private void cmdFind_Click(object sender, RoutedEventArgs e)
{
// Disable the button and clear previous results.
cmdFind.IsEnabled = false;
cmdCancel.IsEnabled = true;
lstPrimes.ItemsSource = null;
lblStatus.Text = "";
// Get the search range.
int from, to;
if (!Int32.TryParse(txtFrom.Text, out from))
{
lblStatus.Text = "Invalid From value.";
return;
}
if (!Int32.TryParse(txtTo.Text, out to))
{
lblStatus.Text = "Invalid To value.";
return;
}
// Start the search for primes on another thread.
threadWrapper = new FindPrimesThreadWrapper(from, to);
threadWrapper.Completed += threadWrapper_Completed;
threadWrapper.Cancelled += threadWrapper_Cancelled;
threadWrapper.Start();
lblStatus.Text = "The search is in progress...";
}
private void threadWrapper_Completed(object sender, FindPrimesCompletedEventArgs e)
{
FindPrimesThreadWrapper thread = (FindPrimesThreadWrapper)sender;
this.Dispatcher.BeginInvoke(delegate() {
if (thread.Status == StatusState.Completed)
{
int[] primes = e.PrimeList;
lblStatus.Text = "Found " + primes.Length + " prime numbers.";
lstPrimes.ItemsSource = primes;
}
cmdFind.IsEnabled = true;
cmdCancel.IsEnabled = false;
}
);
}