StreamWriter

George2 · 04-15-2008, 03:42 AM

Hello everyone,

For example, my class Foo wraps an object of StreamWriter, I must make Foo implements IDisposable and in the Dispose method of class Foo, invoke Dispose method of the StreamWriter object instance to release resource properly?

Code:

using System.IO;


public class Foo : IDisposable
{
    StreamWriter a;

    public Foo()
	{

	}

    public void Dispose
    {
        if (null != a)
        {
            a.Dispose();
        }
    }

}

thanks in advance,
George

DanFraser · 04-15-2008, 04:14 AM

I have no idea what you're asking this time, but as far as i know, you don't need to do this as garbage collection is automatic.

Code:

using System.IO

public class Foo
{
  StreamWriter a;

  public Foo()
  {
  }
}

GanglyLamb · 04-15-2008, 05:16 AM

Unless you are dealing with some unmanaged code inside that class. More info @ http://www.codeproject.com/KB/cs/gcresdealloc.aspx

George2 · 04-15-2008, 07:12 AM

Thanks DanFraser and GanglyLamb,

One further question which is not answered is what is the relationship between Finalize method and destructor?

Finalize will call destructor or vice versa? Or no relationship? GC will call Finalize, but I am not sure whether GC will call destructor as well?

Quote:

Originally Posted by GanglyLamb

Unless you are dealing with some unmanaged code inside that class. More info @ http://www.codeproject.com/KB/cs/gcresdealloc.aspx

regards,
George

Magos · 04-15-2008, 07:16 AM

Quote:

Originally Posted by George2

Thanks DanFraser and GanglyLamb,

One further question which is not answered is what is the relationship between Finalize method and destructor?

Finalize will call destructor or vice versa? Or no relationship? GC will call Finalize, but I am not sure whether GC will call destructor as well?

regards,
George

http://www.c-sharpcorner.com/UploadF...structors.aspx

George2 · 04-15-2008, 07:39 AM

Thanks Magos,

I have learned that compiler will translate destructor into finalize method.

Two further questions,

1. Is it best practice to implement destructor or implement Finalize?

2. What happens if we implement both destructor and Finalize? Which one will overwrite which one?

Quote:

Originally Posted by Magos

http://www.c-sharpcorner.com/UploadF...structors.aspx

regards,
George

TheRaven · 04-30-2008, 02:07 AM

Streams are closed and then disposed/destroyed as they act allot like, if not identical to, threads.

It is good practice to confirm changes to a stream and then save the stream prior to closing it and initializing the destructor.

George2 · 04-30-2008, 08:08 AM

Thanks TheRaven,

I agree and understand all of your points below, except "act allot like, if not identical to, threads" -- what do you mean?

Quote:

Originally Posted by TheRaven

Streams are closed and then disposed/destroyed as they act allot like, if not identical to, threads.

It is good practice to confirm changes to a stream and then save the stream prior to closing it and initializing the destructor.

regards,
George

04-15-2008, 03:42 AM	#1
George2 Registered User Join Date: May 2006 Posts: 1,579	StreamWriter Hello everyone, For example, my class Foo wraps an object of StreamWriter, I must make Foo implements IDisposable and in the Dispose method of class Foo, invoke Dispose method of the StreamWriter object instance to release resource properly? Code: using System.IO; public class Foo : IDisposable { StreamWriter a; public Foo() { } public void Dispose { if (null != a) { a.Dispose(); } } } thanks in advance, George
George2 is offline

04-15-2008, 04:14 AM	#2
DanFraser Registered User Join Date: Jun 2003 Posts: 90	I have no idea what you're asking this time, but as far as i know, you don't need to do this as garbage collection is automatic. Code: using System.IO public class Foo { StreamWriter a; public Foo() { } } __________________ He who asks is a fool for five minutes, but he who does not ask remains a fool forever. The fool wonders, the wise man asks. - Benjamin Disraeli There are no foolish questions and no man becomes a fool until he has stopped asking questions. Charles Steinmetz
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04-15-2008, 05:16 AM	#3
GanglyLamb and the Hat of Clumsiness Join Date: Oct 2002 Posts: 1,101	Unless you are dealing with some unmanaged code inside that class. More info @ http://www.codeproject.com/KB/cs/gcresdealloc.aspx
GanglyLamb is offline

04-30-2008, 02:07 AM	#7
TheRaven Registered User Join Date: Apr 2008 Location: USA Posts: 22	Streams are closed and then disposed/destroyed as they act allot like, if not identical to, threads. It is good practice to confirm changes to a stream and then save the stream prior to closing it and initializing the destructor.
TheRaven is offline

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