Questions from Beginners MQL5 MT5 MetaTrader 5 - page 929

[Vladimir Karputov]

Juer:

Code

Gives this result:

What am I doing wrong?

You can't go through all enumeration members. Built-in enumerations cannot be traversed as an array - like from "0" to "end". To traverse inline enumerations, you need to address each member of the enumeration directly, correctly. For example like this:

//+------------------------------------------------------------------+
//|                                              ENUM_TIMEFRAMES.mq5 |
//|                        Copyright 2016, MetaQuotes Software Corp. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2016, MetaQuotes Software Corp."
#property link      "https://www.mql5.com"
#property version   "1.00"
//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
void OnStart()
  {
//---
   Print("PERIOD_CURRENT ",PERIOD_M1,"\n",
         "PERIOD_M2 ",PERIOD_M2,"\n",
         "PERIOD_M3 ",PERIOD_M3,"\n",
         "PERIOD_M4 ",PERIOD_M4,"\n",
         "PERIOD_M5 ",PERIOD_M5,"\n",
         "PERIOD_M6 ",PERIOD_M6,"\n",
         "PERIOD_M10 ",PERIOD_M10,"\n",
         "PERIOD_M12 ",PERIOD_M12,"\n",
         "PERIOD_M15 ",PERIOD_M15,"\n",
         "PERIOD_M20 ",PERIOD_M20,"\n",
         "PERIOD_M30 ",PERIOD_M30,"\n",
         "PERIOD_H1 ",PERIOD_H1,"\n",
         "PERIOD_H2 ",PERIOD_H2,"\n",
         "PERIOD_H3 ",PERIOD_H3,"\n",
         "PERIOD_H4 ",PERIOD_H4,"\n",
         "PERIOD_H6 ",PERIOD_H6,"\n",
         "PERIOD_H8 ",PERIOD_H8,"\n",
         "PERIOD_H12 ",PERIOD_H12,"\n",
         "PERIOD_D1 ",PERIOD_D1,"\n",
         "PERIOD_W1 ",PERIOD_W1,"\n",
         "PERIOD_MN1 ",PERIOD_MN1,"\n");
  }
//+------------------------------------------------------------------+

[Juer]

Vladimir Karputov:

You don't go through all the enumeration members. Built-in enumerations cannot be traversed as an array - like from "0" to "end". To access embedded enumerations, you must address each member of the enumeration directly, correctly. For example like this:

Who would have thought...

[Juer]

int val=(int)PERIOD_H1;

In an expression like this, val is 16385. What is this value?

I always thought int and enum could be easily converted to each other :(

[Vladimir Karputov]

Juer:
Who would have thought...

If you want to access a standard enumeration as an array, you must first declare and fill such an array yourself:

//--- variant 2
   ENUM_TIMEFRAMES timeframes_array[21]=
     {
      PERIOD_M1,PERIOD_M2,PERIOD_M3,
      PERIOD_M4,PERIOD_M5,PERIOD_M6,
      PERIOD_M10,PERIOD_M12,PERIOD_M15,
      PERIOD_M20,PERIOD_M30,PERIOD_H1,
      PERIOD_H2,PERIOD_H3,PERIOD_H4,
      PERIOD_H6,PERIOD_H8,PERIOD_H12,
      PERIOD_D1,PERIOD_W1,PERIOD_MN1
     };
   int size=ArraySize(timeframes_array);
   for(int i=0;i<size;i++)
      Print(i,": ",EnumToString(timeframes_array[i])," ",timeframes_array[i]);

[Vladimir Karputov]

Juer:

In an expression like this, val is 16385. What is this value?

I always thought int and enum could be easily converted to each other :(

My example above(#9281): reproduce and look at the numbers

[User_mt5]

I'm trying to set up an ftp file transfer.

Pressing Test button in Service-Settings-FTP allows to send file, i.e. passwords and path are correct.

I can 't send files via software. When sending file via script when executing SendFTP("File_1.txt", "/ftp_failes"); the terminal hangs. File_1.txt is in the Files directory.

Question. TerminalInfoInteger( TERMINAL_FTP_ENABLED) in my script =0. I can't find where and how it is configured at all, please advise.

And can you tell me what else I'm missing?

[User_mt5]

User_mt5:

I'm trying to set up an ftp file transfer.

Pressing Test button in Service-Settings-FTP allows to send file, i.e. passwords and path are correct.

I can 't send files via software. When sending file via script when executing SendFTP("File_1.txt", "/ftp_failes"); the terminal hangs. File_1.txt is located in the Files directory.

Question. TerminalInfoInteger( TERMINAL_FTP_ENABLED) in my script =0. I can't find where and how it is configured at all, please advise.

And can you tell me what else I missed?

The reason was: naming a file in Russian letters is not allowed.
The issue has been resolved.

[Juer]

I'm trying to read a string from a file:

#include <Files\FileTxt.mqh>
CFileTxt          m_file_txt;
m_file_handle=m_file_txt.Open(m_file_name,FILE_CSV|FILE_READ|FILE_COMMON|FILE_ANSI,10);
m_file_txt.Seek(0,SEEK_SET);
string str=m_file_txt.ReadString();

Here is the first line in the file:

,1,1,1,21,0,unmatch count,IGNORECRLF

I only get the character "," in str.

[Juer]

FILE_UNICODE

helped, but in this case the Chinese characters are read.

What if I need ANSI? Why can't I read a whole string when the FILE_ANSI flag?

[ascerdfg]

Can:

   int cur_bars=Bars(_Symbol,PERIOD_CURRENT);

replace with:

   int cur_bars=Bars(_Symbol,_Period);