C#中结构的字节序列化字节

本文介绍了C#中结构的字节序列化字节的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在寻找 C# 中序列化的语言支持.我可以从 ISerializable 派生并通过复制字节缓冲区中的成员值来实现序列化.但是，我更喜欢一种更自动化的方式，就像在 C/C++ 中可以做到的那样.

I'm looking for language support of serialization in C#. I could derive from ISerializable and implement the serialization by copying member values in a byte buffer. However, I would prefer a more automatic way like one could do in C/C++.

考虑以下代码:

using System; using System.Text; using System.Runtime.Serialization; using System.Runtime.Serialization.Formatters.Binary; using System.IO; namespace XBeeHelper { class XBee { [Serializable()] public struct Frame<FrameType> where FrameType : struct { public Byte StartDelimiter; public UInt16 Lenght; public Byte APIIdentifier; public FrameType FrameData; public Byte Checksum; } [Serializable()] public struct ModemStatus { public Byte Status; } public Byte[] TestSerialization() { Frame<ModemStatus> frame = new Frame<ModemStatus>(); frame.StartDelimiter = 1; frame.Lenght = 2; frame.APIIdentifier = 3; frame.FrameData.Status = 4; frame.Checksum = 5; BinaryFormatter formatter = new BinaryFormatter(); MemoryStream stream = new MemoryStream(); formatter.Serialize(stream, frame); Byte[] buffer = stream.ToArray(); return buffer; } } }

我有一个通用的 Frame 结构，它充当多种类型的有效载荷的包装器，用于串行传输.ModemStatus 就是此类负载的一个示例.

I have a generic Frame struct acting as a wrapper for many types of payload, for serial transmission. ModemStatus is an example of such payload.

但是，运行 TestSerialization() 会返回一个 382 字节长的缓冲区(没有预期的内容)！它应该包含 6 个字节.是否可以在不手动序列化的情况下正确序列化这些数据?

However, running TestSerialization() returns a buffer 382 bytes long (without the expected content)! It should have contained 6 bytes. Is it possible to serialize this data correctly without manual serializing?

推荐答案

就用这两个方法:

public static class StructTools { /// <summary> /// converts byte[] to struct /// </summary> public static T RawDeserialize<T>(byte[] rawData, int position) { int rawsize = Marshal.SizeOf(typeof(T)); if (rawsize > rawData.Length - position) throw new ArgumentException("Not enough data to fill struct. Array length from position: "+(rawData.Length-position) + ", Struct length: "+rawsize); IntPtr buffer = Marshal.AllocHGlobal(rawsize); Marshal.Copy(rawData, position, buffer, rawsize); T retobj = (T)Marshal.PtrToStructure(buffer, typeof(T)); Marshal.FreeHGlobal(buffer); return retobj; } /// <summary> /// converts a struct to byte[] /// </summary> 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; } }

并像这样指定您的结构(指定确切的大小并按一个字节打包(对齐).默认为 8):

And specify your struct like this (Specify the exact size and pack (align) by one byte. default is 8):

[StructLayout(LayoutKind.Explicit, Size = 11, Pack = 1)] private struct MyStructType { [FieldOffset(0)] public UInt16 Type; [FieldOffset(2)] public Byte DeviceNumber; [FieldOffset(3)] public UInt32 TableVersion; [FieldOffset(7)] public UInt32 SerialNumber; }

现在您可以使用

StructTools.RawDeserialize<MyStructType>(byteArray, 0); // 0 is offset in byte[]

并使用

StructTools.RawSerialize(myStruct);