Draw Signature On Mobile Computer Screen (Portable Terminal Device) C#

Draw Signature On Mobile Computer Screen (Portable Terminal Device) C#

 

 

Fig 1 : Design Screen of Smart Device Application

 

Write the following code in the application

 

Name Spaces

using System;
using System.Linq;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Reflection;
using System.Drawing.Imaging;
using System.Collections;
using System.Runtime.InteropServices;

In Partial Class

public partial class Form2 : Form
    {
        string Img;


        private string AppPath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().GetName().CodeBase);
        private Signature cSignature;
        private Point? _Previous = null;
        private Pen _Pen = new Pen(Color.Black);

Create Events of PictureBox

private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
        {
            _Previous = new Point(e.X, e.Y);
            pictureBox1_MouseMove(sender, e);
        }

        private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
        {
            if (_Previous != null)
            {
                if (pictureBox1.Image == null)
                {
                    Bitmap bmp = new Bitmap(pictureBox1.Width, pictureBox1.Height);
                    using (Graphics g = Graphics.FromImage(bmp))
                    {
                        g.Clear(Color.White);
                    }
                    pictureBox1.Image = bmp;
                }
                using (Graphics g = Graphics.FromImage(pictureBox1.Image))
                {
                    g.DrawLine(_Pen, _Previous.Value.X, _Previous.Value.Y, e.X, e.Y);
                }
                pictureBox1.Invalidate();
                _Previous = new Point(e.X, e.Y);
            }
        }

        private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
        {
            _Previous = null;
        }

Clear Button Click Event :

private void btnClear_Click_1(object sender, EventArgs e)
        {
            pictureBox1.Image = null;
        }

Lets see the output below : 

 

 

 Its Done