How to show Clock with system time using with Timer control in windows forms C#.net || Clock Example with System Time in window forms dot net.

Introduction:

The following article describes how to display clock in a window form using timer control.
Step 1:
Open Visual Studio->new Project->Window Form application

 Step 2: 
Go to Solution explorer right click on project solution add new item->User control with name "Clocktimer".
Add timer control  from toolbox to user control and write the following code in clocktimer.cs

clocktimer.cs
 

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Drawing;

using System.Data;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace clockdisplay

{

    public partial class clocktimer : UserControl

    {

        const float PI = 3.141592654F;

        DateTime dateTime;

        float fRadius, fCenterX, fCenterY, fCenterCircleRadius, fHourLength;

        float fMinLength, fSecLength, fHourThickness, fMinThickness, fSecThickness;

        bool bDraw5MinuteTicks = true;

        bool bDraw1MinuteTicks = true;

        float fTicksThickness = 2;

        Color hrColor = Color.DarkGoldenrod;

        Color minColor = Color.DarkMagenta;

        Color secColor = Color.DarkSlateBlue;

        Color circleColor = Color.DarkSeaGreen;

        Color ticksColor = Color.Red;

        //    private System.Windows.Forms.Timer timer1;

       // private System.ComponentModel.IContainer components;

        public clocktimer()

        {

            InitializeComponent();

        }

        private void clocktimer_Load(object sender, EventArgs e)

        {

            dateTime = DateTime.Now;

            this.clocktimer_Resize_1(sender, e);

        }

        private void timer1_Tick(object sender, EventArgs e)

        {

            this.dateTime = DateTime.Now;

            this.Refresh();

        }

        private void DrawLine(float fThickness, float fLength, Color color, float fRadians, System.Windows.Forms.PaintEventArgs e)

        {

            e.Graphics.DrawLine(new Pen(color, fThickness),

                fCenterX - (float)(fLength / 9 * System.Math.Sin(fRadians)),

                fCenterY + (float)(fLength / 9 * System.Math.Cos(fRadians)),

                fCenterX + (float)(fLength * System.Math.Sin(fRadians)),

                fCenterY - (float)(fLength * System.Math.Cos(fRadians)));

        }

        private void DrawPolygon(float fThickness, float fLength, Color color, float fRadians, System.Windows.Forms.PaintEventArgs e)

        {

            PointF A = new PointF((float)(fCenterX + fThickness * 2 * System.Math.Sin(fRadians + PI / 2)),

                (float)(fCenterY - fThickness * 2 * System.Math.Cos(fRadians + PI / 2)));

            PointF B = new PointF((float)(fCenterX + fThickness * 2 * System.Math.Sin(fRadians - PI / 2)),

                (float)(fCenterY - fThickness * 2 * System.Math.Cos(fRadians - PI / 2)));

            PointF C = new PointF((float)(fCenterX + fLength * System.Math.Sin(fRadians)),

                (float)(fCenterY - fLength * System.Math.Cos(fRadians)));

            PointF D = new PointF((float)(fCenterX - fThickness * 4 * System.Math.Sin(fRadians)),

                (float)(fCenterY + fThickness * 4 * System.Math.Cos(fRadians)));

            PointF[] points = { A, D, B, C };

            e.Graphics.FillPolygon(new SolidBrush(color), points);

        }

      

        public Color HourHandColor

        {

            get { return this.hrColor; }

            set { this.hrColor = value; }

        }

        public Color MinuteHandColor

        {

            get { return this.minColor; }

            set { this.minColor = value; }

        }

        public Color SecondHandColor

        {

            get { return this.secColor; }

            set

            {

                this.secColor = value;

                this.circleColor = value;

            }

        }

        public Color TicksColor

        {

            get { return this.ticksColor; }

            set { this.ticksColor = value; }

        }

        public bool Draw1MinuteTicks

        {

            get { return this.bDraw1MinuteTicks; }

            set { this.bDraw1MinuteTicks = value; }

        }

        public bool Draw5MinuteTicks

        {

            get { return this.bDraw5MinuteTicks; }

            set { this.bDraw5MinuteTicks = value; }

        }

        private void clocktimer_Paint_1(object sender, PaintEventArgs e)

        {

            float fRadHr = (dateTime.Hour % 12 + dateTime.Minute / 60F) * 30 * PI / 180;

            float fRadMin = (dateTime.Minute) * 6 * PI / 180;

            float fRadSec = (dateTime.Second) * 6 * PI / 180;

            DrawPolygon(this.fHourThickness, this.fHourLength, hrColor, fRadHr, e);

            DrawPolygon(this.fMinThickness, this.fMinLength, minColor, fRadMin, e);

            DrawLine(this.fSecThickness, this.fSecLength, secColor, fRadSec, e);

            for (int i = 0; i < 60; i++)

            {

                if (this.bDraw5MinuteTicks == true && i % 5 == 0) // Draw 5 minute ticks

                {

                    e.Graphics.DrawLine(new Pen(ticksColor, fTicksThickness),

           fCenterX + (float)(this.fRadius / 1.50F * System.Math.Sin(i * 6 * PI / 180)),

           fCenterY - (float)(this.fRadius / 1.50F * System.Math.Cos(i * 6 * PI / 180)),

           fCenterX + (float)(this.fRadius / 1.65F * System.Math.Sin(i * 6 * PI / 180)),

           fCenterY - (float)(this.fRadius / 1.65F * System.Math.Cos(i * 6 * PI / 180)));

                }

                else if (this.bDraw1MinuteTicks == true) // draw 1 minute ticks

                {

                    e.Graphics.DrawLine(new Pen(ticksColor, fTicksThickness),

          fCenterX + (float)(this.fRadius / 1.50F * System.Math.Sin(i * 6 * PI / 180)),

          fCenterY - (float)(this.fRadius / 1.50F * System.Math.Cos(i * 6 * PI / 180)),

          fCenterX + (float)(this.fRadius / 1.55F * System.Math.Sin(i * 6 * PI / 180)),

          fCenterY - (float)(this.fRadius / 1.55F * System.Math.Cos(i * 6 * PI / 180)));

                }

            }

            //draw circle at center

  e.Graphics.FillEllipse(new SolidBrush(circleColor), fCenterX - fCenterCircleRadius / 2, fCenterY - fCenterCircleRadius / 2, fCenterCircleRadius, fCenterCircleRadius);

        }

        private void clocktimer_Resize_1(object sender, EventArgs e)

        {

             this.Width = this.Height;

            this.fRadius = this.Height / 2;

            this.fCenterX = this.ClientSize.Width / 2;

            this.fCenterY = this.ClientSize.Height / 2;

            this.fHourLength = (float)this.Height / 3 / 1.85F;

            this.fMinLength = (float)this.Height / 3 / 1.20F;

            this.fSecLength = (float)this.Height / 3 / 1.15F;

            this.fHourThickness = (float)this.Height / 100;

            this.fMinThickness = (float)this.Height / 150;

            this.fSecThickness = (float)this.Height / 200;

            this.fCenterCircleRadius = this.Height / 50;

            timer1.Start();

        }

     }

}

 Step 3: 

 

Go to Form1[design].cs and add panel from toolbox then write the following code in Form1.cs 

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.Windows.Forms;

namespace clockdisplay

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            clocktimer obj = new clocktimer();

            panel1.Controls.Add(obj);

        }

    }

}

 

DEMO: