Structures question.

[Guest]

Hi,

I'm deveoping a Client/Server application.
I want to send information by using structures.
I want to have a standard header structure, and variable lenght
data.
for example,
---------------------------------------
public struct Header
{
public int sequenceNumber;
public int serviceRequest ;
----
----
}

public struct Info
{
Header head;
byte[] data;
}
-------------------------------
How do we marshal "Info" structure with variable byte[] data.
Currently I'm marshalling in the following way,

[MarshalAs( UnmanagedType.ByValArray, SizeConst= 1024)]
byte[] data;

but as the data should be of variable length, how can we marshal the byte[]
without specifying the size of the byte[]. I mean is there any way that we
can
find the size of the byte[] just before marshalling the sturcture "Info".

Kindly let me know,

Cheers,

Naveen.

 

[Chad Z. Hower aka Kudzu]

I'm deveoping a Client/Server application.
I want to send information by using structures.

What connection methodology are you using? SOAP? TCP? Remoting?



--
Chad Z. Hower (a.k.a. Kudzu) - http://www.hower.org/Kudzu/
"Programming is an art form that fights back"

Develop ASP.NET applications easier and in less time:
http://www.atozed.com/IntraWeb/

 

[Guest]

I'm using TCP/IP connection.

What connection methodology are you using? SOAP? TCP? Remoting?



--
Chad Z. Hower (a.k.a. Kudzu) - http://www.hower.org/Kudzu/
"Programming is an art form that fights back"

Develop ASP.NET applications easier and in less time:
http://www.atozed.com/IntraWeb/

 

[Chad Z. Hower aka Kudzu]

=?Utf-8?B?TmF2ZWVuIE11a2tlbGxp?=

I'm using TCP/IP connection.

Is there a reason you definitely want to write the structure? What about
using dataset structures and sending it over as XML?


--
Chad Z. Hower (a.k.a. Kudzu) - http://www.hower.org/Kudzu/
"Programming is an art form that fights back"

Empower ASP.NET with IntraWeb
http://www.atozed.com/IntraWeb/

 

[Guest]

Honestly speaking, I don't know how to use Dataset structures and sending them
over as XML. Could you explain in some detail please.

Actually, I'm developing a Class library(Dll) that helps Client/Server
applications.

 

[Chad Z. Hower aka Kudzu]

=?Utf-8?B?TmF2ZWVuIE11a2tlbGxp?=

Honestly speaking, I don't know how to use Dataset structures and
sending them over as XML. Could you explain in some detail please.

A good way is to create a typed dataset. Try this article, its not exactly
what you need, but I think you'll quickly get the idea of how it applies to
your situation. Datatables also supports multiple rows altough this article
does not demonstrate this.

http://www.codeproject.com/dotnet/XMLSettingsFile.asp


--
Chad Z. Hower (a.k.a. Kudzu) - http://www.hower.org/Kudzu/
"Programming is an art form that fights back"

Get your ASP.NET in gear with IntraWeb!
http://www.atozed.com/IntraWeb/

 

[sadhu]

If all you're trying is to send instances of objects over the wire, why
not serialize them and send them directly, instead of trying to marshal
yourself?

MemoryStream ms = new MemoryStream();
BinaryFormatter f = new BinaryFormatter();

f.Serialize(yourObject, ms);

byte []data = ms.ToArray();
socket.Write(data);

You can then do the reverse on the receiving side.

Regards
Senthil