DELEGATION PROBLEM

[Savas Ates]

I want create a delegate method like that . However It returns ..

CsharpWeb1.deneme.test()' does not match delegate 'void
CsharpWeb1.deneme.foo()
Method 'CsharpWeb1.deneme.test2()' does not match delegate 'void
CsharpWeb1.deneme.foo()'

What is the my mistake ?

public class deneme

{


public int sal ()

{

foo x=new deneme.foo(test);

x+=new deneme.foo(test2);

}


public delegate void foo();

public int test ()

{


return 10;

}

public int test2()

{

return 100;

}

in Page_load

deneme sailim =new deneme ();

sa2.Text=sailim.sal().ToString();

 

[Barry Kelly]

foo x=new deneme.foo(test);

x+=new deneme.foo(test2);

public delegate void foo();

public int test ()

public int test2()

The delegate type "foo" is declared to return void, but both test() and
test2() return int. You either need to change "foo" to return int, or
change test() and test2() to return void.

-- Barry

 

[Savas Ates]

ok thanks for your helping

I changed the code like that

public class deneme

{


public delegate int foo();

public foo sal ()

{

foo x=new deneme.foo(test);

x+=new deneme.foo(test2);

return x;



}

public int test ()

{


return 10;

}




public int test2()

{

return 100;

}




}

It returns
CsharpWeb1.deneme+foo
I expect 10 and 100 which test and test2 methods return ? hoe can i get it
?

 

[Barry Kelly]

foo x=new deneme.foo(test);

x+=new deneme.foo(test2);

return x;

It returns
CsharpWeb1.deneme+foo
I expect 10 and 100 which test and test2 methods return ? hoe can i get it

The type of x is foo. Because it's inside the deneme class, and the
deneme class is inside CsharpWeb1, and the default ToString() of
System.Object is to return the name of the type, and .NET creates nested
class names with '+', the total name of the *type* of x is
"CsharpWeb1.deneme+foo".

To call it, you need to use '()':

return x();

This will return the value of the last delegate attached, i.e. the value
of test2(). The value of the test() call is lost. For this reason, it's
recommended that delegates which return values shouldn't be combined.

-- Barry

 

[Savas Ates]

thank you sir.. Can you offer me any link to have more info about delegation
?