Managed C++/CLI

Nish Nishant13-Jun-02 22:36

13-Jun-02 22:36

James T. Johnson wrote:
I have P/Invoke

James T. Johnson wrote:
create an assembly in MC++

Why go to all that bother just to do C#? What's so appealing about it?

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

James T. Johnson13-Jun-02 22:44

13-Jun-02 22:44

For .NET code its a lot cleaner to me. You need to be aware of a few performance tweaks (such as avoiding unnecessary boxing) but over all the syntax is much better.

Which of these do you prefer?
MC++

ptr = *dynamic_cast<__box System::IntPtr*>(arlist->Item[index]);

or this

C#

ptr = (IntPtr) arlist[index]

However, the code I sent you the other day would convince me to switch to MC++ in a heart beat Cool | :cool:

James

Nish Nishant13-Jun-02 23:07

13-Jun-02 23:07

James T. Johnson wrote:
However, the code I sent you the other day would convince me to switch to MC++ in a heart beat

Yeah. That was cool Smile | :)

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Nish Nishant13-Jun-02 22:18

13-Jun-02 22:18

Michael P Butler wrote:
What advantages do we get for doing UI code in MC++ compared to doing it in C# ?

None except personal preference. Basically anything you do in C# can be one-to-one mapped in VB .NET

But still lot of people don't do VB .NET.

Similarly some only do VB .NET.

And I prefer MC++.

And I can tell you that it's a cool feeling when you can use an MFC CString alongside a .NET String in the same source file. You cannot do that with C# or VB .NET, can you?

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Rocky Moore13-Jun-02 23:20

Rocky Moore

13-Jun-02 23:20

Nish - Native CPian wrote:
And I can tell you that it's a cool feeling when you can use an MFC CString alongside a .NET String in the same source file. You cannot do that with C# or VB .NET, can you?

Actually, isn't that an ATL string [in] MFC [in] .NET Wink | ;)

Rocky Moore

Nish Nishant13-Jun-02 23:27

Re: Indexers, MC++ and C#

13-Jun-02 23:27

Rocky Moore wrote:
Actually, isn't that an ATL string [in] MFC [in] .NET

Yes it is Big Grin | :-D

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Indexers, MC++ and C#

sultan_of_6string13-Jun-02 19:01

sultan_of_6string

13-Jun-02 19:01

Hi!

I'm writing a cross-platform app using the .NET framework. The bulk of my program is in C# but for performance reasons, I'm had to implement a bit in Managed C++.

My Managed C++ .dll includes a class that implements the IList interface:

...
__property virtual bool get_IsReadOnly();
__property virtual Object* get_Item(int index);
__property virtual void set_Item(int index, Object* value);
virtual int Add(Object* value);
etc.

So, the get_Item/set_Item properties above appear as the Item property in VB.NET and MC++. In C#, it should appear as an indexer (object this[int index]). However, what I get is two methods called get_Item and set_Item.

What's wrong?

Nish Nishant13-Jun-02 19:11

Re: Indexers, MC++ and C#

13-Jun-02 19:11

This problem has been reported a few days ago in this same forum by someone else. Apparently MC++ collections are not accessible through C# indexers.

I haven't tried it out yet.

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

James T. Johnson13-Jun-02 22:02

Re: Indexers, MC++ and C#

13-Jun-02 22:02

Its not just MC++ collections that can't be accessible through C# indexers; its that MC++ indexers don't come up in C# as indexers.

I can't figure out why that is; because I haven't looked into it much; maybe I'll revisit that issue now Smile | :)

James

Nish Nishant13-Jun-02 22:34

Very slow debug startup when debugging mc++ mixed app

13-Jun-02 22:34

James T. Johnson wrote:
Its not just MC++ collections that can't be accessible through C# indexers; its that MC++ indexers don't come up in C# as indexers.

I can't figure out why that is; because I haven't looked into it much; maybe I'll revisit that issue now

Puzzling!!!

Nish Suspicious | :suss:

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Chris Hafey8-Jun-02 18:56

Chris Hafey

8-Jun-02 18:56

It takes the debugger about 10 seconds to start up when debugging mixed managed and unmanaged C++ code. If I set the debugger to "managed only", the application is launched in less than one second. I noticed that the network is very busy during the launching of the debugger when in mixed mode - is there something I can change to get mixed mode debugging to startup faster? Thanks

Chris Hafey

Re: Very slow debug startup when debugging mc++ mixed app

Nish Nishant8-Jun-02 19:35

Re: Very slow debug startup when debugging mc++ mixed app

8-Jun-02 19:35

I have had the same problem. When mixing managed and unmanaged code the debugger is super slow. Sometimes I get so fed up I use Ctrl-F5 and run it non-debugged

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Brandon Parker13-Jun-02 7:26

Brandon Parker

13-Jun-02 7:26

I hear you. I am soooo sick of this. I need to find a computer running dual processors!!! Cry | :((

Re: Very slow debug startup when debugging mc++ mixed app

Nish Nishant13-Jun-02 8:30

13-Jun-02 8:30

Brandon Parker wrote:
find a computer running dual processors!!!

I was thinking quad P IV with 2GB RAM

Nish Frown | :-(

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Indexers

Michael Mac8-Jun-02 9:12

8-Jun-02 9:12

I'm writting an app in MC++. One of its class is a collection and I don't know what to do to have indexers in C#.

When I disassemble C# code the indexer function is as follow:

get_Item : class System.String(int32)

I tried to add function like this but I didn't work. Cry | :((

Can somebody tell if it's possible.

James T. Johnson8-Jun-02 10:38

8-Jun-02 10:38

Create a property called Item which takes a common parameter in both its set/get functions. ie

__property System::String* get_Item(int index)
{ 
  ....
}
 
__property void set_Item(int index, System::String* value)
{
  ....
}

I don't see anything that lets you create a C# indexer were the class instance can be treated as an array; I assume if you use the Item property name it allows C# to use it as if it were one.

HTH,

James

Michael Mac8-Jun-02 11:14

8-Jun-02 11:14

I don't work.

C++ function disassembly is

.method public specialname instance string 
        get_Item(int32 index) cil managed

and C# is

.method public hidebysig specialname instance string 
        get_Item(int32 index) cil managed

Mayby it's possible to write this function in CLR?

James T. Johnson8-Jun-02 15:14

8-Jun-02 15:14

It appears Indexers created in MC++ only work in MC++ AND you can't create an indexer that operates on a class instance.

I'll look into it more after the hockey game Smile | :)

James

Michael Mac8-Jun-02 21:03

A problem with serializtion

8-Jun-02 21:03

I'll appreciate it. Smile | :)

Thanks

Michael Mac8-Jun-02 1:33

8-Jun-02 1:33

I want to serialize using xml a class which contains a IPEndPoint field. I can't get it to work. Does anybody know what to do? But I don't want to use other formatter. Help!!! Please. Cry | :((

public class __gc Message
{
public:
   __property Byte get_ByteMessage ( )[] { return m_byteMessage; }
   __property void set_ByteMessage ( Byte byteMessage[] ) { m_byteMessage = byteMessage; }
   __property IPEndPoint* get_Sender ( ) { return m_ipeEndPoint; }
private:
   Byte m_byteMessage[];   
   IPEndPoint* m_ipeEndPoint;
}

Nish Nishant8-Jun-02 1:51

8-Jun-02 1:51

Is IPEndPoint a serializable class? If not it won;t get serialized. Not automatically. Not sure of this, but if you can derive another class from IPEndPoint, and then add the serialization stuff, it just might work. Not very sure about it though, as I already said Smile | :)

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Michael Mac8-Jun-02 2:12

8-Jun-02 2:12

IPEndPoint is a serializable class. In addition, I can't even serialize IPEndPoint itself using xml of course.

m_xmlsSerializer = new XmlSerializer( __typeof ( IPEndPoint) );
// an error with message "There was an error reflecting 'System.Net.IPEndPoint'.

Any other ideas?
Cry | :((

Rama Krishna Vavilala13-Jun-02 12:58

Rama Krishna Vavilala

13-Jun-02 12:58

Michael Mac wrote:
I can't even serialize IPEndPoint itself using xml of course.

Does it have a public constructor? The exception normally gives the detail reason of what is missing from the class

Michael Mac13-Jun-02 22:04

13-Jun-02 22:04

The code shown below

XmlSerializer* xml = new XmlSerializer ( __typeof( IPEndPoint ) );

returns an exception with the message: "There was an error reflecting 'System.Net.IPEndPoint'".
So I think it's impossible to serialize IPEndPoint class using XML. The alternatives are BinaryFormatter and SoapFormatter.

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James T. Johnson13-Jun-02 22:13