Sorot item ListBox berdasarkan nilai dari kelas

Ya, itu mungkin dengan cara:

• Ikat ListBox ke GameService.AllGames() yang saya yakin mengembalikan daftar atau array objek Game.

• Setel ListBox. DrawMode ke DrawMode.OwnerDrawFixed dan menangani rel ListBox.DrawItem untuk menggambar item sesuai dengan GameAvailable propertinya.

Dengan asumsi nama kontrol adalah Form1 dan listBox1, tambahkan konstruktor Form1:

public Form1()
{
    InitializeComponent();
    //...

    listBox1.DrawMode = DrawMode.OwnerDrawFixed;
    listBox1.DrawItem += (s, e) => OnListBoxDrawItem(s, e); 
    listBox1.DataSource = GameService.AllGames();
}

Katakanlah Anda ingin menampilkan game yang tersedia dengan warna hijau dan sisanya dengan warna latar depan merah.

private void OnListBoxDrawItem(object sender, DrawItemEventArgs e)
{
    //Comment if you don't need to show the selected item(s)...
    e.DrawBackground();

    if (e.Index == -1) return;

    var game = listBox1.Items[e.Index] as Game;
    var foreColor = game.GameAvailable ? Color.Green : Color.Red;

    //Pass the listBox1.BackColor instead of the e.BackColor 
    //if you don't need to show the selection...
    TextRenderer.DrawText(e.Graphics, game.GameName, e.Font,
        e.Bounds, foreColor, e.BackColor,
        TextFormatFlags.Left | TextFormatFlags.VerticalCenter);
}

... atau dengan warna latar belakang berbeda:

private void OnListBoxDrawItem(object sender, DrawItemEventArgs e)
{
    if (e.Index == -1) return;

    var game = listBox1.Items[e.Index] as Game;          

    var backColor = e.State.HasFlag(DrawItemState.Selected)
        ? e.BackColor
        : game.GameAvailable
        ? Color.LightGreen
        : listBox1.BackColor;

    //Or this if you don't need to show the selection ...
    //var backColor = game.GameAvailable
    //  ? Color.LightGreen
    //  : listBox1.BackColor;

    using (var br = new SolidBrush(backColor))
        e.Graphics.FillRectangle(br, e.Bounds);

    TextRenderer.DrawText(e.Graphics, game.GameName, e.Font,
        e.Bounds, Color.Black, backColor,
        TextFormatFlags.Left | TextFormatFlags.VerticalCenter);
}

... atau dengan beberapa ya dan tidak gambar dari sumber daya Anda:

Bitmap YesImage, NoImage;

public Form1()
{
    InitializeComponent();
    //...

    YesImage = Properties.Resources.YesImage;
    NoImage = Properties.Resources.NoImage;

    listBox1.DrawMode = DrawMode.OwnerDrawFixed;
    listBox1.DrawItem += (s, e) => OnListBoxDrawItem(s, e);
    listBox1.DataSource = GameService.AllGames();
    this.FormClosed += (s, e) => { YesImage.Dispose(); NoImage.Dispose(); };
}

private void OnListBoxDrawItem(object sender, DrawItemEventArgs e)
{
    if (e.Index == -1) return;

    var game = listBox1.Items[e.Index] as Game;
    var backColor = e.State.HasFlag(DrawItemState.Selected)
        ? e.BackColor
        : listBox1.BackColor;
    var bmp = game.GameAvailable ? YesImage : NoImage;
    var rectImage = new Rectangle(
        3, e.Bounds.Y + ((e.Bounds.Height - bmp.Height) / 2),
        bmp.Width, bmp.Height
        );
    var rectTxt = new Rectangle(
        rectImage.Right + 3, e.Bounds.Y,
        e.Bounds.Right - rectImage.Right - 3,
        e.Bounds.Height
        );

    using (var br = new SolidBrush(backColor))
        e.Graphics.FillRectangle(br, e.Bounds);

    e.Graphics.DrawImage(bmp, rectImage);

    TextRenderer.DrawText(e.Graphics, game.GameName, e.Font,
            rectTxt, Color.Black, backColor,
            TextFormatFlags.Left | TextFormatFlags.VerticalCenter);
}