ExamGuru IT/.Net Guru : NOT ANSWERED passing ref by ref in C# on ASPFriends.com 'aspngescalate' list

.NETGURU

NOT ANSWERED passing ref by ref in C#

Messages

Related Types

This message was discovered on ASPFriends.com 'aspngescalate' list.

Bryan Costanich (Excell Data Corporation)

This is a multi-part message in MIME format.

--------------InterScan_NT_MIME_Boundary
Content-Type: multipart/alternative;
 boundary="----_=_NextPart_001_01C1D99E.EB8310E0"

------_=_NextPart_001_01C1D99E.EB8310E0
Content-Type: text/plain;
 charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

Ok, so I have a wrapper function that essentially does the following:

=20

public void DoSomething(ref Object Param1)

{

SomeOtherFunction(ref Param1);

}

=20

Of course, since .net lacks double pointers, when you do this you get
the error of Param1 must be an IValue (can't pass a ref to a ref..)

=20

So I do the following:

=20

public void DoSomething(ref Object Param1)

{

Object objTemp =3D Param1;

SomeOtherFunction(ref objTemp);

Param1 =3D objTemp;

}

=20

of course now I have 3x the operations, AND I'm using memory... Is
there any way around this in .NET?? &Of or something??

=20

------_=_NextPart_001_01C1D99E.EB8310E0
Content-Type: text/html;
 charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

<html>

<head>
<META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; =
charset=3Dus-ascii">

<meta name=3DGenerator content=3D"Microsoft Word 10 (filtered)">

<style>

</style>

</head>

<body lang=3DEN-US link=3Dblue vlink=3Dpurple>

<div class=3DSection1>

Ok, so I have a wrapper function that essentially =
does the
following:

 

public void =
DoSomething(ref
Object Param1)

{

 =
SomeOtherFunction(ref
Param1);

}

 

Of course, since .net lacks double pointers, when you =
do
this you get the error of Param1 must be an IValue (can’t pass a =
ref to a
ref..)

 

So I do the following:

 

public void =
DoSomething(ref
Object Param1)

{

 Object =
objTemp =3D
Param1;

 =
SomeOtherFunction(ref
objTemp);

 Param1 =
=3D objTemp;

}

 

of course now I have 3x the operations, AND I’m =
using
memory… Is there any way around this in .NET?? &Of or
something??

 

</div>

</body>

</html>
=00
------_=_NextPart_001_01C1D99E.EB8310E0--

--------------InterScan_NT_MIME_Boundary--

Reply to this message...

Jon Ide

Bryan,

I tried doing the ref to a ref and it worked just fine for me. My code is:

public class MyClass

{

public MyClass(string str)

{

m_str = str;

}

string m_str;

}

< Windows Application code omitted... >

private void button1_Click(object sender, System.EventArgs e)

{

MyClass class1 = new MyClass("foo");

FooBar1(ref class1);

}

private void FooBar1(ref MyClass mc)

{

FooBar2(ref mc);

}

private void FooBar2(ref MyClass mc)

{

mc = new MyClass("bar");

}

The compiler didn't complain, and the object was modified as expected. Am I
missing the point?

Jon Ide

-----Original Message-----
From: Bryan Costanich (Excell Data Corporation)
[mailto:Click here to reveal e-mail address]
Sent: Monday, April 01, 2002 11:02 AM
To: aspngescalate
Subject: [aspngescalate] NOT ANSWERED passing ref by ref in C#

Ok, so I have a wrapper function that essentially does the following:

public void DoSomething(ref Object Param1)

{

SomeOtherFunction(ref Param1);

}

Of course, since .net lacks double pointers, when you do this you get the
error of Param1 must be an IValue (can't pass a ref to a ref..)

So I do the following:

public void DoSomething(ref Object Param1)

{

Object objTemp = Param1;

SomeOtherFunction(ref objTemp);

Param1 = objTemp;

}

of course now I have 3x the operations, AND I'm using memory... Is there
any way around this in .NET?? &Of or something??

Reply to this message...

Bryan Costanich (Excell Data Corporation)

This is a multi-part message in MIME format.

--------------InterScan_NT_MIME_Boundary
Content-Type: multipart/alternative;
 boundary="----_=_NextPart_001_01C1D9BE.6C16ADA6"

------_=_NextPart_001_01C1D9BE.6C16ADA6
Content-Type: text/plain;
 charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

No, you got it, and you're right. Unfortunately I paraphrased a much
larger problem and misinterpreted it. The problem actually lies in when
I try to pass an object by ref to a DCOM stub and I have to convert it.

=20

Thanks for your help, consider this one solved.. at least for now :-)

=20

-----Original Message-----
From: Jon Ide [mailto:Click here to reveal e-mail address]=20
Sent: Monday, April 01, 2002 12:20 PM
To: aspngescalate
Subject: [aspngescalate] RE: NOT ANSWERED passing ref by ref in C#

=20

Bryan,

=20

I tried doing the ref to a ref and it worked just fine for me. My code
is:

=20

public class MyClass

{

public MyClass(string str)

{

m_str =3D str;

}

=20

string m_str;

}

=20

< Windows Application code omitted... >

=20

private void button1_Click(object sender, System.EventArgs e)

{

MyClass class1 =3D new MyClass("foo");

FooBar1(ref class1);

}

=20

private void FooBar1(ref MyClass mc)

{

FooBar2(ref mc);

}

=20

private void FooBar2(ref MyClass mc)

{

mc =3D new MyClass("bar");

}

=20

The compiler didn't complain, and the object was modified as expected.
Am I missing the point?

=20

Jon Ide

=20

-----Original Message-----
From: Bryan Costanich (Excell Data Corporation)
[mailto:Click here to reveal e-mail address]=20
Sent: Monday, April 01, 2002 11:02 AM
To: aspngescalate
Subject: [aspngescalate] NOT ANSWERED passing ref by ref in C#

=20

Ok, so I have a wrapper function that essentially does the following:

=20

public void DoSomething(ref Object Param1)

{

SomeOtherFunction(ref Param1);

}

=20

Of course, since .net lacks double pointers, when you do this you get
the error of Param1 must be an IValue (can't pass a ref to a ref..)

=20

So I do the following:

=20

public void DoSomething(ref Object Param1)

{

Object objTemp =3D Param1;

SomeOtherFunction(ref objTemp);

Param1 =3D objTemp;

}

=20

of course now I have 3x the operations, AND I'm using memory... Is
there any way around this in .NET?? &Of or something??

=20

| [aspngescalate] member Click here to reveal e-mail address =3D YOUR ID |
http://www.asplists.com/asplists/aspngescalate.asp =3D JOIN/QUIT=20

------_=_NextPart_001_01C1D9BE.6C16ADA6
Content-Type: text/html;
 charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

<html>

<head>
<META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; =
charset=3Dus-ascii">

<meta name=3DGenerator content=3D"Microsoft Word 10 (filtered)">

<style>

</style>

</head>

<body lang=3DEN-US link=3Dblue vlink=3Dpurple>

<div class=3DSection1>

No, you got it, and you’re =
right.
Unfortunately I paraphrased a much larger problem and misinterpreted =
it. The
problem actually lies in when I try to pass an object by ref to a DCOM =
stub and
I have to convert it.

 

Thanks for your help, consider this =
one
solved.. at least for now J

 

-----Original =
Message----- 
From: Jon Ide
[mailto:Click here to reveal e-mail address] 
Sent: Monday, April 01, =
2002 12:20
PM 
To: aspngescalate 
Subject: [aspngescalate] =
RE: NOT
ANSWERED passing ref by ref in C#

 

Bryan,</fo=
nt>

 </fo=
nt>

I tried doing =
the ref to
a ref and it worked just fine for me. My code is:

 </fo=
nt>


public class =
MyClass


{


public =
MyClass(string =
str)


{


m_str =3D str;


}

 


string =
m_str;


}

 </fo=
nt>

< Windows =
Application code
omitted... >

 


private =
void =
button1_Click(object sender,
System.EventArgs e)


{


MyClass class1 =3D new
MyClass("foo");


FooBar1(ref =
class1);


}

 


private =
void FooBar1(ref MyClass =
mc)


{


FooBar2(ref =
mc);


}

 


private =
void FooBar2(ref MyClass =
mc)


{


mc =3D new
MyClass("bar");


}

 </fo=
nt>

The compiler =
didn't
complain, and the object was modified as expected. Am I missing the =
point?

 </fo=
nt>

<div>

Jon =
Ide

 

</div>

-----Original =
Message----- 
From: Bryan Costanich =
(Excell Data
Corporation) [mailto:Click here to reveal e-mail address] 
Sent: Monday, April 01, =
2002 11:02
AM 
To: aspngescalate 
Subject: [aspngescalate] =
NOT
ANSWERED passing ref by ref in C#

 

Ok, so I have a wrapper =
function
that essentially does the following:

 

public void =
DoSomething(ref
Object Param1)

{


SomeOtherFunction(ref Param1);

}

 

Of course, since .net lacks =
double
pointers, when you do this you get the error of Param1 must be an IValue =
(can't
pass a ref to a ref..)

 

So I do the =
following:

 

public void =
DoSomething(ref
Object Param1)

{

 Object =
objTemp =3D
Param1;


SomeOtherFunction(ref objTemp);

 Param1 =
=3D
objTemp;

}

 

of course now I have 3x the
operations, AND I'm using memory... Is there any way around this =
in
.NET?? &Of or something??

 

| =
[aspngescalate] member
Click here to reveal e-mail address =3D YOUR ID |
http://www.asplists.com/asplists/aspngescalate.asp =3D JOIN/QUIT =


</div>

</body>

</html>
=00
------_=_NextPart_001_01C1D9BE.6C16ADA6--

--------------InterScan_NT_MIME_Boundary--

Reply to this message...

System.EventArgs

ExamGuru IT Solutions - .Net Guru is owned and operated by ExamGuru, Inc., the man behind .Net Guru. If you're in the market for bespoke software or software consultancy, why not get him and his highly trained team to help? - www.examguru.net/ITCertification

Need Dot Net Interview Questions?
Ask ExamGuru, Inc. for advice and help on Passing .Net Interviews

.Net Projects
Best-of-breed application framework for .NET projects, developed by ExamGuru, Inc. and ExamGuru IT

Free .net Help
Commission ExamGuru, Inc. and his team for your next bespoke software project

FogBUGZ
The only bug tracking system carefully crafted with one goal in mind: helping teams create great software.

Awesome Tools
If you don't know about these, you're missing out... IT Certification Questions
IT Interview Questions
Free Oracle 10g Training
MCSE Boortcamp
Cisco Study Guides
Cheap Study Guides
Exact Questions
Dot Net Interview Questions
Oracle OCP
Cheap Travel
Designer Perfumes - Wholesale Prices
Free Programming Tutorials

	Copyright © ExamGuru, Inc. 2001-2006
	Contact Us - Terms of Use - Privacy Policy - www.dot-net-guru.com - www.examguru.net - www.oraclesource.net - www.itinterviews.net - www.examguru.net/ITCertification