private void _backgroundButton_Click(object sender, EventArgs e)
{
if (this._backgroundButton.Text == "Cancel")
{
timer1.Stop();
_backgroundButton.Text = "Calc";
_digits.Enabled = true;
backgroundWorker1.CancelAsync();
return;
}
else
{
timer1.Start();
pi = new PiObject
{
calcValue = "",
digits = (int)_digits.Value,
};
_digits.Enabled = false;
_backgroundButton.Text = "Cancel";
_pi.Text = string.Empty;
backgroundWorker1.RunWorkerAsync(pi);
}
}
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
PiObject piObj = e.Argument as PiObject;
backgroundWorker1 = sender as BackgroundWorker;
backgroundWorker1.WorkerSupportsCancellation = true;
backgroundWorker1.WorkerReportsProgress = true;
StringBuilder pi = new StringBuilder("3", piObj.digits + 2);
var watch = System.Diagnostics.Stopwatch.StartNew();
if (piObj.digits > 0)
{
pi.Append(".");
for (int i = 0; i < piObj.digits; i += 9)
{
if (!this.backgroundWorker1.CancellationPending)
{
int nineDigits = NineDigitsofPi.StartingAt(i + 1);
int digitCount = Math.Min(piObj.digits - i, 9);
String ds = String.Format("{0:D9}", nineDigits);
pi.Append(ds.Substring(0, digitCount));
piObj.calcValue = pi.ToString();
}
else
{
e.Cancel = true;
}
}// the code that you want to measure comes here
watch.Stop();
}
var elapsedMs = watch.ElapsedMilliseconds;
piObj.elapsedMs = elapsedMs.ToString() + " ms";
}