CLI Reference Parameter used for CSharp

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Ed - 08 Aug 2007 03:20 GMT

Hi, dear all,
Here are some questions when I was writing CLI code, which would be
used by C# Project.

1. Reference Parameter
If CLI method have % reference type parameter, which is ref class,
could C Sharp use it?

In CLI code:

ClassA::SetB(ClassB% classB);

In CSharp:

ClassA classA=new ClassA();
ClassB classB=new ClassB();

classA.SetB(ref classB);
// But the build was failed:
// error CS1501: No overload for method 'SetB' takes '2' arguments

So, how can I use this CLI method in CSharp project?

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David Anton - 09 Aug 2007 15:22 GMT

Not sure about the "2 arguments" message, but your CLI code should have a hat
in there if ClassB is a ref class:
e.g.,
ClassA::SetB(ClassB ^%classB);

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> Hi, dear all,
> Here are some questions when I was writing CLI code, which would be
[quoted text clipped - 18 lines]
>
> So, how can I use this CLI method in CSharp project?

Reply to this Message

Ben Voigt [C++ MVP] - 09 Aug 2007 15:28 GMT

> Not sure about the "2 arguments" message, but your CLI code should have a
> hat
> in there if ClassB is a ref class:
> e.g.,
> ClassA::SetB(ClassB ^%classB);

I think the original notation is also possible, C# will just ignore the
modopt() attribute.

I suggest using .NET Reflector to view the public API generated by the
compiler.

>> Hi, dear all,
>> Here are some questions when I was writing CLI code, which would be
[quoted text clipped - 18 lines]
>>
>> So, how can I use this CLI method in CSharp project?

Reply to this Message

Ed - 09 Aug 2007 17:50 GMT

> > Not sure about the "2 arguments" message, but your CLI code should have a
> > hat
[quoted text clipped - 40 lines]
>
> >> So, how can I use this CLI method in CSharp project?

Thank you!
I will have a try. And if "the public API generated by the compiler."
means the assembly code generated by compiler?
If so, it seems more and more tricks should be searched from the
assembly code generated by compiler.

Reply to this Message

Ben Voigt [C++ MVP] - 09 Aug 2007 18:52 GMT

> Thank you!
> I will have a try. And if "the public API generated by the compiler."
> means the assembly code generated by compiler?

.NET Reflector can show the signature of each method in any language,
including, for example, C#.

> If so, it seems more and more tricks should be searched from the
> assembly code generated by compiler.

Reply to this Message

CLI Reference Parameter used for CSharp

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