Question

我有以下Delphi代码：

type
   RegbusReq2=packed record 
     Funct:char;             
     Device:char;           
     Device1:char;
     Starting:integer;       
     Quantity:smallint;      
     _CRC:Word;              //CRC
     stroka:char;          
   end;

   type                         
     crcReg=packed record
     buf:array[0..2] of byte;
     value:array[0..5] of byte;
   end;

   type                          
   myRB=record                      
   case byte of
    0:(data:RegbusReq2);
    1:(Buff:crcReg);
   end;
...
procedure TForm1.Button3Click(Sender: TObject);
var
  DataReq:myRB;
  Output:array[1..15] of Byte;
  i:integer;
  nomP:string;
  st:string;
begin
cs1.Address:=edit5.Text;  
 cs1.Port := 6001;
typecon:=2;

DataReq.data.Funct:=chr(63);    
DataReq.data.Device:=chr(48);     
DataReq.data.Device1:=chr(49);    
DataReq.data.Starting:=768;     
DataReq.data.Quantity:=7;      
DataReq.data._CRC:=CRC2(@DataReq.Buff.value,6);      
  memo1.Lines.Add(IntToStr(DataReq.data._CRC));
DataReq.data.stroka:=chr(13);             
application.ProcessMessages();
  cs1.Active:=true;
  cs1.Socket.SendBuf(DataReq.data,SizeOf(DataReq.data));
  application.ProcessMessages();
  cs1.Socket.ReceiveBuf(output,SizeOf(output));         
  application.ProcessMessages();
  cs1.Active:=false;
  application.ProcessMessages();

if output[1]<>62 then begin
  showmessage('îøèáêà ñâÿçè');
  exit;
end;
  for i:=10 to 15 do
  begin
    nomp:= nomp + chr(Output[i]);
    st:=st + '_' + inttostr(output[i]);
  end;
  memo1.Lines.Add(inttostr(sizeof(DataReq.data)));
  memo1.Lines.Add(st);
  memo1.Lines.Add(DataReq.data.Funct);
  form1.Caption:=nomp;
  Button1.Enabled:=true;
end;

此代码正常工作，在Delphi我看： http://i48.tinypic.com/ei6ph5.png

在C＃中，我开始使用以下struct结构代码：

[StructLayout(LayoutKind.Explicit, CharSet = CharSet.Ansi, Size=12)]
        struct RegBusRec
        {
            [FieldOffset(0)]
            public char Funct;
            [FieldOffset(1)]
            public char Device;
            [FieldOffset(2)]
            public char Device1;
            [FieldOffset(6)]
            public uint Starting;
            [FieldOffset(8)]
            public ushort Quantity;
            [FieldOffset(10)]
            public uint _CRC;
            [FieldOffset(11)]
            public char Message;
        }

我尝试使用代码将srtuct转换为字节数组：

public static byte[] Serialize(object obj)
        {
            Type objectType = obj.GetType();
            int objectSize = Marshal.SizeOf(obj);
            IntPtr buffer = Marshal.AllocHGlobal(objectSize);
            Marshal.StructureToPtr(obj, buffer, false);
            byte[] array = new byte[objectSize];
            Marshal.Copy(buffer, array, 0, objectSize);
            Marshal.FreeHGlobal(buffer);
            return array;
        }

并发送：

System.Net.Sockets.TcpClient cl = new System.Net.Sockets.TcpClient();
            cl.Connect(IPAddress.Parse("xxx.xxx.xxx.xxx"), 6001);
if (cl.Connected)
            {
RegBusRec req2 = new RegBusRec();
                req2.Funct = '?';
                req2.Device = '0';
                req2.Device = '1';
                req2.Starting = 768;
                req2.Quantity = 7;
                req2.Message = '\r';
byte[] data = Serialize(req2);
cl.Client.Send(data);
                cl.Client.Receive(output);
if (output[0] != 62)
                {
                    Console.WriteLine("Connection error!");
                    Console.ReadLine();
                }
}

但我从设备收到错误的消息。需要纠正将Delphi代码转换为C＃。提前谢谢。

Answer 1

你的结构错了。它应该是：

[StructLayout(LayoutKind.Sequential, Pack=1, CharSet=CharSet.Ansi)]
struct RegBusRec
{
    public char Funct;
    public char Device;
    public char Device1;
    public int Starting;
    public short Quantity;
    public ushort _CRC;
    public char Message;
}

Delphi Integer与C＃int匹配。 Delphi Smallint与C＃short匹配。 Delphi Word与C＃ushort匹配。

您使用明确的布局只会让您的生活变得艰难。使用顺序和Pack属性来简化问题。

在初始化您编写的结构的代码中：

req2.Device = '0';
req2.Device = '1';

我希望你打算写

req2.Device = '0';
req2.Device1 = '1';

我没有检查任何其他内容，可能还有其他错误，我没有找到。如果我是你，我会添加诊断代码，逐字节地发出你的序列化结构，这样你就可以确定你正确地序列化了它。

Delphi记录转换为C＃struct并写入socket

1 个答案: