private async void CalculateButton_Click(object sender, EventArgs e)
{
_source = new CancellationTokenSource();
CancellationToken token = _source.Token;
if ((FromTextBox.Text != "") && (ToTextBox.Text != ""))
{
CalculateButton.Enabled = false;
CancelButton.Enabled = true;
var countPrimes = await PrimeFinder.CountPrimesAsync(int.Parse(FromTextBox.Text), int.Parse(ToTextBox.Text),
token.WaitHandle);
CountLabel.Text = string.Format($"Number of primes in range: {countPrimes}.");
if (SaveLocationTextBox.Text != "")
{
var saveLocation = string.Format(SaveLocationTextBox.Text + ".txt");
using (var writer = new StreamWriter(saveLocation, true))
{
writer.WriteLine($"Calculation done on: {DateTime.Now}. Number of primes in range {FromTextBox.Text} to {ToTextBox.Text}: {countPrimes}.");
}
SaveLocationTextBox.Text = string.Format($"Calculation saved to file: \"{saveLocation}\"");
}
CancelButton.Enabled = false;
CalculateButton.Enabled = true;
_source.Dispose();
}
}
