将多个文件绑定到wpf数据网格

Question

我是WPF的新手，我正在尝试使用MVVM将目录中的歌曲绑定到数据网格。到目前为止，我已经能够使用"foreach循环“绑定一个歌曲文件，但我无法想出显示其余歌曲的逻辑。以下是我到目前为止所做的工作：

using System.IO;

namespace MusicPlayer
{
public class MainWindowViewModel
{
    public MainWindowViewModel()
    {
        Songs = GetSongs();
    }

    public Songs Songs { get; set; }
    string title;
    string artist;
    string album;
    uint year;
    string genre;
    public Songs GetSongs()
    {
        DirectoryInfo di = new DirectoryInfo("C:/Users/USER/MyMusic");
        FileInfo[] Files = di.GetFiles("*.mp3"); //Getting mp3 files
        foreach (FileInfo file in Files)
        {
            string fileName = file.FullName;
            TagLib.File tagFile = TagLib.File.Create(fileName);
            title = tagFile.Tag.Title;
            artist = tagFile.Tag.FirstAlbumArtist;
            album = tagFile.Tag.Album;
            year = tagFile.Tag.Year;
            genre = tagFile.Tag.FirstGenre;
            //string duration = tagFile.Tag.time;
        }
        return new Songs { new Song { Name = title, Artist = artist, Album = album, Year = year, Genre = genre } };
    }
}
}

歌曲课

using System.Collections.ObjectModel;

namespace MusicPlayer
{
    public class Songs : ObservableCollection<Song>
    {
    }
}

宋代班

namespace MusicPlayer
{
    public class Song
    {
        public string Name { get; set; }
        public string Artist { get; set; }
        public string Album { get; set; }
        public string Duration { get; set; }
        public uint Year { get; set; }
        public string Genre { get; set; }
    }
}

xaml.cs文件

using System.Windows;


namespace MusicPlayer
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        MainWindowViewModel mainWindowViewModel;

        public MainWindow()
        {
            InitializeComponent();

            mainWindowViewModel = new MainWindowViewModel();

            DataContext = mainWindowViewModel;          
        }

    }
}

Answer 1

从您的代码片段看，您只需向列表中添加一首歌曲。同样，如果歌曲类确实是从ObservableCollection派生的，那么您可以删除它并直接使用ObservableCollection。因此，在foreach循环之前初始化列表，然后添加歌曲作为循环的一部分：

    DirectoryInfo di = new DirectoryInfo("C:/Users/USER/MyMusic");
    FileInfo[] Files = di.GetFiles("*.mp3"); //Getting mp3 files

    var songs = new ObservableCollection<Song>();
    foreach (FileInfo file in Files)
    {
        string fileName = file.FullName;
        TagLib.File tagFile = TagLib.File.Create(fileName);
        title = tagFile.Tag.Title;
        artist = tagFile.Tag.FirstAlbumArtist;
        album = tagFile.Tag.Album;
        year = tagFile.Tag.Year;
        genre = tagFile.Tag.FirstGenre;
        //string duration = tagFile.Tag.time;
        songs.Add(new Song { Name = title, Artist = artist, Album = album, Year = year, Genre = genre });
    }
    return songs;

那么您的歌曲属性将改为ObservableCollection类型。此外，您可以跳过公共setter，只保留getter，使其成为只读属性(因为我们只在构造函数中设置它，这很好)：

public MainWindowViewModel()
{
    Songs = GetSongs();
}

public ObservableCollection<Song> Songs { get; }