using System;
using System.ComponentModel;
using System.Windows.Forms;
namespace CE.WinForms_backgroundWorker
{
public partial class Form1 : Form
{
// The progress form will be created and shown modally while the
// synchronous process is running. This form will notify the background
// thread if a cancellation is performed. The background thread
// will update the status label and ProgressBar
public Form1()
{
InitializeComponent();
//
this.lbprocessstatus.Visible = false;
}
///<summary>
/// this method will Enable Start procces Button ,
/// setting value 0 for ProgressBar
/// Changing visible status to false
///</summary>
private void reset()
{
this.btnstartprocess.Enabled = true;
this.progressBar1.Value = 0;
this.lbprocessstatus.Visible = false;
}
Boolean Delay()
{
if (this.backgroundWorker1.CancellationPending)
return false;
int a = 0;
while (a < 100 && !this.backgroundWorker1.CancellationPending)
{
//
// Working...
//
System.Threading.Thread.Sleep(100);
a++;
this.backgroundWorker1.ReportProgress(a);
}
return false;
}
///<summary>
/// this event Starts when the DoWork is called.
///</summary>
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
e.Result = Delay();
if (this.backgroundWorker1.CancellationPending)
e.Cancel = true;
}
///<summary>
/// this event Starts when the RunWorkerCompleted is called.
///</summary>
private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
//
// Check to see if the background process was cancelled.
//
if (e.Cancelled)
{
System.Windows.Forms.MessageBox.Show("Processing cancelled.");
reset();
return;
}
if (e.Error!=null)
{
//
// Check to see if an error occurred in the
// background process.
//
System.Windows.Forms.MessageBox.Show(e.Error.Message);
return;
}
//
// Everything completed normally.
// process the response using e.Result
//
if ((bool)e.Result)
System.Windows.Forms.MessageBox.Show("True");
else
System.Windows.Forms.MessageBox.Show("Processing is complete.");
reset();
}
///<summary>
/// this event Starts when the ProgressChanged is called.
///</summary>
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
//
// Update the progressBar with the integer supplied to us from the
// ReportProgress() function. 
//
this.progressBar1.Value = e.ProgressPercentage;
this.lbprocessstatus.Text = "Process Running " + this.progressBar1.Value;
}
///<summary>
/// this event Starts when the Start Procces Button is Clicked.
///</summary>
private void btnstartprocess_Click(object sender, EventArgs e)
{
this.btnstartprocess.Enabled = false;
this.lbprocessstatus.Visible = true;
this.backgroundWorker1.RunWorkerAsync();
}
///<summary>
/// this event fires when the Cancel Procces Button is Clicked.
///</summary>
private void btncancelprocess_Click(object sender, EventArgs e)
{
this.backgroundWorker1.CancelAsync();
}
}
}