Drawing multiple objects in C#

It's because you've hooked the Paint event. It will only draw the one line on your paint event. The hard way to do this would be to create an array to store all of the lines and then iterate through the array on the Paint event.

The simpler way is to hook the MouseUp instead and just draw the new line on the MouseUp. Doing that, you also don't need to hook the MouseMove as you'll have the end position already.

Hi,

This is a simple example of an application doing roughly what you want (note that this is just to get you started, there are better ways of drawing in C#);

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;

namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        IList<Point> points = new List<Point>();

        public Form1()
        {
            this.MouseClick += new MouseEventHandler(Form1_MouseClick);
        }

        void Form1_MouseClick(object sender, MouseEventArgs e)
        {
            points.Add(e.Location);
            this.Invalidate(); // This causes the form to repaint
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);
            Point previousPoint = Point.Empty;
            foreach (Point point in points)
            {
                if (previousPoint != Point.Empty)
                {
                    e.Graphics.DrawLine(Pens.Black, previousPoint, point);
                }
                previousPoint = point;
            }
        }

        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}

The object in my case may be any drawing object e.g rectanlge, ellipse, line,polygon etc. is there any method to store all the drawn object in arraylist or list. if so then please guide me.