Draw a triangle on the form using C#.NET

It shows how to draw a triangle on the form using C#.NET

Keywords: C#.net, CSharp.NET, triangle, drawing, graphics.

First import a namespace

using System.Drawing;

Place the code in the paint event for the form.

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace testc

{

    public partial class Form1 : Form

    {

        Graphics gr_graphics = default(Graphics);

        //need a pen for drawing and make it black

        Pen pen_draw = new Pen(Color.Black);

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

         

        }

        private void Form1_Paint(object sender, PaintEventArgs e)

        {

            gr_graphics = e.Graphics;

            //Draw a triangle on the form.

            //first have to define an array of points.

            Point[] pnt = new Point[3];

          

            pnt[0].X = 150;

            pnt[0].Y = 150;

            pnt[1].X = 150;

            pnt[1].Y = 200;

            pnt[2].X = 50;

            pnt[2].Y = 120;

            gr_graphics.DrawPolygon(pen_draw, pnt);

        }   

    }

}