from byte[] to structure

[Ben Terry]

Can anyone tell me how to get data from a byte array into the following
structure?

[Serializable]
[StructLayout(La youtKind.Sequen tial)]
public struct MESSAGE_LOG_HEA DER_STRUCT2
{
public DateTime dtTimeStamp;
public Int32 dSerialNumber;
[MarshalAs(Unman agedType.ByValA rray, SizeConst=8)]
public byte[] strMCFirmwareVe rsion;
public Int32 dMCFirmwareChec ksum;
[MarshalAs(Unman agedType.ByValA rray, SizeConst=8)]
public byte[] strSBCSoftwareV ersion;
public Int32 dSBCSoftwareChe cksum;
[MarshalAs(Unman agedType.ByValA rray, SizeConst=32)]
public byte[] strBarcode;
}

I have tried the following code, but I get the exception "BinaryFormatte r
Version incompatibility ." when it executes.

MemoryStream ms = new MemoryStream(by tes); // bytes is a byte[]
BinaryFormatter bf = new BinaryFormatter ();
m_CompleteIllum StateMsg = (MIX_CompleteIl lumStateMsg)bf. Deserialize(ms) ; //
m_CompleteIllum StateMsg is a MESSAGE_LOG_HEA DER_STRUCT2

[Lars Wilhelmsen]

Re: from byte[] to structure

Hi Ben,

"Ben Terry" <bt@charter.net > wrote in message
news:u7fE1kRaEH A.3752@TK2MSFTN GP12.phx.gbl...[color=blue]
> Can anyone tell me how to get data from a byte array into the following
> structure?
>[/color]

Feel free to use this method:

public static object RawDeserialize( byte[] rawData, int position, Type
anyType )
{
int rawsize = Marshal.SizeOf( anyType );
if( rawsize > rawData.Length )
return null;
IntPtr buffer = Marshal.AllocHG lobal( rawsize );
Marshal.Copy( rawData, position, buffer, rawsize );
object retobj = Marshal.PtrToSt ructure( buffer, anyType );
Marshal.FreeHGl obal( buffer );
return retobj;
}

the position is the position into the byte array to start deserializing
from, and the
type is the type of the structure - typof(MESSAGE_L OG_HEADER_STRUC T2).
Remember to cast the return value to the same type too.

And if you want to do vice versa, use this one:

public static byte[] RawSerialize( object anything )
{
int rawSize = Marshal.SizeOf( anything );
IntPtr buffer = Marshal.AllocHG lobal( rawSize );
Marshal.Structu reToPtr( anything, buffer, false );
byte[] rawDatas = new byte[ rawSize ];
Marshal.Copy( buffer, rawDatas, 0, rawSize );
Marshal.FreeHGl obal( buffer );
return rawDatas;
}

--
Lars Wilhelmsen

http://www.sral.org/

Software Engineer
Teleplan A/S, Norway

[Ben Terry]

Re: from byte[] to structure

Excellent! Thank you so much.

"Lars Wilhelmsen" <larswil@NOSPAM .ifi.uio.no> wrote in message
news:uVgLbqRaEH A.996@TK2MSFTNG P12.phx.gbl...[color=blue]
> Hi Ben,
>
> "Ben Terry" <bt@charter.net > wrote in message
> news:u7fE1kRaEH A.3752@TK2MSFTN GP12.phx.gbl...[color=green]
> > Can anyone tell me how to get data from a byte array into the following
> > structure?
> >[/color]
>
> Feel free to use this method:
>
> public static object RawDeserialize( byte[] rawData, int position, Type
> anyType )
> {
> int rawsize = Marshal.SizeOf( anyType );
> if( rawsize > rawData.Length )
> return null;
> IntPtr buffer = Marshal.AllocHG lobal( rawsize );
> Marshal.Copy( rawData, position, buffer, rawsize );
> object retobj = Marshal.PtrToSt ructure( buffer, anyType );
> Marshal.FreeHGl obal( buffer );
> return retobj;
> }
>
> the position is the position into the byte array to start deserializing
> from, and the
> type is the type of the structure - typof(MESSAGE_L OG_HEADER_STRUC T2).
> Remember to cast the return value to the same type too.
>
> And if you want to do vice versa, use this one:
>
> public static byte[] RawSerialize( object anything )
> {
> int rawSize = Marshal.SizeOf( anything );
> IntPtr buffer = Marshal.AllocHG lobal( rawSize );
> Marshal.Structu reToPtr( anything, buffer, false );
> byte[] rawDatas = new byte[ rawSize ];
> Marshal.Copy( buffer, rawDatas, 0, rawSize );
> Marshal.FreeHGl obal( buffer );
> return rawDatas;
> }
>
> --
> Lars Wilhelmsen
> http://www.sral.org/
> Software Engineer
> Teleplan A/S, Norway
>
>[/color]

[BMermuys]

Re: from byte[] to structure

Hi,


public YourStruct BytesToStruct(b yte[] dataIn)
{
GCHandle hDataIn = GCHandle.Alloc( dataIn, GCHandleType.Pi nned);
YourStruct ys =
(YourStruct)Mar shal.PtrToStruc ture(hDataIn.Ad drOfPinnedObjec t(),
typeof(YourStru ct));
hDataIn.Free();
return ys;
}

HTH,
greetings


"Ben Terry" <bt@charter.net > wrote in message
news:u7fE1kRaEH A.3752@TK2MSFTN GP12.phx.gbl...[color=blue]
> Can anyone tell me how to get data from a byte array into the following
> structure?
>
> [Serializable]
> [StructLayout(La youtKind.Sequen tial)]
> public struct MESSAGE_LOG_HEA DER_STRUCT2
> {
> public DateTime dtTimeStamp;
> public Int32 dSerialNumber;
> [MarshalAs(Unman agedType.ByValA rray, SizeConst=8)]
> public byte[] strMCFirmwareVe rsion;
> public Int32 dMCFirmwareChec ksum;
> [MarshalAs(Unman agedType.ByValA rray, SizeConst=8)]
> public byte[] strSBCSoftwareV ersion;
> public Int32 dSBCSoftwareChe cksum;
> [MarshalAs(Unman agedType.ByValA rray, SizeConst=32)]
> public byte[] strBarcode;
> }
>
> I have tried the following code, but I get the exception "BinaryFormatte r
> Version incompatibility ." when it executes.
>
> MemoryStream ms = new MemoryStream(by tes); // bytes is a byte[]
> BinaryFormatter bf = new BinaryFormatter ();
> m_CompleteIllum StateMsg = (MIX_CompleteIl lumStateMsg)bf. Deserialize(ms) ;[/color]
//[color=blue]
> m_CompleteIllum StateMsg is a MESSAGE_LOG_HEA DER_STRUCT2
>
>[/color]