Winform图形矩形大数字，并显示在窗体/面板/选项卡

本文关键字：窗体 面板 选项 显示 图形 数字 Winform | 更新日期: 2023-09-27 18:05:33

我需要在winform上绘制两种不同颜色(红色和蓝色)的动态矩形，大小为(10,10)。可以大于100,000+的数字。

当我在winform或panel中绘制它们时，它们开始重叠。我试过滚动条，但我无法做到这一点。当我垂直滚动它们时，形状开始变得混乱。矩形可以有多个(行和列)。

private void button1_Click(object sender, EventArgs e)
        {
            tabControl2.Visible = true;
            Graphics g = FileInfoTab.CreateGraphics();
            Pen p = new Pen(Color.Black);
        for (int y = 158; y < 1000; y += 15)
        {
            for (int x = 120; x < 280; x += 15)
            {
                Random rd = new Random();
                int nm = rd.Next(0, 10);
                if (nm % 2 == 0) //if number is even draw red rectangle else blue rectangle
                {
                    SolidBrush sb = new SolidBrush(Color.Red);
                    g.DrawRectangle(p, x, y, 10, 10);
                    g.FillRectangle(sb, x, y, 10, 10);
                    //x += 15;
                }
                else
                {
                    SolidBrush sb_1 = new SolidBrush(Color.Blue);
                    g.DrawRectangle(p, x, y, 10, 10);
                    g.FillRectangle(sb_1, x, y, 10, 10);
                }
            }
        }
    }

Winform图形矩形大数字，并显示在窗体/面板/选项卡

从Control.CreateGraphics()创建的Graphics对象必须总是在代码退出之前被处理，如下所述:(CreateGraphics() Method and Paint Event Args)

也许你应该考虑使用FileInfoTab。绘制事件:

private Bitmap Surface;
private Graphics g;
private void button1_Click(object sender, EventArgs e)
{
    RedrawSurface();
}
private void RedrawSurface()
{
    tabControl2.Visible = true;
    Surface = new Bitmap(FileInfoTab.Width, FileInfoTab.Height, PixelFormat.Format24bpprgb);
    g = Graphics.FromImage(Surface);
    Pen p = new Pen(Color.Black);
    for (int y = 158; y < 1000; y += 15)
    {
        for (int x = 120; x < 280; x += 15)
        {
            Random rd = new Random();
            int nm = rd.Next(0, 10);
            if (nm % 2 == 0)
            {
                SolidBrush sb = new SolidBrush(Color.Red);
                g.DrawRectangle(p, x, y, 10, 10);
                g.FillRectangle(sb, x, y, 10, 10);
                //x += 15;
            }
            else
            {
                SolidBrush sb_1 = new SolidBrush(Color.Blue);
                g.DrawRectangle(p, x, y, 10, 10);
                g.FillRectangle(sb_1, x, y, 10, 10);
            }
        }
    }
    g.Dispose();
    FileInfoTab.Invalidate();
}
private void FileInfoTab_Paint(object sender, PaintEventArgs e)
{
    if (Surface != null)
    {
        e.Graphics.DrawImage(Surface, 0, 0);
    }
}
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