封送和拆封 [英] marshaling and unmarshaling

问题描述

我是csharp的新手，如何将c结构编组为c Sharp.

任何机构都可以发送示例文件

hi ,

i am new to csharp how to marshal the c structures into c sharp.

any body send the document of examples

public byte[] StructureToByte(object objStructure, int iLength)
        {
            byte[] destination = new byte[iLength];
            IntPtr ptr = Marshal.AllocHGlobal(iLength);
            Marshal.StructureToPtr(objStructure, ptr, true);
            Marshal.Copy(ptr, destination, 0, iLength);
            Marshal.FreeHGlobal(ptr);
            return destination;
        }

StructureToByte转换的目的是什么.

祝你有美好的一天.

问候
Naga

what is the purpose of StructureToByte convertion.

have a nice day.

regards
Naga

推荐答案

Internet上有很多有关编组的文章和教程.例如这个:
http://www.c-sharpcorner.com/UploadFile/GemingLeader/617/ [ ^ ]

封送处理是将托管内存转换为本地内存(或将本地内存转换为托管内存)的过程，以便.NET应用程序可以与本地应用程序交换数据.

您的函数StructureToByte将托管结构转换为字节数组.然后可以将此字节数组发送到例如本机DLL.您可以将托管结构直接发送到本机DLL，因为它位于托管内存中(无法从本机代码访问).

There are lots of articles and tutorials on internet about marshaling. for example this one:
http://www.c-sharpcorner.com/UploadFile/GemingLeader/617/[^]

Marshaling is the process of translating managed memory into native memory (or native memory to managed memory) so that .NET applications can exchange data with native applications.

Your function StructureToByte converts a managed structure into a byte array. This byte array can then be sent to a native DLL for example. You can send the managed structure directly to the native DLL because it resides in managed memory (not accessible from native code).

谢谢您的答复.

我需要编写结构，并编写示例，如果它是写的或错误的，请检查它.

要求:

消息类型long(4)
MessageTag Long(4)
Tcode Char(7)
密码unsignedcahr(16)
保留的字符

结构的解决方案:

[StructLayout(LayoutKind.Sequential，Pack = 1)]
公共结构样本
{

[MarshalAs(UnmanagedType.U4)]
公共uint MessageType;
[MarshalAs(UnmanagedType.U4)]
公共uint MessageTag;
[MarshalAs(UnmanagedType.ByValTStr，SizeConst = 7)]
公共字符串代码；
[MarshalAs(UnmanagedType.ByValTStr，SizeConst = 16)]
公用字符串sPassword;
[MarshalAs(UnmanagedType.I1)]
public char cReserved;
}

我的疑问是正确的，还是不是
[MarshalAs(UnmanagedType.U4)]
公共uint MessageType;
[MarshalAs(UnmanagedType.U4)]
公共ulong MessageType;


请发回您的反馈.

谢谢
naga

hi thanks for your reply.

i have need to write the structure and i wrote the sample , if it is write or wrong please check it.

Requirement:

Messagetype long(4)
MessageTag Long(4)
Tcode Char(7)
Password unsignedcahr(16)
Reserved char

Solution of Structure:

[StructLayout(LayoutKind.Sequential, Pack = 1 )]
public struct sample
{

[MarshalAs(UnmanagedType.U4)]
public uint MessageType;
[MarshalAs(UnmanagedType.U4)]
public uint MessageTag;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 7)]
public string Code;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string sPassword;
[MarshalAs(UnmanagedType.I1)]
public char cReserved;
}

My doubt is it correct or instead of
[MarshalAs(UnmanagedType.U4)]
public uint MessageType;
[MarshalAs(UnmanagedType.U4)]
public ulong MessageType;


please send your feed back .

thanks
naga

与该问题有关的另一篇文章，

使用C#/ [

Another article related to the question,

Mastering structs in C#/[^]

:)

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