关于struct 转换成数组的问题

Question

        public struct authseed
        {
            public UInt32 Index;
            public UInt32 reslet;
            public UInt16 nLen;
            public Int64 p;
            public Int64 q;
            public Int64 r;
        }
        byte[] RecvBuf = new byte[0x1000];
        
        authseed seed = RecvBuf ??? 怎么转换  

Answer 1

Method 1:        [StructLayout(LayoutKind.Sequential, Pack=2)]
        public struct authseed
        {
            public UInt32 Index;
            public UInt32 reslet;
            public UInt16 nLen;
            public Int64 p;
            public Int64 q;
            public Int64 r;
        }        void Test()
        {
            byte[] RecvBuf = new byte[] {
                1,0,0,0, 
                2,0,0,0,  
                3,0, 
                7,0,0,0,0,0,0,0,
                8,0,0,0,0,0,0,0,
                9,0,0,0,0,0,0,0,
            };            GCHandle gch = GCHandle.Alloc(RecvBuf, GCHandleType.Pinned);
            authseed seed = (authseed) Marshal.PtrToStructure(gch.AddrOfPinnedObject(), typeof( authseed ) ); //<---
            gch.Free();
        }
Method 2 (easier to understand):        public struct authseed
        {
            public UInt32 Index;
            public UInt32 reslet;
            public UInt16 nLen;
            public Int64 p;
            public Int64 q;
            public Int64 r;            public void GetValueFrom(byte[] buffer)
            {
                this.Index = (uint)BitConverter.ToInt32(buffer, 0);
                this.reslet = (uint)BitConverter.ToInt32(buffer, 4);
                this.nLen = (ushort)BitConverter.ToInt16(buffer, 8);                int offset = 10;               // offset = 12 if pack is 4 (aligned in 4 byte)!                this.p = BitConverter.ToInt32(buffer, offset + 0);
                this.q = BitConverter.ToInt32(buffer, offset + 8);
                this.r = BitConverter.ToInt32(buffer, offset + 16);
            }
        }
        void Test()
        {
            authseed seed = new authseed();
            seed.GetValueFrom(RecvBuf);              //<---
        }