MBR IT/.NET 247 : NOT ANSWERED passing ref by ref in C# on ASPFriends.com 'aspngescalate' list

NOT ANSWERED passing ref by ref in C#

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Bryan Costanich (Excell Data Corporation)

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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

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charset=3Dus-ascii">

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

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</style>

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<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??

 

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</body>

</html>
=00
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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)

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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

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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 =


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