如何将C＃Struct转换为字节数组 [英] How to convert C# Struct to Byte Array

问题描述

我有结构：

Hi, I have structure :

struct StartReadXML
       {
           public int CmdID;//3
           public char[] CmdName;//ReadXML
           public char[] Description;

       };

初始化如下：

StartReadXML startXML = new StartReadXML（）;

startXML.CmdID = 3;

var charCmdName =s.ToCharArray（）;

startXML.CmdName =s.ToCharArray（）;

startXML.Description =p.ToCharArray（）;

现在，我想将它分配给一个字节数组。使用编组如下所示：

With initializations as below :
StartReadXML startXML=new StartReadXML();
startXML.CmdID = 3;
var charCmdName = "s".ToCharArray();
startXML.CmdName = "s".ToCharArray();
startXML.Description = "p".ToCharArray();
Now, I want it to be assigned to a byte array. Which am doing using marshalling as below:

int sizestartXML = Marshal.SizeOf(startXML);//Get size of struct data
            byte[] startXML_buf = new byte[sizestartXML];//declare byte array and initialize its size
            IntPtr ptr = Marshal.AllocHGlobal(sizestartXML);//pointer to byte array

            Marshal.StructureToPtr(startXML, ptr, true);
            Marshal.Copy(ptr, startXML_buf, 0, sizestartXML);
            Marshal.FreeHGlobal(ptr);

            //Sending struct data  packet
            stm.Write(startXML_buf, 0, startXML_buf.Length);//Modified

但是，它在Structuretoptr转换方法失败了。请帮助将结构数据转换为使用上述步骤的字节。

提前谢谢:) !!

But, it fails at Structuretoptr conversion method. Please help in transferring the struct data as bytes for which am using above steps.
Thanks in advance :) !!

推荐答案

看看这个。



如何在C＃中将结构转换为字节数组？ [ ^ ]

感谢您的帮助:)！ />
这个对我有用

Thanks for your help :)!
This one worked for me

[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 100)]

如下：

as below:

struct StartReadXML
        {
            public int CmdID;//3
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 50)]
            public string CmdName;//ReadXML
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 50)]
            public string Description;//Data to be sent
        };

和

and

StartReadXML startXML=new StartReadXML();
            startXML.CmdID = 3;
            //var charCmdName = "s".ToCharArray();            
            startXML.CmdName = "Sree";
            startXML.Description = "test";

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