Conversion Question: C# -> C++ CLI

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karch - 25 Oct 2005 00:53 GMT

I am beginning to write my first applications with C++/CLI and was wondering
if someone could demonstrate the proper way to convert a sample piece of
code. I just need some help understanding the new syntax for handles and
iterating, etc. Thanks in advance for the help.

SoapFormatter formatter = new SoapFormatter();
byte[] buffer = new byte[dept.Capacity];
MemoryStream stream = new MemoryStream(buffer);

foreach (object o in dept) {
formatter.Serialize(stream, o);
}

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Tomas Restrepo (MVP) - 25 Oct 2005 02:17 GMT

Karch,

>I am beginning to write my first applications with C++/CLI and was
>wondering if someone could demonstrate the proper way to convert a sample
[quoted text clipped - 8 lines]
> formatter.Serialize(stream, o);
> }

[not tested]

SoapFormatter^ formatter = gcnew SoapFormatter();
array<Byte>^ buffer = gcnew array<Byte>(dept.Capacity);
MemoryStream^ stream = gcnew MemoryStream(buffer);

for each (Object^ o in dept) {
formatter->Serialize(stream, o);
}

Signature

Tomas Restrepo
tomasr@mvps.org
http://www.winterdom.com/

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karch - 25 Oct 2005 02:24 GMT

Excellent! Worked perfectly, and I'm understanding how the new syntax works
(I think). One more question (I was experimenting while I waited for your
answer).

In this case, dept is an ArrayList:

formatter->Serialize(stream, dept);

but how do I cast dept to an Object^ (which is what the method is
expecting)? This is valid in C#, but having a problem in C++/CLI.

Thanks again.

> Karch,
>
[quoted text clipped - 20 lines]
> formatter->Serialize(stream, o);
> }

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Tomas Restrepo (MVP) - 25 Oct 2005 03:38 GMT

Karch,

> Excellent! Worked perfectly, and I'm understanding how the new syntax
> works (I think). One more question (I was experimenting while I waited for
[quoted text clipped - 6 lines]
> but how do I cast dept to an Object^ (which is what the method is
> expecting)? This is valid in C#, but having a problem in C++/CLI.

You shouldn't need to cast, since all objects have an implicit cast to
Object^.
What specific error are you getting?

Signature

Tomas Restrepo
tomasr@mvps.org
http://www.winterdom.com/

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karch - 25 Oct 2005 03:51 GMT

"Cannot convert parameter 2 from 'System::Collections::ArrayList' to
'System::Object^'"

> Karch,
>
[quoted text clipped - 12 lines]
> Object^.
> What specific error are you getting?

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Marcus Heege - 25 Oct 2005 06:55 GMT

I assume you have done something like this:

ArrayList al;
al.Add(1);
...

gcnew SoapFormatter()->Serialize(al);

This needs some explanation, since you have used a special C++/CLI feature
here: implicitly dereferenced variables. Read my post on the thread "using
C# when adding new feature" from yesterday for more details.

Marcus Heege
www.heege.net

> "Cannot convert parameter 2 from 'System::Collections::ArrayList' to
> 'System::Object^'"
[quoted text clipped - 15 lines]
>> Object^.
>> What specific error are you getting?

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David Anton - 25 Oct 2005 14:05 GMT

If you're doing much conversion from C# to C++/CLI, download the demo of our
C# to C++ converter (www.tangiblesoftwaresolutions.com).

Signature

David Anton
www.tangiblesoftwaresolutions.com
Instant C#: VB.NET to C# Converter
Instant VB: C# to VB.NET Converter
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> I am beginning to write my first applications with C++/CLI and was wondering
> if someone could demonstrate the proper way to convert a sample piece of
[quoted text clipped - 8 lines]
> formatter.Serialize(stream, o);
> }

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Conversion Question: C# -> C++ CLI

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