public void PerformForDialog()
{
ReportFeedback rfb = new ReportFeedback(ReportOnDialog);
DoubleIt bo = new DoubleIt();
bo.DoIt(100, rfb);
}
public void PerformForConsole()
{
ReportFeedback rfb = new ReportFeedback(ReportOnConsole);
DoubleIt bo = new DoubleIt();
bo.DoIt(10, rfb);
}
public void PerformUsingSyntacticSugar()
{
DoubleIt bo = new DoubleIt();
bo.DoIt(6, ReportOnDialog); //No needs to construct a delegate object.
//No need to define a callback method, use lambda expression instead.
bo.DoIt(8, (val) => Console.WriteLine(val));
}
public void FancyPerformForAll()
{
ReportFeedback rfb1 = new ReportFeedback(ReportOnConsole);
ReportFeedback rfb2 = new ReportFeedback(ReportOnDialog);
ReportFeedback rfbChain = null;
rfbChain += rfb1;
rfbChain += rfb2;
DoubleIt bo = new DoubleIt();
bo.DoIt(100, rfbChain);
}
public void PerformForAllUsingInvocationList()
{
ReportFeedback rfb1 = new ReportFeedback(ReportOnConsole);
ReportFeedback rfb2 = new ReportFeedback(ReportOnDialog);
ReportFeedback rfbChain = null;
rfbChain += rfb1;
rfbChain += rfb2;
Delegate[] delegates = rfbChain.GetInvocationList();
DoubleIt bo = new DoubleIt();
foreach (ReportFeedback del in delegates)
{
bo.DoIt(100, del);
}
}
public void PerformForAll()
{
ReportFeedback rfb1 = new ReportFeedback(ReportOnConsole);
ReportFeedback rfb2 = new ReportFeedback(ReportOnDialog);
//Delegate.Combine combines null and rfb1.
//Now both rfbChain and rfb1 point to same delegate object. Please note invocation list (_invocationList) is null so far.
//When rfbChain and rfb2 are combined, _invocationList has items pointing to rfb1 and rfb2. Now, rfbChain points to delegate object having that _invocationlist.
ReportFeedback rfbChain = null;
rfbChain = (ReportFeedback)Delegate.Combine(rfbChain, rfb1);
rfbChain = (ReportFeedback)Delegate.Combine(rfbChain, rfb2);
DoubleIt bo = new DoubleIt();
bo.DoIt(100, rfbChain);
}
public void PerformForNone()
{
DoubleIt bo = new DoubleIt();
bo.DoIt(10, null);
}