从像素数组绘制图像[重复]

Question

我正在尝试编写一个代码，该代码从索引数组中绘制一组像素，这些像素指向另一个数组（基本上是调色板）中的颜色值。除了使用图片框在屏幕上绘制图像外，我还很陌生，所以我对这样的东西没有适当的经验。根据我的研究，这段代码应该可以工作，但表格上没有任何内容。有什么想法我在这里做错了吗？

public string[] colors = new string[] { "#FFFF0000", "#FF00FF00", "#FF0000FF", "#FFFFFF00", "#FFFF00FF", "#FF00FFFF" };
public byte[] pixels = new byte[] { 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5 };

public byte scale = 2;

public void PaintPixels()
{
    Graphics g = CreateGraphics();

    int x = 0;
    int y = 0;

    for (int p = 0;  p < pixels.Length; p++)
    {
        using (var brush = new SolidBrush(ColorTranslator.FromHtml(colors[pixels[p]])))
        {
            g.FillRectangle(brush, x, y, scale, scale);
        }

        x += scale;

        if(x > 255)
        {
            y += scale;
            x = 0;
        }
    }
}

private void Form1_Load(object sender, EventArgs e)
{
    Width = 256 * scale;
    Height = 240 * scale;

    PaintPixels();
}

Answer 1

只需像这样覆盖Form.OnPaint(PaintEventArgs e)：

public partial class Form1 : Form
{
    private static readonly string[] colors =
        new string[] { "#FFFF0000", "#FF00FF00", "#FF0000FF", "#FFFFFF00", "#FFFF00FF", "#FF00FFFF" };
    private static readonly byte[] pixels =
        new byte[] { 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5 };
    private static readonly byte scale = 10;

    public Form1()
    {
        InitializeComponent();
    }

    protected override void OnPaint(PaintEventArgs e)
    {
        base.OnPaint(e);
        for (int p = 0, x = 0, y = 0; p < pixels.Length; p++, x += scale)
        {
            if (x > 255)
            {
                x = 0;
                y += scale;
            }

            using (var brush = new SolidBrush(ColorTranslator.FromHtml(colors[pixels[p]])))
                e.Graphics.FillRectangle(brush, x, y, scale, scale);
        }
    }
}

它给出：