do you want to convert the structure to a byte array and vice versa ?
then look into the code below
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
namespace WindowsApplication2
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Label label2;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public static byte[] RawSerialize( object anything )
{
int rawsize = Marshal.SizeOf( anything );
IntPtr buffer = Marshal.AllocHGlobal( rawsize );
Marshal.StructureToPtr( anything, buffer, false );
byte[] rawdatas = new byte[ rawsize ];
Marshal.Copy( buffer, rawdatas, 0, rawsize );
Marshal.FreeHGlobal( buffer );
return rawdatas;
}
public static object RawDeserialize( byte[] rawdatas, Type anytype )
{
int rawsize = Marshal.SizeOf( anytype );
if( rawsize rawdatas.Length )
return null;
IntPtr buffer = Marshal.AllocHGlobal( rawsize );
Marshal.Copy( rawdatas, 0, buffer, rawsize );
object retobj = Marshal.PtrToStructure( buffer, anytype );
Marshal.FreeHGlobal( buffer );
return retobj;
}
[StructLayout(LayoutKind.Sequential,Pack=1)]
public struct test
{
public byte a;
public byte b;
public byte c;
public byte d;
[MarshalAs(UnmanagedType.ByValArray, SizeConst=6)] public byte[]
Reserved;
}
[StructLayout(LayoutKind.Sequential,Pack=1)]
public struct test2
{
public byte a;
string ms;
}
// sample usage:
[StructLayout(LayoutKind.Sequential, Pack=1, CharSet=CharSet.Ansi)]
struct YourStruct
{
public Int32 First;
public Int32 Second;
[MarshalAs( UnmanagedType.ByValTStr, SizeConst=16 )]
public String Text;
}
public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.label1 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// label1
//
this.label1.Location = new System.Drawing.Point(56, 69);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(292, 28);
this.label1.TabIndex = 0;
this.label1.Text = "label1";
//
// label2
//
this.label2.Location = new System.Drawing.Point(55, 113);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(300, 23);
this.label2.TabIndex = 1;
this.label2.Text = "label2";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(430, 369);
this.Controls.Add(this.label2);
this.Controls.Add(this.label1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void Form1_Load(object sender, System.EventArgs e)
{
test mytest=new test();
mytest.a=10;
mytest.b=100;
mytest.c=210;
label1.Text=Marshal.SizeOf(mytest).ToString();
test2 mytest2=new test2();
label2.Text=Marshal.SizeOf(mytest2).ToString();
byte[] a=RawSerialize( mytest );
test mytest3=(test)RawDeserialize( a, typeof(test));
}
}
}
"Zeke Zinzul" <ze**@shambolica.demon.co.ukwrote in message
news:e8*******************@news.demon.co.uk...
Hi Guys & Geeks,
What's the most elegant way of dealing with binary data and structures?
Say I have this (which I actually do, a woo-hoo):
struct Struct_IconHeader
{
byte width;
byte height;
byte colorcount;
byte reserved;
UInt16 planes;
UInt16 bitcount;
UInt64 sizeinbytes;
UInt64 fileoffset;
}
...
more structures declared, including a master structure encompassing all
preceding structures.
Do I really have to do this:
IconData.IconHeader.width=br.ReadByte();
IconData.IconHeader.height=br.ReadByte();
IconData.IconHeader.colorcount=br.ReadByte();
IconData.IconHeader.reserved=br.ReadByte();
IconData.IconHeader.planes=br.ReadUInt16();
IconData.IconHeader.bitcount=br.ReadUInt16();
IconData.IconHeader.sizeinbytes=br.ReadUInt64();
IconData.IconHeader.fileoffset=br.ReadUInt64();
?
Is there some elegant way of just doing:
br.Read(IconData);
When I try: br.Read(IconData,0,Marshal.SizeOf(IconData));
I am getting a casting (director) error about being unable to convert blah
to chars[].
I am hoping that I am ignorant (it can be blissful) and .NET provides a
_simple_ way of reading binary data into structures.
Thank you very much,
Zeke
