C# 通訊時字節流和結構體互轉

//轉換C#代碼：

//結構體轉換成字節流
public static byte[] StructToBytes<T>(T obj)
    {
int size = Marshal.SizeOf(typeof(T));
   IntPtr bufferPtr = Marshal.AllocHGlobal(size);
try

{
       Marshal.StructureToPtr(obj, bufferPtr, false);
       byte[] bytes = new byte[size];
       Marshal.Copy(bufferPtr, bytes, 0, size);

   return bytes;

}
        catch(Exception ex)
        {
            throw new Exception("Error in StructToBytes ! " + ex.Message);
        }
finally

{

  Marshal.FreeHGlobal(bufferPtr);

}

    }
//字節流轉換成結構體

public static T BytesToStruct<T>(byte[] bytes, int startIndex = 0)
{
    if (bytes == null) return default(T);
    if (bytes.Length <= 0) return default(T);

int objLength = Marshal.SizeOf(typeof(T));
        IntPtr bufferPtr = Marshal.AllocHGlobal(objLength);
        try//struct_bytes轉換
        {
            Marshal.Copy(bytes, startIndex, bufferPtr, objLength);
            return (T)Marshal.PtrToStructure(bufferPtr, typeof(T));
        }
        catch(Exception ex)
        {
            throw new Exception("Error in BytesToStruct ! " + ex.Message);
        }
        finally
        {
            Marshal.FreeHGlobal(bufferPtr);
        }
    }
[StructLayout(LayoutKind.Sequential, Pack=1)]  //變量在內存中的對齊方式 
public struct LolMsgHeader
{
public ushort wMsgLen;
public byte    header_ver;
public ushort  uAction; //動作行為
public uint  dwUid; //用戶ID
public uint dwSeq; //包的序列號
public uint  dwPid; //當前服務ID
};
public struct LOLMoveMsg
{
[MarshalAs(UnmanagedType.SysUInt, SizeConst = LOLMsgConst.MASK_LEN)]
public WORD        mask;                   // 掩碼
[MarshalAs(UnmanagedType.ByValArray, SizeConst = LOLMsgConst.NAME_LEN)]
public byte[] szName;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = LOLMsgConst.NAME_LEN)]
public string targetName; //目的對象
public short x;
public short y;
public byte byReached; //到達目的地，未到達0，到達1
};
//注意，之前遇到過在ios真機上運行不起來的bug，在android真機和ios模擬器上都是OK的問題，
后來把所有的ByValArray改成ByValTStr解決了這個問題。
如果有可能，建議不要用數組，全部都用基本類型。</pre>