How do you write a COM server in C# VS 2003? I can't believe it but I can't
even find the words COM in the help for VS related to COM servers. Did
Microsoft Rename it again or can VS C# not handle the task? Why is there
nothing available for me to read?
Thanks,
glenn
12  1652 
> How do you write a COM server in C# VS 2003? I can't believe it but I can't even find the words COM in the help for VS related to COM servers. Did
Microsoft Rename it again or can VS C# not handle the task? Why is there
nothing available for me to read?
Because C# is a .NET langauge, there isn't direct support for building
COM servers, you should be thinking .NET assemblies. If you aren't
going to stick to .NET, VS C++ still includes the ATL framework, which
is probably the most comprehensive way to put together COM servers.
So to get this straight. If I want to write a COM server that would allow
someone writing another program in another language, I can not use C#? Boy
does this change my opinion of .NET rather dramatically... .
Thanks,
glenn
"Jason" <ja***@nospam.c om> wrote in message
news:ua******** *****@TK2MSFTNG P09.phx.gbl... How do you write a COM server in C# VS 2003? I can't believe it but I
can't even find the words COM in the help for VS related to COM servers. Did
Microsoft Rename it again or can VS C# not handle the task? Why is
there nothing available for me to read?
Because C# is a .NET langauge, there isn't direct support for building
COM servers, you should be thinking .NET assemblies. If you aren't
going to stick to .NET, VS C++ still includes the ATL framework, which
is probably the most comprehensive way to put together COM servers.
"Jason" <ja***@nospam.c om> wrote in message
news:ua******** *****@TK2MSFTNG P09.phx.gbl... How do you write a COM server in C# VS 2003? I can't believe it but I
can't
even find the words COM in the help for VS related to COM servers. Did
Microsoft Rename it again or can VS C# not handle the task? Why is there
nothing available for me to read?
Because C# is a .NET langauge, there isn't direct support for building COM
servers, you should be thinking .NET assemblies. If you aren't going to
stick to .NET, VS C++ still includes the ATL framework, which is probably
the most comprehensive way to put together COM servers.
C# is a programming language, and as such doesn't support COM directly (nor
does C++), but this is handled by the Framework and the CLR. That means that
basically each managed class can be exposed as a COM class, sure you have to
respect some design guidelines when exposing to native COM clients, but it's
perfectly possible and fully supported and used extensively by the framework
and VS.
To OP, check the MSDN library - http://msdn.microsoft.com/library/de...tcomserver.asp
and this: http://msdn.microsoft.com/library/de...tcomserver.asp
and this: http://msdn.microsoft.com/library/de...tcomserver.asp
COM servers can be implemented by deriving from ServicedCompone nt and can be
exposed to COM clients and .NET clients.
Check: http://msdn.microsoft.com/library/de...ponents.aspfor details:Willy.
Yes it's true there is no direct support for building COM components, but
there is a rich interop layer in .NET which allows communication in both
directions between .NET and COM components (albeit with a few limitations
and perhaps performance overhead compared with pure COM).
Some links here covering basic principles: http://msdn.microsoft.com/vstudio/us...p/default.aspx
There is also COM+/EnterpriseServi ces, which provides another attractive
alternative for integrating with COM (especially looking forward to
"Longhorn/Indigo").
Take a look at System.Enterpri seServices namespace in the .NET framework.
As for terminology - roughly speaking COM+MTS became COM+ which became
component-services/enterprise-services in today's terminology.
Thank you very much. Jason had me a little worried for a second there...
glenn
"glenn" <gh******@softe ksoftware.com> wrote in message
news:eX******** ******@TK2MSFTN GP10.phx.gbl... How do you write a COM server in C# VS 2003? I can't believe it but I
can't even find the words COM in the help for VS related to COM servers. Did
Microsoft Rename it again or can VS C# not handle the task? Why is there
nothing available for me to read?
Thanks,
glenn
How much of a performance hit? I am use to writing my COM servers in
Borland Delphi. Are my components written in C# going to be drastically
slower?
Thanks,
glenn
"richlm" <ri****@nospam. nospam> wrote in message
news:ej******** ******@TK2MSFTN GP09.phx.gbl... Yes it's true there is no direct support for building COM components, but
there is a rich interop layer in .NET which allows communication in both
directions between .NET and COM components (albeit with a few limitations
and perhaps performance overhead compared with pure COM).
Some links here covering basic principles:
http://msdn.microsoft.com/vstudio/us...p/default.aspx
There is also COM+/EnterpriseServi ces, which provides another attractive
alternative for integrating with COM (especially looking forward to
"Longhorn/Indigo").
Take a look at System.Enterpri seServices namespace in the .NET framework.
As for terminology - roughly speaking COM+MTS became COM+ which became
component-services/enterprise-services in today's terminology.
> How much of a performance hit? I am use to writing my COM servers in Borland Delphi. Are my components written in C# going to be drastically
slower?
Here are my thoughts:
1 - You could continue using Delphi to write your COMs
2 - C# + COM => Interop call. This can be very expensive if there are
many many calls!
--
---------------------------------------------- http://michael.moreno.free.fr/
Problem is I would eventually like to get to a single programming language
for this project. I don't want to have to continue to program in 2
languages and as it stands its starting to look like Delphi might be the
best choice. It seems to generate much faster code, has a much better IDE
with lots more components, manages code a lot better, and the data access
elements of the language are far better designed and thought out than it
appears have been done in VS2003. One reason I'm holding off is I want to
see if any of these items have been addressed in VS2005 but I have no idea
how long that wait is going to be.
And it also sounds like the COM elements of it are going to be the same
which means any interfaces I write that I need to share with other companies
are going to run much slower than if written in Delphi.
This is very disappointing.. .
glenn
"Michael Moreno" <ab*@abc.abc> wrote in message
news:mn******** *************** @abc.abc... How much of a performance hit? I am use to writing my COM servers in
Borland Delphi. Are my components written in C# going to be drastically
slower?
Here are my thoughts:
1 - You could continue using Delphi to write your COMs
2 - C# + COM => Interop call. This can be very expensive if there are
many many calls!
--
----------------------------------------------
http://michael.moreno.free.fr/
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