Mega Code Archive
Thread and UI Demo
<![CDATA[
using System;
using System.Threading;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
public struct MyData {
public double pi;
public int iters;
}
public class Calc {
private double _pi;
private int _iters;
private readonly int TotalIters;
public Calc(int it) {
_iters = 1;
_pi = 0;
TotalIters = it;
}
public MyData PI {
get {
MyData pi = new MyData();
lock (this) {
pi.pi = _pi;
pi.iters = _iters;
}
return pi;
}
}
public Thread MakeThread() {
return new Thread(new ThreadStart(this.ThreadStarter));
}
private void calculate() {
double series = 0;
do {
series ++;
lock (this) {
_iters += 4;
_pi = series * 4;
}
} while (_iters < TotalIters);
}
private void ThreadStarter() {
try {
calculate();
} catch (ThreadAbortException e) {
Console.WriteLine("ThreadAbortException");
}
}
}
public class Form1 : System.Windows.Forms.Form {
private System.Windows.Forms.Label label1;
private System.Windows.Forms.TextBox PiValue;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.TextBox Iteratons;
private Calc pi = new Calc(100000000);
private Thread calcThread = null;
private System.Windows.Forms.Timer timer1;
private System.Windows.Forms.Button StopButton;
private System.Windows.Forms.Button Pause;
private System.ComponentModel.IContainer components;
public Form1() {
this.label1 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.Pause = new System.Windows.Forms.Button();
this.PiValue = new System.Windows.Forms.TextBox();
this.StopButton = new System.Windows.Forms.Button();
this.timer1 = new System.Windows.Forms.Timer(this.components);
this.Iteratons = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// label1
//
this.label1.Location = new System.Drawing.Point(8, 24);
this.label1.Name = "label1";
this.label1.TabIndex = 0;
this.label1.Text = "Value of PI:";
//
// label2
//
this.label2.Location = new System.Drawing.Point(8, 72);
this.label2.Name = "label2";
this.label2.TabIndex = 2;
this.label2.Text = "Iterations:";
//
// Pause
//
this.Pause.Location = new System.Drawing.Point(24, 112);
this.Pause.Name = "Pause";
this.Pause.TabIndex = 5;
this.Pause.Text = "Pause";
this.Pause.Click += new System.EventHandler(this.Pause_Click);
//
// PiValue
//
this.PiValue.Location = new System.Drawing.Point(128, 24);
this.PiValue.Name = "PiValue";
this.PiValue.ReadOnly = true;
this.PiValue.Size = new System.Drawing.Size(136, 20);
this.PiValue.TabIndex = 1;
this.PiValue.Text = "";
//
// StopButton
//
this.StopButton.Location = new System.Drawing.Point(200, 112);
this.StopButton.Name = "StopButton";
this.StopButton.TabIndex = 4;
this.StopButton.Text = "Stop";
this.StopButton.Click += new System.EventHandler(this.StopButton_Click);
//
this.timer1.Enabled = true;
this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
//
this.Iteratons.Location = new System.Drawing.Point(128, 72);
this.Iteratons.Name = "Iteratons";
this.Iteratons.ReadOnly = true;
this.Iteratons.TabIndex = 3;
this.Iteratons.Text = "";
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 149);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.Pause,
this.StopButton,
this.Iteratons,
this.label2,
this.PiValue,
this.label1});
this.Load += new System.EventHandler(this.Form1_Load);
this.Closed += new System.EventHandler(this.Form1_Closed);
this.ResumeLayout(false);
}
[STAThread]
static void Main() {
Application.Run(new Form1());
}
private void Form1_Load(object sender, System.EventArgs e) {
calcThread = pi.MakeThread();
calcThread.Priority = ThreadPriority.Lowest;
calcThread.Start();
}
private void timer1_Tick(object sender, System.EventArgs e) {
if (this.Pause.Text == "Pause") {
MyData p = pi.PI;
this.PiValue.Text = p.pi.ToString();
this.Iteratons.Text = p.iters.ToString();
}
if (calcThread.IsAlive == false) {
StopButton.Enabled = false;
Pause.Enabled = false;
timer1.Enabled = false;
calcThread = null;
}
}
private void StopButton_Click(object sender, System.EventArgs e) {
StopButton.Enabled = false;
Pause.Enabled = false;
timer1.Enabled = false;
calcThread.Abort();
calcThread.Join();
calcThread = null;
}
private void Pause_Click(object sender, System.EventArgs e) {
if (this.Pause.Text == "Pause") {
calcThread.Suspend();
this.Pause.Text = "Resume";
this.StopButton.Enabled = false;
} else {
calcThread.Resume();
this.Pause.Text = "Pause";
this.StopButton.Enabled = true;
}
}
private void Form1_Closed(object sender, System.EventArgs e) {
if (calcThread != null) {
calcThread.Abort();
calcThread.Join();
}
}
}
]]>