static void Main()
{
//3. invoke the delegate to invoke the method(s)
//calDelAdd.Invoke(12, 13);
//or
//calDelMulti(12, 13);
Downloader downloader = new Downloader();
//downloader.Download;
OperationDel downloadDel = new OperationDel(downloader.Download);
StatusDel successDel = new StatusDel(Program.NotifyOnSuccess);
StatusDel failureDel = new StatusDel(Program.NotifyOnFailure);
Operate(downloadDel, "http://www.google.com", successDel, failureDel);
//2. creat an instance of the delegate
Calculation calculation = new Calculation();
//InvokeCalculationMethods(calculation);
CalDel calDelAdd = new CalDel(calculation.Add);
InvokeCalculationMethods(calDelAdd);
CalDel calDelMulti = new CalDel(Calculation.Multiply);
InvokeCalculationMethods(calDelMulti);
}
static void Operate(OperationDel operationDel, string url, StatusDel success, StatusDel failure)
{
string data = operationDel(url);
if (data != null && data != string.Empty)
{
success(data);
}
else
{
failure("could not get data...check the url");
}
}
