对于一个萌新来说，要实现一个音乐播放器还是很难的一个作业，我先寻求了组里的同学和一个外组同学的帮助，然后才开始自己的工作。

    好在xmal控件中有一个MediaPlayer控件，

于是我写了这样的代码

这样就基本完成了播放器的主题，随后我用Grid对界面进行了简单排版

因为要求能够选取文件，于是我去问了万能的度娘，然后找到了这段代码

于是我写了下面的代码

因为是音乐播放器，所以在拓展名的地方我改成了MP3和MP4。

途中，因为头文件的缘故导致开始的代码是运行不了的，最后通过系统自动补全的代码解决了这个问题。

然后运行的结果

 因为电脑刚重装了系统，vs和git链接那里出了一点问题，我就把代码粘在博客里了，emmmmmm

 

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Storage;
using Windows.Storage.Pickers;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Media.Imaging;
using Windows.UI.Xaml.Navigation;

// https://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x804 上介绍了“空白页”项模板

namespace MediaPlayer
{
    /// <summary>
    /// 可用于自身或导航至 Frame 内部的空白页。
    /// </summary>
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }

        private async void Button_GetFile_Click(object sender, RoutedEventArgs e)
        {
            FileOpenPicker openPicker = new FileOpenPicker();
            openPicker.ViewMode = PickerViewMode.Thumbnail;
            openPicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;

            openPicker.FileTypeFilter.Add(".mp3");
            openPicker.FileTypeFilter.Add(".mp4");
            openPicker.FileTypeFilter.Add(".rmvb");
            StorageFile file = await openPicker.PickSingleFileAsync();
            if (file != null)
            {
                var stream = await file.OpenAsync(Windows.Storage.FileAccessMode.Read);
                Player.SetSource(stream, file.ContentType);
            }
            else
            {
                return;
            }


        }

    }
}

 

<Page
    x:Class="MediaPlayer.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:MediaPlayer"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d" Width="1000">

    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="100" />
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="100" />
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="100" />
            <RowDefinition Height="*" />
            <RowDefinition Height="100" />
        </Grid.RowDefinitions>
        <Button
            x:Name="Button_GetFile"
            Width="200" Height="100"
            Content="读取文件"
            FontSize="36"
            Click="Button_GetFile_Click" 
            Grid.Column="1" Grid.Row="2"
            HorizontalAlignment="Left"/>
        <TextBlock Name="Head"
            Grid.Column="0" Grid.Row="0" Width="200" Height="100">
            Player
        </TextBlock>
        <Grid Grid.Column="1" Grid.Row="1">
           
            <MediaElement
                Name="Player"
                HorizontalAlignment="Stretch"
                VerticalAlignment="Bottom"
                AutoPlay="True"
                AreTransportControlsEnabled="True"
                Height="auto" />
           
        </Grid>
    </Grid>
   
</Page>