camviewer

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;
using System.IO.Ports;
using System.Diagnostics;
using System.IO;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        SerialPort myPort = null;
        Image image = null;
        List<byte> buffer = new List<byte>();

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            myPort = new SerialPort("COM10");
            myPort.Open();
            myPort.DataReceived += new SerialDataReceivedEventHandler(myPort_DataReceived);
        }
        
        void myPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            string line = myPort.ReadLine();
            Debug.WriteLine(line);
            if (line.Substring(0, 2) == "S0") // start
            {
                buffer.Clear();
                return;
            }
            if (line.Substring(0, 2) == "S9") // end of block
            {
                byte[] byteArray = new byte[buffer.Count];
                for (int i = 0; i < buffer.Count; i++)
                {
                    byteArray[i] = buffer[i];
                }
                MemoryStream ms = new MemoryStream(byteArray);
                try
                {
                    image = Image.FromStream(ms);
                }
                catch (ArgumentException)
                {
                    Debug.WriteLine("ArgumentException");
                    return;
                }
                Invalidate();
                return;
            }
            if (line.Substring(0, 2) == "S1")
            {
                string s = line.Substring(2, 2);
                int slen = Convert.ToInt32(s, 16);
                int data_len = slen - 3;
                for (int i = 0; i < data_len; i++)
                {
                    s = line.Substring(8+i * 2, 2);
                    byte x = Convert.ToByte(s, 16);
                    buffer.Add(x);
                 }
                return;
            }
        }

        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            if (image != null)
            {
                e.Graphics.DrawImage(image, 0, 0, 320, 240);
            }
        }
    }
}