private static void SecondExample()
{
var calc1 = new DoCalculation(Show1);
var calc2 = new DoCalculation(Show2);
// Как очеред, первым скомбинирован - первым выполнится
// Если возвращается значение, это значение будет того, кто выполнился последним
var combine = (DoCalculation)Delegate.Combine(calc1, calc2);
//DoCalculation combine = null;
//combine += calc1; //(DoCalculation)Delegate.Combine(combine, calc1);
//combine += calc2; //(DoCalculation)Delegate.Combine(combine, calc2);
//combine -= calc2; //(DoCalculation)Delegate.Remove(combine, calc1);
//// Если результатом оказывается пустой список вызова, возвращается null.
//// Тут как раз это и происходит => combine is null !!!!!!
//combine -= calc1; //(DoCalculation)Delegate.Remove(combine, calc1);
Calc instance = new EngCalc(10);
string s = combine((EngCalc)instance);
Console.WriteLine(s);
}
static void Main(string[] args)
{
DoCalculation doCalculation1 = SimpleCalculator.Sum;
DoCalculation doCalculation2 = SimpleCalculator.Multiply;
// operator +=
doCalculation1 += doCalculation2;
// static method Delegate.Combine
doCalculation1 = (DoCalculation)Delegate.Combine(
doCalculation1, doCalculation2);
var multipleResult = doCalculation1(10, 5);
Console.WriteLine($"{nameof(multipleResult)} = {multipleResult}");
Console.WriteLine("\n***\n");
// operator -=
doCalculation1 -= doCalculation2;
// method Remove()
doCalculation1 = (DoCalculation)Delegate.Remove(
doCalculation1, doCalculation2);
multipleResult = doCalculation1(10, 5);
Console.WriteLine($"{nameof(multipleResult)} = {multipleResult}");
}
static void Main(string[] args)
{
DoCalculation action1 = Sum; // assuming this method defined
Console.WriteLine($"{action1(1, 2)}");
DoCalculation action2 = (int x, int y) => x * y;
Console.WriteLine($"{action2(3, 5)}");
DoCalculation action3 =
(x, y) =>
{
int z = x * y;
return(z);
};
Console.WriteLine($"{action2(3, 5)}");
// you can omit parentheses in case of the single parameter
Action <string> action4 = x => Console.WriteLine(x);
action4("test");
// you should use empty parentheses in case of absense ot the parameters
Func <float> getPi = () => MathF.PI;
Console.WriteLine(getPi());
}
public Main()
{
//In use
DoCalculation calc = new DoCalculation();
calc.StartCalculation(123, 188, ReceivedResults);
//Cancel after 1sec
Thread.Sleep(1000);
calc.CancelProcess();
}
public Calculator(DoCalculation operation)
{
Operation = operation;
}
