private void button1_Click(object sender, EventArgs e)
{
int firstNumber, secondNumber;
int.TryParse(textBox1.Text, out firstNumber);
int.TryParse(textBox2.Text, out secondNumber);
currentDelegate PrimesCalculator = new currentDelegate(new calculatePrimes().CalcPrimes);
PrimesCalculator.BeginInvoke(firstNumber, secondNumber, callbackMethod, PrimesCalculator);
}
// method name should begin with big letter, why static?? why new class??
public static void callbackMethod(IAsyncResult Iasync)
{
AsyncResult res = (AsyncResult)Iasync;
CallbackClass callback = new CallbackClass();
currentDelegate caller = (currentDelegate)res.AsyncDelegate;
var PrimeNumbers = caller.EndInvoke(Iasync);
foreach (var number in PrimeNumbers)
{
callback.addToList(number);
}
}
// method name should begin with big letter
private void callbackMethod(IAsyncResult Iasync)
{
// delete first 2 lines and define "PrimesCalculator" as parameter class
AsyncResult res = (AsyncResult)Iasync;
CallbackClass callback = new CallbackClass();
currentDelegate caller = (currentDelegate)res.AsyncDelegate;
var PrimeNumbers = caller.EndInvoke(Iasync);
foreach (var num in PrimeNumbers)
{
// invoke - synchronic , beginInvoke - asynchronic
// The UI is blocked
Invoke((MethodInvoker) delegate
{
listBox1.Items.Add(num);
});
}
}
