[C#] 구조체 마샬링

Serializable : 문자로 변환하기 위해서 선언

StructLayout(LayoutKind.Sequential) : 구조체 선언

Pack=1 : pack(데이터를 읽을 단위를 정함)

MarshalAs(UnmanagedType.ByValArray, SizeConst = 배열수)

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[Serializable] [StructLayout(LayoutKind.Sequential, Pack=1)] public struct _HMIData {     public _hmi_macsta hmi_macsta } [Serializable] [StructLayout(LayoutKind.Sequential, Pack=1)] public struct _hmi_macsta {     [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1100]     public short[] oth_sta;     [MarshalAs(UnmanagedType.ByValArray, SizeConst = 298)]     public short[] bcdv_sta1;     [MarshalAs(UnmanagedType.ByValArray, SizeConst = 298)]     public short[] bcdv_sta2;     [MarshalAs(UnmanagedType.ByValTStr, SizeConst= 15)]     public string start_time; }

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public partial class ShmDataView : Form {     public _HMIData HMIData;     public int ShmStructSize;     public byte[] HMIBuffer;   public ShmDataView()     {         InitializeComponent();         InitHMIData();     }       private void InitHMIData()     {         HMIData = new _HMIData();         ShmStructSize = Marshal.SizeOf(HMIData);         HMIBuffer = new byte[ShmStructSize];     HMIData = (_HMIData)RawDeSerialize(HMIBuffer, HMIData.GetType());     }         public byte[] RawSerialize(object ShmStruct)     {         IntPtr buffer = Marshal.AllocHGlobal(ShmStructSize);         Marshal.StructureToPtr(HMIData, buffer, false);         byte[] RawData = new byte[ShmStructSize];         Marshal.Copy(buffer, RawData, 0, ShmStructSize);         Marshal.FreeHGlobal(buffer);         return RawData;     }       public object RawDeSerialize(byte[] RawData, Type ShmData)     {         int RawSize = Marshal.SizeOf(ShmData);           //Size Over         if (RawSize > RawData.Length)         {             return null;         }           IntPtr buffer = Marshal.AllocHGlobal(RawSize);         Marshal.Copy(RawData, 0, buffer, RawSize);         object retobj = Marshal.PtrToStructure(buffer, ShmData);         Marshal.FreeHGlobal(buffer);         return retobj;     } }

public byte[] RawSerialize(object ShmStruct) 구조체로 되어있는 내용을 byte배열로 만듬

public object RawDeSerialize(byte[] RawData, Type ShmData) byte배열로 되어있는 것을 구조체(object)로 반환

그냥 sizeof를 하면 나오지 않는다.

Marshal.SizeOf(객체) 로 해야 C언어의 sizeof(구조체)와 같은 형태가 나온다