public static void DelegateComposition()
{
var sum = new AddMultNumbers(DelegatesExamples.AddNumbers);
var multiply = new AddMultNumbers(DelegatesExamples.MultiplyNumbers);
var addMult = sum + multiply;
foreach (AddMultNumbers item in addMult.GetInvocationList())
{
item(8, 5);
}
Console.WriteLine("Result: {0}", addMult(5, 7));
addMult = (AddMultNumbers)Delegate.Remove(addMult, multiply);
Console.WriteLine("After removing multiply method.");
addMult(10, 5);
addMult = (AddMultNumbers)Delegate.RemoveAll(addMult, sum);
Console.WriteLine("After removing all sum methods");
if (addMult == null)
{
Console.WriteLine("Now delegate is not pointing to any method.");
}
}
public static void EventToAddMultiplyExample()
{
var sum = new AddMultNumbers <int>(DelegatesExamples.AddNumbers);
var multiply = new AddMultNumbers <int>(DelegatesExamples.MultiplyNumbers);
EventToAddMultiply += sum; //adding delegate instance to the event
EventToAddMultiply += multiply;
//Methods fired: AddNumbers, MultiplyNumbers are also known as event handlers
EventToAddMultiply(5, 8);//firing the event
}
public static void AddMultiplyNumbers()
{
var Sum = new AddMultNumbers(DelegatesExamples.AddNumbers);
AddMultNumbers Multiply = DelegatesExamples.MultiplyNumbers;
var num1 = 5;
var num2 = 8;
Console.WriteLine("Sum of {0} and {1} is: {2}", num1, num2, Sum(num1, num2));
Console.WriteLine("Product of {0} and {1} is: {2}", num1, num2, Multiply(num1, num2));
}
public static void AnonymousMethodExample()
{
AddMultNumbers <int> sum = delegate(int a, int b)
{
var addition = a + b;
Console.WriteLine("Sum of {0} and {1} is: {2}", a, b, addition);
return(addition);
};
var result = sum(45, 75);
Console.WriteLine("Result: {0}", result);
}
public static void GenericAddMultiplyExample()
{
AddMultNumbers <int> sumInt = DelegatesExamples.AddNumbers;
AddMultNumbers <float> sumFloat = DelegatesExamples.AddNumbers;
AddMultNumbers <int> multiplyInt = DelegatesExamples.MultiplyNumbers;
AddMultNumbers <float> multiplyFloat = DelegatesExamples.MultiplyNumbers;
AddMultNumbers <int, float> trgArea = DelegatesExamples.CaculateTriangleArea;
sumInt(5, 6);
sumFloat(5.5F, 6.8F);
multiplyInt(5, 6);
multiplyFloat(5.5F, 6.50F);
trgArea(5, 7);
}
public static void MulticastDelegateExample()
{
AddMultNumbers addMult = DelegatesExamples.AddNumbers;
addMult += DelegatesExamples.MultiplyNumbers;
//iterate over invocation list
foreach (var item in addMult.GetInvocationList())
{
var d = ((AddMultNumbers)item);
var n1 = 5;
var n2 = 6;
Console.WriteLine("\nMethod: {0}", d.Method);
Console.WriteLine("Result of {0} and {1}: {2}", n1, n2, d(5, 6));
if (d.Method.Name == "AddNumbers")
{
Console.WriteLine("This is '{0}' Method.", d.Method.Name);
}
else if (d.Method.Name == "MultiplyNumbers")
{
Console.WriteLine("This is '{0}' Method.", d.Method.Name);
}
}
Console.WriteLine("\n\nMultiplication of {0} and {1} is: {2}", 5, 10, addMult(5, 10));
addMult -= DelegatesExamples.MultiplyNumbers;
Console.WriteLine("Sum of {0} and {1} is: {2}", 5, 10, addMult(5, 10));
addMult -= DelegatesExamples.AddNumbers;
if (addMult == null)
{
Console.WriteLine("\n\nDelegate is not pointing to any method.");
}
}
