MBR IT/.NET 247 : C# and Byte Stream on microsoft.public.dotnet.framework.interop

C# and Byte Stream

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Jeff

Hello,

I have a socket connection to an unmanged application. Application
messages arrive as a stream of bytes that get added to a byte array.

The structures that define these messages are defined in a C/C++ header
file.

I would like to use managed C++ to expose a Message object to a C#
application.

For example:

byte[] rawMsg = Socket.Read( );
//Call Manged C++ constructor
AppMessage appMsg = new AppMessage(rawMsg);
int value = appMsg.GetValue( );

---------------------------------------------

Does anyone know where I could find code snips and/or
articles that would get me started?

Thanks, Jeff

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Peter Huang (VIP)

Hi Jeff,

Why not redefine the C++ structure in the C# which will save a lot of job
to do the interop.
Also here is a sample you may take a look.
[MCPP]
typedef struct TestSC
{
    int i;
    int j;
}SCC;

using namespace System;
using namespace System::Runtime::InteropServices;
namespace TestMCPPMC
{
    public __gc class TestClass
    {

    public:
        int i;
        int j;
        TestClass(Byte bts[])
        {
            SCC tx;
            IntPtr pTs=(IntPtr)&tx;
            Marshal::Copy(bts,0,pTs,sizeof(SCC));
            i = tx.i;
            j = tx.j;
        }
    };
}

[C#]
        [STAThread]
        static void Main(string[] args)
        {
            byte[] bts = new byte[8];
            bts[0] = 1;
            bts[4] = 1;
            TestMCPPMC.TestClass tc = new TestMCPPMC.TestClass(bts);
            System.Diagnostics.Debug.WriteLine(tc.i);
            System.Diagnostics.Debug.WriteLine(tc.j);
        }

Best regards,

Peter Huang
Microsoft Online Partner Support

Get Secure! - www.microsoft.com/security
This posting is provided "AS IS" with no warranties, and confers no rights.

Reply to this message...

Jeff

Hi Peter,

Your MCPP sample code seems to work well for me.

Thanks again for your help,

Jeff

Reply to this message...

Peter Huang (VIP)

Hi Jeff,

I am glad that my suggestion is of help, if you still have any concern,
please feel free to post here.

Best regards,

Peter Huang
Microsoft Online Partner Support

Get Secure! - www.microsoft.com/security
This posting is provided "AS IS" with no warranties, and confers no rights.

Reply to this message...

Jeff

Hi Peter,

I'll try your MC++ sample code.

Thanks again, Jeff

Reply to this message...

	System.Diagnostics.Debug
	System.IntPtr
	System.Net.Sockets.Socket

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