Re: Write class/struct object to file

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Hi Samuel\Steven,

Yes, I am trying to match the format used by another application. So,
for that I don't think that Binary Serialization will do.

Well I thought .NET made everything easy...but to do this...its
difficult.

Regards,
Ashutosh

Steven Cheng[MSFT] wrote:
Thanks for Sam's input.

Hi Ashutosh,

In .net framework, the code can not directly access memory which is totally different from c/c++. That means you can not write out class/struct objects into memory/file through their point/address. If you want to persist some class objects into memory or file(in binary format), you can use the Binary Serialization feature as Sam suggested.

To do binary serialziation on class, you need to first make the certain class serializable and then use Binary Serializer to serialize the instances of those classes. You can serialize them into memoryStream or fileStream.

Here are some articles introducing .net binary serialization:

#Binary Serialization
http://msdn2.microsoft.com/en-us/library/72hyey7b(VS.71).aspx

#Run-time Serialization http://msdn.microsoft.com/msdnmag/issues/02/04/net/

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead



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--------------------
From: Samuel R. Neff <samuelneff@xxxxxxxxxx>
Subject: Re: Write class/struct object to file
Date: Fri, 25 Jan 2008 17:20:54 -0500


Are you trying to match a format used by another application or simply
store a class/struct as binary data? If the latter, then
BinaryFormatter to Serialize/Deserialize the object to/form the
stream.

HTH,

Sam

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On Sat, 19 Jan 2008 02:29:29 +0530, "Ashutosh"
<smbs_user@xxxxxxxxxxxxxxxx> wrote:

Hi,
How can I create a fixed size class or structure which consist of members
of
any types and strings of fixed (specified) sizes. I need to write the
class
object by using a BinaryStream....

I need to keep the code fully managed. I tried to declare the
array/string
of fixed size, but the compiler says to make to code unmanaged/unsafe or
use
Marshal attributes. I know how to use those attributes, but as far as I think they doesn't make sense here...

Actually I am looking for something similar to this in C++
---------------------------------------------------------
CFile f;
f.Open(....);

struct someStruct s1;

f.Write((char*)&s1,sizeof(s1));
---------------------------------------------------------
Any ideas how I can achieve the same in C# with minimal effort?

Regards,
Ashutosh



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