Kullanılan C# kavramları : Asynchronous Threading, Windows Forms, Components, Exception Handling, etc // Prime Numbers. © 2005 Halil Özgür - halil.ozgur [at] gmail.com

using System;
using System.ComponentModel;
using System.Drawing;
using System.IO;
using System.Threading;
using System********s.Forms;

namespace isPrime
{
/// <summary>
/// isPrimeForm : Main and the only Form.
/// </summary>
public class isPrimeForm : System********s.Forms.Form
{
#region Declarations, Ctor & Dispose()

private System.Threading.Thread PrimeTesterThread;
private delegate void testCompleteHandler(bool isPrime,ulong catched);
private event testCompleteHandler testComplete;

private System.Threading.Thread RangeTesterThread;
private delegate void rangeTestCompleteHandler();
private event rangeTestCompleteHandler rangeTestComplete;

private decimal number = 0m , rangeStart = 0m , rangeEnd = 0m , ct = 0m;
private string firstLine = "";

private System********s.Forms.GroupBox groupBoxInput;
private System********s.Forms.ProgressBar progressBar;
private System********s.Forms.TextBox textBoxInput;
private System********s.Forms.Button buttonClear;
private System********s.Forms.TabControl tabControl;
private System********s.Forms.TabPage tabPageSingle;
private System********s.Forms.TabPage tabPageRange;
private System********s.Forms.TextBox textBoxRangeStart;
private System********s.Forms.TextBox textBoxRangeEnd;
private System********s.Forms.Label labelRangeTo;
private System********s.Forms.Label labelRangeFrom;
private System********s.Forms.LinkLabel linkLabel;
private System********s.Forms.Label labelInfoSingle;
private System********s.Forms.Button buttonTest;
private System********s.Forms.Button buttonStart;
private System********s.Forms.TextBox textBoxRangeResults;
private System********s.Forms.TextBox textBoxStatusSingle;
private System********s.Forms.Button buttonCancelRange;
private System********s.Forms.ProgressBar progressBarRange;
private System********s.Forms.Button buttonSave;
private System********s.Forms.SaveFileDialog saveFileDialog;
private System********s.Forms.Label labelNumberCount;
private System********s.Forms.CheckBox checkBoxNC;
private System********s.Forms.Button buttonCancel;

public isPrimeForm()
{
InitializeComponent();
this.testComplete += new testCompleteHandler(this.testHandler);
this.rangeTestComplete += new rangeTestCompleteHandler(this.rangeTestHandler);
}

protected override void Dispose( bool disposing )
{
if ( this.PrimeTesterThread != null )
this.PrimeTesterThread.Abort();
if ( this.RangeTesterThread != null )
this.RangeTesterThread.Abort();
base.Dispose( disposing );
}
#endregion
#region Windows Form Designer generated code
private void InitializeComponent()
{
// ...
// InitializeComponent() kısmı.
// ...
}
[STAThread]
static void Main()
{
Application.Run(new isPrimeForm());
}
#endregion

private void isPrimeForm_Load(object sender, System.EventArgs e)
{
this.Size = new Size( 327 , 295 );
}

private void buttonTest_Click(object sender, System.EventArgs e)
{
string msg;
if ( validateInput( this.textBoxInput.Text , out this.number , out msg ) )
{
this.buttonClear.Enabled = this.buttonTest.Enabled = this.textBoxInput.Enabled = false;
this.buttonCancel.Enabled = true;
this.CancelButton = this.buttonCancel;
this.labelInfoSingle.Text = "[ ESC = cancel ]";
this.tabPageSingle.Cursor = Cursors.WaitCursor;
this.firstLine = this.number.ToString( "N0" ) + "\r\n\r\n";
this.textBoxStatusSingle.Text = firstLine + "Testing...";
this.progressBar.Value = 0;
this.progressBar.Show();
this.progressBar.Select();
this.PrimeTesterThread = new Thread(new ThreadStart(this.primeTestThreadStart));
this.PrimeTesterThread.Start();
}
else
{
this.textBoxStatusSingle.Text = msg;
this.textBoxInput.Focus();
}
}

private void buttonStart_Click(object sender, System.EventArgs e)
{
string msg;
if ( this.validateInput( this.textBoxRangeStart.Text , out this.rangeStart , out msg )
&& this.validateInput( this.textBoxRangeEnd.Text , out this.rangeEnd , out msg ) )
{
this.textBoxRangeStart.Enabled = this.textBoxRangeEnd.Enabled = this.buttonSave.Enabled
= this.buttonStart.Enabled = this.textBoxRangeResults.Enabled = false;
this.buttonCancelRange.Enabled = true;
this.tabPageRange.Cursor = Cursors.WaitCursor;
this.textBoxRangeResults.Clear();
this.labelNumberCount.Show();
this.progressBarRange.Value = 0;
this.progressBarRange.Show();
this.progressBarRange.Select();
this.RangeTesterThread = new Thread(new ThreadStart(this.rangeTestThreadStart));
this.RangeTesterThread.Start();
}
else
this.textBoxRangeResults.Text = msg;
}

private void buttonCancel_Click(object sender, System.EventArgs e)
{
this.PrimeTesterThread.Abort();
this.textBoxStatusSingle.Text = this.firstLine + "Canceled.";
this.testEnd();
}

private void buttonCancelRange_Click(object sender, System.EventArgs e)
{
this.RangeTesterThread.Abort();
this.textBoxRangeResults.AppendText( "Canceled.\r\n" );
this.rangeTestEnd();
}

private void buttonClear_Click(object sender, System.EventArgs e)
{
this.textBoxInput.Text = "";
this.textBoxInput.Focus();
}

private void testHandler(bool isPrime,ulong catched)
{
this.BeginInvoke(new testCompleteHandler(this.test_Complete) ,
new Object[] { isPrime , catched } );
}

private void rangeTestHandler()
{
this.BeginInvoke(new rangeTestCompleteHandler(this.rangeTest_Complete));
}

private void test_Complete(bool isPrime,ulong catched)
{
this.PrimeTesterThread.Abort();
if ( isPrime )
this.textBoxStatusSingle.Text = firstLine + "PRIME.";
else if ( catched > 0 )
this.textBoxStatusSingle.Text = firstLine + "NOT Prime, divisible to " + catched.ToString("N0");
else
this.textBoxStatusSingle.Text = firstLine + "NOT Prime.";
this.testEnd();
}

private void rangeTest_Complete()
{
this.RangeTesterThread.Abort();
this.rangeTestEnd();
}

private void testEnd()
{
this.PrimeTesterThread = null;
GC.Collect();
this.buttonClear.Enabled = this.buttonTest.Enabled = this.textBoxInput.Enabled = true;
this.buttonCancel.Enabled = false;
this.CancelButton = this.buttonClear;
this.tabPageSingle.Cursor = Cursors.Default;
this.labelInfoSingle.Text = "[ ENTER = test , ESC = clear ]";
this.progressBar.Hide();
this.textBoxInput.Focus();
}

private void rangeTestEnd()
{
this.textBoxRangeResults.AppendText( "Number Count : " + this.ct.ToString( "N0" ) + "\r\n" );
this.RangeTesterThread = null;
GC.Collect();
this.buttonStart.Enabled = this.textBoxRangeStart.Enabled = this.buttonSave.Enabled
= this.textBoxRangeEnd.Enabled = this.textBoxRangeResults.Enabled = true;
this.buttonCancelRange.Enabled = false;
this.labelNumberCount.Hide();
this.tabPageRange.Cursor = Cursors.Default;
this.progressBarRange.Hide();
this.textBoxRangeStart.Focus();
}

private void primeTestThreadStart()
{
ulong result = this.primeTest( this.number );
switch ( result )
{
case 1:
this.testComplete( true , 1 );
break;
default:
this.testComplete( false , result );
break;
}
}

private void rangeTestThreadStart()
{
ulong result;
decimal start = 0m , end = this.ct = 0m;

if ( this.rangeStart < 2 )
start = 1;
else
start = this.rangeStart;

if ( this.rangeEnd < 2 )
end = 1;
else
end = this.rangeEnd;

if ( start > end )
{
decimal temp = start;
start = end;
end = temp;
}

this.textBoxRangeResults.AppendText( "Prime numbers between " + this.rangeStart.ToString("N0") + " and " + this.rangeEnd.ToString("N0") + " :\r\n" );
decimal numbers = (decimal)Math.Ceiling( ((double)((this.rangeEnd - this.rangeStart)/50)) );
decimal step_r = ( (numbers)%2 == 0 ? numbers + 1 : numbers );
start--;
while ( end > start++ )
{
result = this.primeTest(start);
if ( result == 1 )
{
this.textBoxRangeResults.AppendText( start.ToString( "N0" ) + "\r\n" );
this.ct++;
if ( this.checkBoxNC.Checked )
this.labelNumberCount.Text = "Number Count :\r\n" + ct.ToString("N0");
}
if ( start % step_r == 0 )
this.progressBarRange.PerformStep();
}
this.rangeTestComplete();
}

private ulong primeTest( decimal n )
{
if ( n < 2 )
return 0;
if ( n == 2 || n == 3 )
return 1;
if ( n % 2 == 0 )
return 2;
else
{
ulong end = (ulong)Math.Ceiling( Math.Sqrt( (double)n ) ) + 1;
ulong step = ( (end/60) % 2 == 0 ? end/60 + 1 : end/60 );
for ( ulong i = 3 ; i <= end ; i += 2 )
{
if ( n % i == 0 )
return i;
if ( i % step == 0 )
this.progressBar.PerformStep();
}
return 1;
}
}

private bool validateInput( string s , out decimal n , out string errMsg )
{
n = 0m;
errMsg = null;
if ( s.Length == 0 )
{
errMsg = "\r\nENTER A NUMBER TO TEST";
return false;
}
try
{
n = Convert.ToDecimal(s);
}
catch ( System.FormatException )
{
errMsg = "ENTER A POSITIVE INTEGER,\r\nNOT A STRING ";
return false;
}
catch ( System.OverflowException )
{
errMsg = "ENTER AN INTEGER\r\nBETWEEN 2^96 and - (2^96)";
return false;
}
return true;
}

private void linkLabel_LinkClicked(object sender, System********s.Forms.LinkLabelLinkClickedEventArgs e)
{
System.Diagnostics.Process.Start("mailto:[email protected]?subject=about isPrime");
}

private void tabControl_SelectedIndexChanged(object sender, System.EventArgs e)
{
if ( this.tabControl.SelectedIndex == 0 )
{
this.Size = new Size( 327 , 295 );
this.textBoxInput.Focus();
}
else
{
this.Size = new Size( 336 , 368 );
this.textBoxRangeStart.Focus();
}
}

private void buttonSave_Click(object sender, System.EventArgs e)
{
this.saveFileDialog.ShowDialog();
}

private void saveFileDialog_FileOk(object sender, System.ComponentModel.CancelEventArgs e)
{
StreamWriter sw = new StreamWriter( this.saveFileDialog.FileName );
sw.Write( this.textBoxRangeResults.Text );
sw.Close();
}

private void textBoxes_DragEnter(object sender, System********s.Forms.DragEventArgs e)
{
if (e.Data.GetDataPresent(DataFormats.Text))
e.Effect = DragDropEffects.Copy;
else
e.Effect = DragDropEffects.None;
}

private void textBoxes_DragDrop(object sender, System********s.Forms.DragEventArgs e)
{
((TextBox)sender).Text = e.Data.GetData(DataFormats.Text).ToString();
}

}
}