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2013.03.29 11:55
Scripts

Demo_FileIsEnding - script for MetaTrader 5

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2603
Rating:
votes: 25
\MQL5\Files\Data\
file.txt (0.1 KB)

The script reads and prints data from a file which is located in the terminal local folder. Reading performs in the loop by the FileReadString() function until the end of the file. The FileIsEnding() function is used to check, if the end of the file is reached.

It should be noted that to define the end of the file, the function tries to read the next string from the file. If it doesn't exist, the function will return true, otherwise it will return false.

Code:

//--- show the window of input parameters when launching the script
#property script_show_inputs
//--- input parameters
input string InpFileName="file.txt";    // file name
input string InpDirectoryName="Data";   // directory name
input int    InpEncodingType=FILE_ANSI; // ANSI=32 or UNICODE=64
//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
void OnStart()
  {
//--- print the path to the file we are going to use
   PrintFormat("Working %s\\Files\\ folder",TerminalInfoString(TERMINAL_DATA_PATH));
//--- reset the error value
   ResetLastError();
//--- open the file for reading (if the file does not exist, the error will occur)
   int file_handle=FileOpen(InpDirectoryName+"//"+InpFileName,FILE_READ|FILE_TXT|InpEncodingType);
   if(file_handle!=INVALID_HANDLE)
     {
      //--- print the file contents
      while(!FileIsEnding(file_handle))
         Print(FileReadString(file_handle));
      //--- close the file
      FileClose(file_handle);
     }
   else
      PrintFormat("Error, code = %d",GetLastError());
  }

Translated from Russian by MetaQuotes Software Corp.
Original code: https://www.mql5.com/ru/code/1617

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