static void Main(string[] args)
{
// now we'll call sayhello by passing it as a parameter
// SayGreeting sayGreeting = new SayGreeting(SayHello);
// telling the delegate to run the sayhello method when it's called
// now we can call saygreeting like it's a method
/*
* Console.WriteLine("what's your name?");
* string input = Console.ReadLine();
* sayGreeting(input);
* Console.ReadLine();
* sayGreeting = new SayGreeting(SayGoodbye);
* sayGreeting(input);
*/
// now we clean up the above
SayGreeting sayGreeting = delegate(string name)
{
Console.WriteLine(string.Format("Hello, {0}", name));
// now the delegate is pointing at an anonymous method
// we can now delete say hello method because we won't need it. we only run it once
};
Console.WriteLine("what's your name?");
string input = Console.ReadLine();
sayGreeting(input);
Console.ReadLine();
sayGreeting = new SayGreeting(SayGoodbye);
sayGreeting(input);
}
static void Main(string[] args)
{
// assigned SayGreeting to the delegate, this will be triggered only once.
SayGreeting sayGreeting = delegate(string name)
{
Console.WriteLine(string.Format("Hello, {0}", name));
};
Func <string, string> conversate = delegate(string message)
{
Console.WriteLine(message);
return(Console.ReadLine());
};
Console.WriteLine("Whats your name:");
string input = Console.ReadLine();
sayGreeting(input); // Hello
//use this for lambda
//sayGreeting = (greeting) =>
sayGreeting = delegate(string name)
{
Console.WriteLine(string.Format("Later, {0}", name));
};
Console.ReadLine();
sayGreeting(input); //Later
Console.ReadKey();
// example using func
conversate("TEST");
}
static void Main(string[] args)
{
SayGreeting sayGreeting = delegate(string name) {
Console.WriteLine(string.Format("Hello, {0}", name));
};
Console.WriteLine("What's your name?");
string input = Console.ReadLine();
sayGreeting(input);
sayGreeting = new SayGreeting(SayGoodbye);
}
static void TestDelegates()
{
// these three delegate declarations produce exactly the same code
var sayGreeting = new SayGreeting(SayHello);
SayGreeting sayGreeting1 = SayHello;
Action <string> sayGreeting2 = SayHello;
sayGreeting("Nick");
// use an anonymous method instead of a named one
Action <string> sayBye = (name) => Console.WriteLine(string.Format("Bye, {0}", name));
sayBye("Nick");
}
static void Main(string[] args)
{
//SayGreeting sayGreeting = new SayGreeting(SayHello);
SayGreeting sayGreeting = delegate(string name) //anonymous method, a method that doesn't have a name. functionality is defined as we assign it to the delegate
{
Console.WriteLine(string.Format("Hello, {0}", name));
};
Console.WriteLine("What's your name? ");
string input = Console.ReadLine();
sayGreeting(input);
Console.ReadLine();
sayGreeting = new SayGreeting(SayGoodbye);
sayGreeting(input);
Console.ReadLine(); //used to wait before closing CLI
}
