The Practical Guide to Multithreading - Part 1

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

using System.Threading;

namespace Multithreading_Guide_1
{
    public partial class frmExample1 : Form
    {
        private void btnProcess_Click(object sender, EventArgs e)
        {
            int nStart = Convert.ToInt32(txtStart.Text);
            int nEnd = Convert.ToInt32(txtEnd.Text);

            prgProcess.Minimum = nStart;
            prgProcess.Maximum = nEnd;
            for (int nValue = nStart; nValue <= nEnd; nValue++)
            {
                lblStatus.Text = "Processing item: " + Convert.ToString(nValue);
                prgProcess.Value = nValue;

                // Try uncommenting following line, the application
                // would be responsive, as explained in article.
                // Application.DoEvents();

            }

        }

        
        delegate void DelegateType(int x);
        DelegateType TheDelegate;

        int StartFrom, EndTo;

        private void btnStartThreaded_Click(object sender, EventArgs e)
        {
            TheDelegate = MessageHandler;

            StartFrom = Convert.ToInt32(txtStart.Text);
            EndTo = Convert.ToInt32(txtEnd.Text);

            prgProcess.Minimum = StartFrom;
            prgProcess.Maximum = EndTo;

            btnStartThreaded.Enabled = false;

            Thread MyThread = new Thread(ProcessRoutine);
            MyThread.Start();
        }

        void MessageHandler(int nProgress)
        {
            lblStatus.Text = "Processing item: " + Convert.ToString(nProgress);
            prgProcess.Value = nProgress;
        }


        void ProcessRoutine()
        {
            // Do processing here.
            // We better make this method 'static'
            // But we'll take those things later.
            // Here we can use all member of class directly (since we have 'this')                      

            for (int nValue = StartFrom; nValue <= EndTo; nValue++)
            {
                this.Invoke(this.TheDelegate, nValue);
            }
        }


        public frmExample1()
        {
            InitializeComponent();
            // TheDelegate = MessageHandler;
        }




    }
}