispatcherTimer _playTimer;

        public MainWindow()
        {
            InitializeComponent();
            InitInstance();
        }

        private void InitInstance()
        {
            _playTimer = new DispatcherTimer();
            _playTimer.Interval = TimeSpan.FromSeconds(1);
            _playTimer.Tick -= TickTimer;
            _playTimer.Tick += TickTimer;
            _playTimer.Start();
        }

        private void mediaElem_MediaOpened(object sender, RoutedEventArgs e)
        {
            playSlider.Minimum = 0;
            playSlider.Maximum = mediaElem.NaturalDuration.TimeSpan.TotalSeconds;
        }

        private void mediaElem_MediaEnded(object sender, RoutedEventArgs e)
        {
            mediaElem.Stop();
        }

        private void mediaElem_MediaFailed(object sender, ExceptionRoutedEventArgs e)
        {
            MessageBox.Show($"Play error: {e.ErrorException.Message}");
        }

        private void playSlider_DragStarted(object sender, System.Windows.Controls.Primitives.DragStartedEventArgs e)
        {
            mediaElem.Pause();
        }

        private void playSlider_DragCompleted(object sender, System.Windows.Controls.Primitives.DragCompletedEventArgs e)
        {
            mediaElem.Position = TimeSpan.FromSeconds(playSlider.Value);
            mediaElem.Play();
        }

        private void playSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
        {
            mediaElem.Position = TimeSpan.FromSeconds(playSlider.Value);
        }

        private void playButton_Click(object sender, RoutedEventArgs e)
        {
            mediaElem.Play();
        }

        private void PauseButton_Click(object sender, RoutedEventArgs e)
        {
            mediaElem.Pause();
        }

        private void StopButton_Click(object sender, RoutedEventArgs e)
        {
            mediaElem.Stop();
        }

        private void volumeSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
        {
            mediaElem.Volume = volumeSlider.Value;
        }

        private void openButton_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog dlg = new OpenFileDialog();
            if (dlg.ShowDialog() != true)
                return;

            mediaElem.Source = new Uri(dlg.FileName);
            mediaElem.Volume = volumeSlider.Value;
            mediaElem.SpeedRatio = 1;

            mediaElem.Play();
        }

        private void TickTimer(object? sender, EventArgs e)
        {
            if (mediaElem.Source == null)
            {
                playTimeLabel.Content = "No File";
                return;
            }

            if (!mediaElem.NaturalDuration.HasTimeSpan)
                return;

            playSlider.Value = mediaElem.Position.TotalSeconds;
            playTimeLabel.Content = $"{mediaElem.Position.ToString(@"hh\:mm\:ss")} / {mediaElem.NaturalDuration.TimeSpan.ToString(@"hh\:mm\:ss")}";
        }
    }
}