Assing address of a method to a variable.

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Hi Everyone,

Suppose Class "A" has a method getsum() .If we want to get the address of the getsum() method and assign it to a variable of reference type..is this the way:

A a=getsum;----Is it like if we dont include the address ,the address of that method will be assigned to teh variable.Is this true?

Regards
Chaithanya M

Posted 21-Apr-11 2:09am

M.CHAITHANYA

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Ankit Rajput · Accepted Answer · 2011-04-21T02:12:00

Solution 1

Read this article.

Delegate

You need to use the delegates for handling a function address.

Regards
Ankit

Posted 21-Apr-11 2:12am

Ankit Rajput

Comments

Nish Nishant 21-Apr-11 8:52am

Voted 5!

M.CHAITHANYA 21-Apr-11 9:00am

Hi Ankit,
Cant we assign address of a method to a class variable .If so how and what happens if we do this?

Regards
Chaithanya M

BobJanova 21-Apr-11 9:13am

No. Delegates are how runtime method selection is done in C#. They are essentially managed function pointers. Read the article.

Sergey Alexandrovich Kryukov 21-Apr-11 14:46pm

READ IT!!!!!!!!!!!!!!!!!!!
Shall I say it again?
There are no "addresses". This is a managed platform.
--SA

Sergey Alexandrovich Kryukov 21-Apr-11 14:47pm

My 5. This is the solution.
--SA

Sergey Alexandrovich Kryukov 21-Apr-11 14:53pm

I also added the clarification on the nature of delegates: why it is not the "address".
Please see.
--SA

CPallini · Accepted Answer · 2011-04-21T02:15:00

Solution 2

C# has delegates for this, see Delegates (C# Programming Guide)[^].

Posted 21-Apr-11 2:15am

CPallini

Comments

Nish Nishant 21-Apr-11 8:52am

Voted 5!

CPallini 21-Apr-11 8:59am

Thank you. :-)

Sergey Alexandrovich Kryukov 21-Apr-11 14:47pm

Same solution, a 5.
--SA

CPallini 21-Apr-11 15:36pm

Thanks!

Sergey Alexandrovich Kryukov 21-Apr-11 14:53pm

I also added the clarification on the nature of delegates: why it is not the "address".
Please see.
--SA

Sergey Alexandrovich Kryukov · Accepted Answer · 2011-04-21T08:53:00

Just to add some clarification.

Delegates are not references or addresses. In OOP and instance method, a method used in delegate is not one "address". It's two: one is the "address" if entry point, another is "this", a reference to instance of the class used in a method call. If not "this", how a method would access the instance member. You can use static methods in delegates as well, so "this" can be null (unused).

Now, a delegate instance is not even a pair of "addresses". If you look at one using Reflection, you will find that it is a… a class instance. This class implements the invocation lists, so multiple handlers can be added.

—SA