how to return values from one class to another?

Question

I'm making a program that has three classes:

Output class receives data from other two classes, writes to two new strings, combines with special formatting to another string and outputs it
AidaF class has a method that returns a value(a string) every second
GmailF class has a method that returns a value(a string) every minute or so

so i tired using return string; to return the data from classes 2 and 3 to the first class but that just returns the value to the current class, not to the first class.

Here is this code I'm working on, slimmed down a lot though. but basics are there.

namespace Final { public class Output { public static void Main() { Console.WriteLine(gml + aida); } } public class AidaF { private static System.Timers.Timer aTimer; public static void AMain() { aTimer = new System.Timers.Timer(1000); aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent); aTimer.Interval = 1000; aTimer.Enabled = true; } private static void OnTimedEvent(object source, ElapsedEventArgs e) { ... reader.ReadToFollowing("value"); aida.Append(reader.ReadElementContentAsString()).Append(","); return aida; ... } } public class GmaillF { private static System.Timers.Timer gTimer; public static void GMain() { gTimer = new System.Timers.Timer(200000); gTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent1); gTimer.Interval = 200000; gTimer.Enabled = true; } private static void OnTimedEvent1(object source, ElapsedEventArgs e) { CheckMail(); } public static string CheckMail() { ... gml.Append(reader.ReadElementContentAsString()).Append(","); return gml; ... } } }

I don't really understand what you're asking, but you seem to want to treat classes as procedures/functions... they really are not, practically or semantically. :-P — Noldorin
– Noldorin, Commented Sep 9, 2011 at 23:17
i want to return values from classes 2 and 3 so that class 1 can do something with them. — Csharpz
– Csharpz, Commented Sep 9, 2011 at 23:21
Are you trying to re-invent the "observable collection" pattern? That is, a collection is normally thought of as something you "pull" information from, one thing at a time, like a list of customers. An observable collection pushes information at consumers that are interested in it. — Eric Lippert
– Eric Lippert, Commented Sep 9, 2011 at 23:23
Classes are not things that "return" values; classes represent kinds of things. A class "Newspaper" represents the class of all objects that are newspapers. Methods return values. — Eric Lippert
– Eric Lippert, Commented Sep 9, 2011 at 23:24
this is where i was advised: stackoverflow.com/questions/7314638/… — Csharpz
– Csharpz, Commented Sep 10, 2011 at 1:48

erito · Accepted Answer · 2011-09-09 23:30:43Z

You need to call the exposed static methods from the calling class in order to get this to work, so for example your main would look more like this:

public static void Main() { Console.WriteLine(GmailF.CheckMail() + AidaF.OnTimedEvent()); }

I'm just guessing that CheckMail and OnTimedEvent are the strings you are trying to return. Both CheckMail and OnTimedEvent have to be public static strings for the above to work.

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