将对象/结构转换为byte []而不进行序列化.我如何获得对象的大小. [英] Convert Object/Struct to byte[] without serialization. How can I get size of Object.

问题描述

你好！
1.我需要将Object或struct转换为byte [](array).
2.最近，我发现某些代码表面上可以将对象转换为字节数组.但是为此，有必要知道物体的尺寸.如何接收物体的大小?
对我而言，必须在内部使用类型为字符串"的结构！！！
提前表示感谢.

Hello!
1. I need to convert Object or struct to byte[](array).
2. Recently, I have found a certain code which ostensibly could convert object in a byte array. But for this purpose it was necessary to know the size of object. How can I receive the size of object?
It is necessary for me to use structure with type "string" inside!!!
Thankful in advance.

推荐答案

internal static StructureType ReadStructure<StructureType>(Stream Stream)
    where StructureType : struct
{
    int Length = Marshal.SizeOf(typeof(StructureType));
    byte[] Bytes = new byte[Length];
    Stream.Read(Bytes, 0, Length);
    IntPtr Handle = Marshal.AllocHGlobal(Length);
    Marshal.Copy(Bytes, 0, Handle, Length);
    StructureType Result = (StructureType)Marshal.PtrToStructure(Handle, typeof(StructureType));
    Marshal.FreeHGlobal(Handle);
    return Result;
}

internal static void WriteStructure(object Structure, Stream Stream)
{
    int Length = Marshal.SizeOf(Structure);
    byte[] Bytes = new byte[Length];
    IntPtr Handle = Marshal.AllocHGlobal(Length);
    Marshal.StructureToPtr(Structure, Handle, true);
    Marshal.Copy(Handle, Bytes, 0, Length);
    Marshal.FreeHGlobal(Handle);
    Stream.Write(Bytes, 0, Length);
}

这可能会帮助您:
http://social.msdn.microsoft.com/论坛/en-IE/clr/thread/96747ab7-7d89-4846-9e83-46f71b8ccc66 [

This might help you:
http://social.msdn.microsoft.com/Forums/en-IE/clr/thread/96747ab7-7d89-4846-9e83-46f71b8ccc66[^]

创建这样的类:

类MyClass
{
public int a;
公共字符串文本；

MyClass(){}//XmlSerializer必需的...
}
.........
.........
/*使用XmlSerializer代替使用BinaryFormatter.这个可以
即使没有标记为[Serializable]，也可以使用
序列化一个类 限制，它只会保存公共字段并进行读写
属性，并且需要默认的构造函数.*/

公共静态字节[] ObjectToByteArray(Object obj//我们的类实例
)
{
如果(obj == null)
返回null;
System.Xml.Serialization.XmlSerializer bf =新的System.Xml.Serialization.XmlSerializer(obj.GetType());
MemoryStream ms =新的MemoryStream();
bf.Serialize(ms，obj);
返回ms.ToArray();
}

享受吧！

Create class like this:

class MyClass
{
public int a;
public string text;

MyClass() { } // Necessary for XmlSerializer...
}
.........
.........
/*Instead of using a BinaryFormatter, use the XmlSerializer. This one can
serialize a class even if it is not marked as [Serializable], with the
restriction that it will only save the public fields and read-write
properties, and that it requires a default constructor.*/

public static byte[] ObjectToByteArray(Object obj//Our class instance
)
{
if (obj == null)
return null;
System.Xml.Serialization.XmlSerializer bf = new System.Xml.Serialization.XmlSerializer(obj.GetType());
MemoryStream ms = new MemoryStream();
bf.Serialize(ms, obj);
return ms.ToArray();
}

Enjoy!!!

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