FileWriteStruct Issue

[Stanislav Ivanov]

Hi guys, i am using a struct to save DoM data into a file(TXT), but it has a problem, it is for passing a struct object , not a link or a reference. I tried doing that but didnt work.

I am sending the code if someone can help.

   Datefile file;
   file.symb=_Symbol;
   file.ask_volume=Ask;
   file.bid_volume=Bid;
   file.tm=time;
   int file_handle=FileOpen(file_name,FILE_WRITE|FILE_READ|FILE_BIN|FILE_COMMON);//|FILE_READ|FILE_TXT|FILE_ANSI,'\t',CP_ACP
   if(file_handle!=INVALID_HANDLE)
     {
      PrintFormat("%s file is available for writing",file_name);
      PrintFormat("File path: %s\\Files\\",TerminalInfoString(TERMINAL_DATA_PATH));
      //--- first, write the number of signals
      FileSeek(file_handle,0,SEEK_END);
      uint write=FileWriteStruct(file_handle,file);
      Print("Write ",write," errro ",GetLastError());
      //--- close the file
      FileClose(file_handle);
      PrintFormat("Data is written, %s file is closed",file_name);
     }
   else
      PrintFormat("Failed to open %s file, Error code = %d",file_name,GetLastError());
  }

[Mehrdad Jeddi]

Hi,

Your code is incomplete.

So if you check the documentation carefully,it explained as "The structure should not contain strings, dynamic arrays or virtual functions" at " FileWriteStruct" function section.

So it means,your structure should not contain string data type in its variable stack,

So your structure should be like below:

struct Datefile
  {
   //string            symb;
   double            ask_volume;
   double            bid_volume;
   datetime          tm;
  };

And the :

//file.symb=_Symbol;

Should be removed,

[Stanislav Ivanov]

Mehrdad Jeddi:

Hi,

Your code is incomplete.

So if you check the documentation carefully,it explained as "The structure should not contain strings, dynamic arrays or virtual functions" at " FileWriteStruct" function section.

So it means,your structure should not contain string data type in its variable stack,

So your structure should be like below:

And the :

Should be removed,

Thanks for your help

[Mehrdad Jeddi]

Stanislav Ivanov:

Thanks for your help

You're welcome,