How to create an Analog clock in CSharp using Visual Studio

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In this project we will be learning to create an analog clock in C# using Microsoft Visual Studio.

Form1.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace AnalogClock
{
    public partial class Form1 : Form
    {
        Timer t = new Timer();

        int WIDTH = 300, HEIGHT = 300, secHAND = 140, minHAND = 110, hrHAND = 80;

        //center
        int cx, cy;

        Bitmap bmp;
        Graphics g;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //create bitmap
            bmp = new Bitmap(WIDTH + 1, HEIGHT + 1);

            //center
            cx = WIDTH / 2;
            cy = HEIGHT / 2;

            //backcolor
            this.BackColor = Color.White;

            //timer
            t.Interval = 1000;      //in millisecond
            t.Tick += new EventHandler(this.t_Tick);
            t.Start();
        }

        private void t_Tick(object sender, EventArgs e)
        {
            //create graphics
            g = Graphics.FromImage(bmp);

            //get time
            int ss = DateTime.Now.Second;
            int mm = DateTime.Now.Minute;
            int hh = DateTime.Now.Hour;

            int[] handCoord = new int[2];

            //clear
            g.Clear(Color.White);

            //draw circle
            g.DrawEllipse(new Pen(Color.Black, 1f), 0, 0, WIDTH, HEIGHT);

            //draw figure
            g.DrawString("12", new Font("Arial", 12), Brushes.Black, new PointF(140, 2));
            g.DrawString("3", new Font("Arial", 12), Brushes.Black, new PointF(286, 140));
            g.DrawString("6", new Font("Arial", 12), Brushes.Black, new PointF(142, 282));
            g.DrawString("9", new Font("Arial", 12), Brushes.Black, new PointF(0, 140));

            //second hand
            handCoord = msCoord(ss, secHAND);
            g.DrawLine(new Pen(Color.Red, 1f), new Point(cx, cy), new Point(handCoord[0], handCoord[1]));

            //minute hand
            handCoord = msCoord(mm, minHAND);
            g.DrawLine(new Pen(Color.Black, 2f), new Point(cx, cy), new Point(handCoord[0], handCoord[1]));

            //hour hand
            handCoord = hrCoord(hh%12, mm, hrHAND);
            g.DrawLine(new Pen(Color.Gray, 3f), new Point(cx, cy), new Point(handCoord[0], handCoord[1]));

            //load bmp in picturebox1
            pictureBox1.Image = bmp;

            //disp time
            this.Text = "Analog Clock -  " + hh + ":" + mm + ":" + ss;

            //dispose
            g.Dispose();
        }

        //coord for minute and second hand
        private int[] msCoord(int val, int hlen)
        {
            int[] coord = new int[2];
            val *= 6;   //each minute and second make 6 degree

            if (val >= 0 && val <= 180)
            {
                coord[0] = cx + (int)(hlen * Math.Sin(Math.PI * val / 180));
                coord[1] = cy - (int)(hlen * Math.Cos(Math.PI * val / 180));
            }
            else
            {
                coord[0] = cx - (int)(hlen * -Math.Sin(Math.PI * val / 180));
                coord[1] = cy - (int)(hlen * Math.Cos(Math.PI * val / 180));
            }
            return coord;
        }

        //coord for hour hand
        private int[] hrCoord(int hval, int mval, int hlen)
        {
            int[] coord = new int[2];

            //each hour makes 30 degree
            //each min makes 0.5 degree
            int val = (int)((hval * 30) + (mval * 0.5));

            if (val >= 0 && val <= 180)
            {
                coord[0] = cx + (int)(hlen * Math.Sin(Math.PI * val / 180));
                coord[1] = cy - (int)(hlen * Math.Cos(Math.PI * val / 180));
            }
            else
            {
                coord[0] = cx - (int)(hlen * -Math.Sin(Math.PI * val / 180));
                coord[1] = cy - (int)(hlen * Math.Cos(Math.PI * val / 180));
            }
            return coord;
        }
    }
}

Form1.Designer.cs

namespace AnalogClock
{
    partial class Form1
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.pictureBox1 = new System.Windows.Forms.PictureBox();
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
            this.SuspendLayout();
            // 
            // pictureBox1
            // 
            this.pictureBox1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.pictureBox1.Location = new System.Drawing.Point(0, 0);
            this.pictureBox1.Name = "pictureBox1";
            this.pictureBox1.Size = new System.Drawing.Size(392, 339);
            this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
            this.pictureBox1.TabIndex = 0;
            this.pictureBox1.TabStop = false;
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(392, 339);
            this.Controls.Add(this.pictureBox1);
            this.Name = "Form1";
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
            this.Text = "Analog Clock";
            this.Load += new System.EventHandler(this.Form1_Load);
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.PictureBox pictureBox1;
    }
}

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