Solved

Casting a ref variable..

Posted on 2003-11-05
2
258 Views
Last Modified: 2010-04-16
Hi,

I wanted to cast a reference to another type..
I have a class Port which implements IPortInput ..

My current variable is : IPortInput anInputPort;

And I have a method as follows: public void Test(ref Port){}

So if I want to call this method by passing a reference of anInputPort (IPortInput) as a type Port instead of type IPortInput which requires casting how can I do that?

Since casting directly by using (Port) ref anInputPort or ref (Port) anInputPort doesnt work..

Can someone give me an example please. Thanks..
0
Comment
Question by:heboh
2 Comments
 
LVL 15

Accepted Solution

by:
SRigney earned 50 total points
ID: 9692039
Why is your current variable
IPortInput anInputPort?

Don't you want to create a main variable of the specific type and the interface is only used by functions that require interface only functionality?

In any case doing something like this should work.
IPortInput anInputPort = new Port();

Port PortToSend = (Port)anInputPort;
Test(ref PortToSend);


If you want to do it within the function call you probably need another layer of parenthesis.  I didn't test this, so I'm not sure if it will work.

Test(ref ((Port) anInputPort));

Good Luck, let me know how it goes.
0
 
LVL 10

Expert Comment

by:ptmcomp
ID: 9702866
Why are you passing it as a reference?? There is usually no sense to do this. If you need to change it then return the changed value.

public Port Test(IPortInput anInputPort)
{

}
0

Featured Post

Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article is for Object-Oriented Programming (OOP) beginners. An Interface contains declarations of events, indexers, methods and/or properties. Any class which implements the Interface should provide the concrete implementation for each Inter…
Real-time is more about the business, not the technology. In day-to-day life, to make real-time decisions like buying or investing, business needs the latest information(e.g. Gold Rate/Stock Rate). Unlike traditional days, you need not wait for a fe…
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…
Internet Business Fax to Email Made Easy - With eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, fr…

813 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

17 Experts available now in Live!

Get 1:1 Help Now