/*
A Programmer's Introduction to C# (Second Edition)
by Eric Gunnerson
Publisher: Apress L.P.
ISBN: 1-893115-62-3
*/
// 29 - Threading and Asynchronous Operations\Asynchronous Calls\A Simple Example
// copyright 2000 Eric Gunnerson
using System;
public class AsynchronousCallsASimpleExample2
{
public static void Main()
{
AsyncCaller ac = new AsyncCaller();
ac.CallWriteLineWithCallback("Hello There");
System.Threading.Thread.Sleep(1000);
}
}
public class AsyncCaller
{
// Declare a delegate that will match Console.WriteLine("string");
delegate void FuncToCall(string s);
public void WriteLineCallback(IAsyncResult iar)
{
Console.WriteLine("In WriteLineCallback");
FuncToCall func = (FuncToCall) iar.AsyncState;
func.EndInvoke(iar);
}
public void CallWriteLineWithCallback(string s)
{
FuncToCall func = new FuncToCall(Console.WriteLine);
func.BeginInvoke(s,
new AsyncCallback(WriteLineCallback),
func); // shows up as iar.AsyncState in callback
}
}
|
