Passing ref arguements

[Balamurukan]

I have one Interface has one Method namely Showlookup
which has one Ref arguement
Like (ref object ctrl)

I want to pass this as ref Arguement when i call the
method.

I tried ShowLookup(ref this);
It shows an error Like u can not pass this as ref or out
parameter Because it is readonly.
Then i tried
ShowLookup(ref object(this));
Now it Shows an Error Like Ref or out Parameter must have
an lvalue.
Then I tried
object obj=object(this);
ShowLookup(ref obj);

Now it won't show any error.
I don't know wether this one is Right or wrong.

Help me in this regard,

Thanks,
Bala

[Miha Markic]

Hi,

You can't use this as ref or out parameter obviously, since this is readonly
reference to current class instance.
You might pass other references though such as your latest example.
--
Miha Markic - RightHand .NET consulting & development
miha at rthand com
www.rhand.com

"Balamurukan" <ba***********@hotmail.com> wrote in message
news:03****************************@phx.gbl...

I have one Interface has one Method namely Showlookup
which has one Ref arguement
Like (ref object ctrl)

I want to pass this as ref Arguement when i call the
method.

I tried ShowLookup(ref this);
It shows an error Like u can not pass this as ref or out
parameter Because it is readonly.
Then i tried
ShowLookup(ref object(this));
Now it Shows an Error Like Ref or out Parameter must have
an lvalue.
Then I tried
object obj=object(this);
ShowLookup(ref obj);

Now it won't show any error.
I don't know wether this one is Right or wrong.

Help me in this regard,

Thanks,
Bala

[Jon Skeet [C# MVP]]

Balamurukan <ba***********@hotmail.com> wrote:

I have one Interface has one Method namely Showlookup
which has one Ref arguement
Like (ref object ctrl)

I want to pass this as ref Arguement when i call the
method.

I tried ShowLookup(ref this);
It shows an error Like u can not pass this as ref or out
parameter Because it is readonly.
Then i tried
ShowLookup(ref object(this));
Now it Shows an Error Like Ref or out Parameter must have
an lvalue.
Then I tried
object obj=object(this);
ShowLookup(ref obj);

Now it won't show any error.
I don't know wether this one is Right or wrong.

I think you need to be very clear on what ref arguments really are. See
http://www.pobox.com/~skeet/csharp/parameters.html

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too