Question

How to draw pixels on random places with random colors in Windows Forms (WinForms) C#

Answer 1

using System;
using System.Drawing;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Random rnd = new Random();

            int x, y;

            Color c = Color.FromArgb(rnd.Next(0, 255), rnd.Next(0, 255), rnd.Next(0, 255));
            SolidBrush solidbrush = new SolidBrush(c);

            Graphics g = this.CreateGraphics();

            for (int i = 1; i < 10000; i++)
            {
                  x = rnd.Next(1, 400);
                  y = rnd.Next(1, 300);

                  g.FillRectangle(solidbrush, x, y, 1, 1);
                  solidbrush.Color = Color.FromArgb(rnd.Next(0, 255), rnd.Next(0, 255), rnd.Next(0, 255));
            }
            solidbrush.Dispose();
            g.Dispose();
        }
    }
}

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