private void button1_Click(object sender, EventArgs e)
{
Thread t1 = new Thread(DrawGraph.Draw);
DrawParas drawParas = new DrawParas();
drawParas.graphics = panel1.CreateGraphics();
drawParas.count = 200;
drawParas.maxH = panel1.Height;
drawParas.maxW = panel1.Width;
t1.IsBackground = true;
t1.Start(drawParas);
}
public static void Draw(object o)
{
DrawParas drawParas = o as DrawParas;
if (drawParas == null)
{
Exception e = new Exception();
throw e;
}
Random random = new Random();
for (int i = 0; i <= drawParas.count; i++)
{
var color = Color.FromArgb(random.Next(256), random.Next(256), random.Next(256));
SolidBrush solidBrush = new SolidBrush(color);
var x = random.Next(drawParas.maxW);
var y = random.Next(drawParas.maxH);
var rect = new Rectangle(x, y, 50, 80);
drawParas.graphics.FillEllipse(solidBrush, rect);
Thread.Sleep(30);
}
}
