C# 字节数组转结构体

（1）字节数据转结构体的函数如下所示。

 /// <summary>
        /// 字节转结构体，测试好用
        /// </summary>
        /// <param name="bytes"></param>
        /// <param name="type"></param>
        /// <returns></returns>
        private object BytesToDataStruct(byte[] bytes, Type type)
        {
            try
            {
                int size = Marshal.SizeOf(type);

                if (size > bytes.Length)
                {
                    return null;
                }

                IntPtr structPtr = Marshal.AllocHGlobal(size);
                Marshal.Copy(bytes, 0, structPtr, size);
                object obj = Marshal.PtrToStructure(structPtr, type);
                Marshal.FreeHGlobal(structPtr);
                return obj;
            }
            catch (Exception ex)
            {
                Logger.Debug("MainWinViewModel()->BytesToDataStruct()->" + ex);

                object obj = null;

                return obj;
            }
        }

（2）结构体定义

    public struct SwmData1
    {
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
        public char[] Device_ID;        //size of 2

        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
        public char[] Message_ID;       //size of 3
       
        public short Message_LH;
        public byte Training_ID;

    }

（3）函数调用过程

SwmData1 frame = (SwmData1)BytesToDataStruct(receiveBytes, typeof(SwmData1));