Ilia Gildin
Junior Member level 3
hello
I have the following code
and my problem is that no meter how much I will press the button27 it wont stop until the while loop is finished and then I get the The task has been completed message. the backgroundworker1 settings are Generate member = true, Modifiers = private, WorkersReportsProgress = true,
WorkersSuportsCancellation = true, Dowork = backgroundWorker1_DoWork,
RunWorkerCompleted = backgroundWorker1_RunWorkerCompleted
I dont activate the back ground worker anywhere else so what can be my problem?
p.s
I wont paste my whole program here as it takes 1000 lines
please help
I have the following code
Code:
private void button26_Click(object sender, EventArgs e)
{
button1.Enabled = false;
button2.Enabled = false;
button3.Enabled = false;
button4.Enabled = false;
button5.Enabled = false;
button8.Enabled = false;
button14.Enabled = false;
button6.Enabled = false;
button7.Enabled = false;
button9.Enabled = false;
button10.Enabled = false;
button11.Enabled = false;
button12.Enabled = false;
button17.Enabled = false;
button13.Enabled = false;
button19.Enabled = false;
button20.Enabled = false;
button18.Enabled = false;
button23.Enabled = false;
button16.Enabled = false;
button15.Enabled = false;
button21.Enabled = false;
button24.Enabled = false;
button22.Enabled = false;
button25.Enabled = false;
button26.Enabled = false;
if (backgroundWorker1.IsBusy != true)
{
// Start the asynchronous operation.
backgroundWorker1.RunWorkerAsync();
}
}
Code:
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
//NOTE: we shouldn't use a try catch block here (unless you rethrow the exception)
//the backgroundworker will be able to detect any exception on this code.
//if any exception is produced, it will be available to you on
//the RunWorkerCompletedEventArgs object, method backgroundWorker1_RunWorkerCompleted
//try
//{
DateTime start = DateTime.Now;
int y = Convert.ToInt16(textBox28.Text);
Int16 g = Convert.ToInt16(textBox27.Text);
int i = y;
while (i > 0)
{
if ((backgroundWorker1.CancellationPending == true))
{
e.Cancel = true;
break;
}
byte[] b = new byte[1] { Convert.ToByte(textBox13.Text) };
byte[] bytesToSend = new byte[3] { 0x4D, 0x54, 0X55 };
byte[] rv = new byte[bytesToSend.Length + 1];
System.Buffer.BlockCopy(bytesToSend, 0, rv, 0, bytesToSend.Length);
System.Buffer.BlockCopy(b, 0, rv, bytesToSend.Length, b.Length);
byte[] rw = new byte[rv.Length + 1];
System.Buffer.BlockCopy(rv, 0, rw, 0, rv.Length);
System.Buffer.BlockCopy(EOF, 0, rw, rv.Length, EOF.Length);
toolStripStatusLabel1.Text = BitConverter.ToString(rw);
Console.WriteLine(BitConverter.ToString(rw));
if ((backgroundWorker1.CancellationPending == true))
{
e.Cancel = true;
break;
}
//this.serialPort1.Write(rw, 0, rw.Length);
string s;
//s = this.serialPort1.ReadLine();
//s = s.TrimEnd('\r', '\n');
// label13.Text = s;
//if cancellation is pending, cancel work.
if ((backgroundWorker1.CancellationPending == true))
{
e.Cancel = true;
break;
}
System.Threading.Thread.Sleep(g);
byte[] b1 = new byte[1] { Convert.ToByte(textBox14.Text) };
byte[] bytesToSend1 = new byte[3] { 0x4D, 0x54, 0X44 };
byte[] rv1 = new byte[bytesToSend1.Length + 1];
System.Buffer.BlockCopy(bytesToSend1, 0, rv1, 0, bytesToSend1.Length);
System.Buffer.BlockCopy(b1, 0, rv1, bytesToSend1.Length, b1.Length);
byte[] rw1 = new byte[rv1.Length + EOF.Length];
System.Buffer.BlockCopy(rv1, 0, rw1, 0, rv1.Length);
System.Buffer.BlockCopy(EOF, 0, rw1, rv1.Length, EOF.Length);
Console.WriteLine(BitConverter.ToString(rw1));
toolStripStatusLabel1.Text = BitConverter.ToString(rw1);
//this.serialPort1.Write(rw1, 0, rw1.Length);
string s1;
//s1 = this.serialPort1.ReadLine();
// s1 = s1.TrimEnd('\r', '\n');
// label13.Text = s1;
i = i - 1;
if ((backgroundWorker1.CancellationPending == true))
{
e.Cancel = true;
break;
}
}
}
Code:
private void backgroundWorker1_RunWorkerCompleted(object sender,
RunWorkerCompletedEventArgs e)
{
if (e.Cancelled)
{
MessageBox.Show("The task has been cancelled.");
button2.Enabled = true;
button4.Enabled = true;
button5.Enabled = true;
button8.Enabled = true;
button14.Enabled = true;
button6.Enabled = true;
button7.Enabled = true;
button9.Enabled = true;
button10.Enabled = true;
button11.Enabled = true;
button12.Enabled = true;
button17.Enabled = true;
button13.Enabled = true;
button19.Enabled = true;
button20.Enabled = true;
button18.Enabled = true;
button23.Enabled = true;
button16.Enabled = true;
button15.Enabled = true;
button21.Enabled = true;
button24.Enabled = true;
button22.Enabled = true;
button25.Enabled = true;
button26.Enabled = true;
}
else if (e.Error != null)
{
MessageBox.Show("Error.");
button2.Enabled = true;
button4.Enabled = true;
button5.Enabled = true;
button8.Enabled = true;
button14.Enabled = true;
button6.Enabled = true;
button7.Enabled = true;
button9.Enabled = true;
button10.Enabled = true;
button11.Enabled = true;
button12.Enabled = true;
button17.Enabled = true;
button13.Enabled = true;
button19.Enabled = true;
button20.Enabled = true;
button18.Enabled = true;
button23.Enabled = true;
button16.Enabled = true;
button15.Enabled = true;
button21.Enabled = true;
button24.Enabled = true;
button22.Enabled = true;
button25.Enabled = true;
button26.Enabled = true;
}
else
{
MessageBox.Show("The task has been completed.");
button2.Enabled = true;
button4.Enabled = true;
button5.Enabled = true;
button8.Enabled = true;
button14.Enabled = true;
button6.Enabled = true;
button7.Enabled = true;
button9.Enabled = true;
button10.Enabled = true;
button11.Enabled = true;
button12.Enabled = true;
button17.Enabled = true;
button13.Enabled = true;
button19.Enabled = true;
button20.Enabled = true;
button18.Enabled = true;
button23.Enabled = true;
button16.Enabled = true;
button15.Enabled = true;
button21.Enabled = true;
button24.Enabled = true;
button22.Enabled = true;
button25.Enabled = true;
button26.Enabled = true;
}
}
Code:
private void button27_Click(object sender, EventArgs e)
{
//notify background worker we want to cancel the operation.
//this code doesn't actually cancel or kill the thread that is executing the job.
backgroundWorker1.CancelAsync();
}
}and my problem is that no meter how much I will press the button27 it wont stop until the while loop is finished and then I get the The task has been completed message. the backgroundworker1 settings are Generate member = true, Modifiers = private, WorkersReportsProgress = true,
WorkersSuportsCancellation = true, Dowork = backgroundWorker1_DoWork,
RunWorkerCompleted = backgroundWorker1_RunWorkerCompleted
I dont activate the back ground worker anywhere else so what can be my problem?
p.s
I wont paste my whole program here as it takes 1000 lines
please help
