wpf播放器

原文:

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 WpfMedia
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        DispatcherTimer timer = null;
        private void mediaElement_MediaOpened(object sender, RoutedEventArgs e)
        {
            sliderPosition.Maximum = mediaElement.NaturalDuration.TimeSpan.TotalSeconds;

            timer = new DispatcherTimer();
            timer.Interval = TimeSpan.FromSeconds(1);
            timer.Tick += timer_Tick;
            timer.Start();
        }

        void timer_Tick(object sender, EventArgs e)
        {
            sliderPosition.Value = mediaElement.Position.TotalSeconds;
        }

        private void button_Click(object sender, RoutedEventArgs e)
        {
            if (button.Content.ToString() == "播放")
            {
                button.Content = "暂停";
                mediaElement.Play();
            }
            else
            {
                button.Content = "播放";
                mediaElement.Pause();
            }
        }

        private void sliderPosition_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
        {
            mediaElement.Position = TimeSpan.FromSeconds(sliderPosition.Value);
        }
    }
}

<Window x:Class="WpfMedia.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="300" Width="300">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="180*"/>
            <RowDefinition Height="89*" />
        </Grid.RowDefinitions>
        <MediaElement x:Name="mediaElement" LoadedBehavior="Manual" Volume="{Binding ElementName=sliderVolumn,Path=Value}"
                      MediaOpened="mediaElement_MediaOpened" Source="D:\海澜之家录屏1.wmv"
                      HorizontalAlignment="Left" Height="175" Margin="7,20,0,0"
                      VerticalAlignment="Top" Width="275" Grid.RowSpan="2"/>
        <Button x:Name="button" Content="播放" Click="button_Click"
                HorizontalAlignment="Left" Margin="10,31,0,0" Grid.Row="1"
                VerticalAlignment="Top" Width="45" RenderTransformOrigin="0.333,-0.526" Height="35">
        </Button>

        <Label x:Name="level1" Content="进度" HorizontalAlignment="Left" Margin="73,21,0,0" Grid.Row="1" VerticalAlignment="Top" Height="25" Width="46" />
        <Label x:Name="level" Content="音量" HorizontalAlignment="Left" Margin="73,50,0,0" Grid.Row="1" VerticalAlignment="Top" Height="25" Width="46" />

        <Slider x:Name="sliderVolume" Minimum="0" Maximum="1" Value="0.5"
                HorizontalAlignment="Left" Margin="119,52,0,0" Grid.Row="1" VerticalAlignment="Top" Width="164" Height="18" />

        <Slider x:Name="sliderPosition" ValueChanged="sliderPosition_ValueChanged"
                HorizontalAlignment="Left" Margin="119,23,0,0" Grid.Row="1" VerticalAlignment="Top" Width="164" Height="18" />
        
        <Label x:Name="label2" Content="{Binding ElementName=sliderPosition,Path=Value}"
               HorizontalAlignment="Left" Margin="140,6,0,0" VerticalAlignment="Top" Height="22" Width="70" Grid.Row="1" />
        
    </Grid>
</Window>