indy 10.5.7的数据发送接收的用法

TMyData = record
      id:Integer;
      Name:Array[0..20] of Char;
      Sex:Array[0..10] of Char;
      Age:Byte;
      Address:Array[0..256] of Char;
      UpdateTime:double;
  end;
//发送结构体：
procedure TForm2.Button2Click(Sender: TObject);
var
  SendData:TMyData;
begin

SendData.ID:=10;
StrPCopy(SendData.Name,'Wyatt');
StrPCopy(SendData.Sex,'男');
SendData.age:=25;
StrPCopy(SendData.Address,'江苏省');
SendData.UpdateTime:=Now;
IdTCPClient1.IOHandler.Write(#99);//接收时便于区分接收的数据类型 自定义
IdTCPClient1.IOHandler.Write(RawToBytes(SendData,SizeOf(SendData)));

end;
//发送TStrings类型
procedure TForm2.Button3Click(Sender: TObject);
var
   sList:TStrings;
   I:Integer;
begin
  sList := TStringList.Create;
  for I :=0  to 30 do
  begin
    sList.Add('数据index' + IntToStr(i));
  end;
  IdTCPClient1.IOHandler.Write(#111);//接收时便于区分接收的数据类型 自定义
  IdTCPClient1.IOHandler.Write(sList.Count);
  IdTCPClient1.IOHandler.Write(ToBytes(sList.Text,TIdTextEncoding.UTF8));
end;
//发送一行字符串数据
procedure TForm2.Button4Click(Sender: TObject);
begin
IdTCPClient1.IOHandler.Write(#12);//接收时便于区分接收的数据类型 自定义
IdTCPClient1.IOHandler.Write('文星',TIdTextEncoding.UTF8);//中文要指定编码，接收时也要进行相应的转换，否则中文会显示成?号
end;

接收：
procedure TForm1.IdTCPServer1Execute(AContext: TIdContext);
var
   ReadData:TMyData;
   buf:TIdBytes;
    sCmd:Char;
   sList:TStrings;
   I:Integer;
   ListCount:Integer;
begin
   sCmd := AContext.Connection.IOHandler.ReadChar;
   if sCmd = #99 then  //接收结构体
   begin
     AContext.Connection.IOHandler.ReadBytes(buf,SizeOf(ReadData));
     BytesToRaw(buf, ReadData, SizeOf(ReadData));

     with Memo1.lines do

       begin

         Add('ID:'+Inttostr(ReadData.Id));

         Add('Name:'+StrPas(ReadData.Name));

         Add('Sex:'+ReadData.sex);

         Add('Age:'+Inttostr(ReadData.age));

         Add('UpdateTime:'+DateTimeToStr(ReadData.UpdateTime));

       end;
   end
   else if sCmd = #111 then  //接收 TStrings
    begin
      ListCount := AContext.Connection.IOHandler.ReadLongInt;
      sList := TStringList.Create;
      try
         AContext.Connection.IOHandler.ReadStrings(sList,ListCount,TIdTextEncoding.UTF8);
          for I :=0  to sList.Count-1 do
          begin
          Memo1.Lines.Add(sList.Strings[I]);
          end;
      finally
          sList.Free;
      end;
    end
    else if sCmd = #12 then
   begin
    Memo1.Lines.Add(AContext.Connection.IOHandler.ReadString(AContext.Connection.IOHandler.InputBuffer.Size,TIdTextEncoding.UTF8)
   end
  else
     AContext.Connection.IOHandler.InputBuffer.Clear;//清除不能识别的命令
);
 
end;