filewrite(), fileread(), confused

New comment
 

Hi,

I am trying to write some filewrite() and fileread() codes. filewrite() like this:

  int Open_Filing()
  { Handle_Open=FileOpen("open.csv", FILE_CSV|FILE_READ, ';');
    if (Handle_Open<0)
      { Handle_Open=FileOpen("open.csv", FILE_CSV|FILE_WRITE, ';');
        Handle_Open=FileOpen("open.csv", FILE_CSV|FILE_READ, ';');
      }
 
    if(Handle_Open>0)
      { Handle_Open=FileOpen("open.csv", FILE_CSV|FILE_WRITE, ';');
        FileWrite(Handle_Open,OrderType(),OrderOpenTime(),OrderSymbol(),OrderOpenPrice(),OrderStopLoss(),OrderTakeProfit());
        FileClose(Handle_Open);
      }
    return(0);
  }

It works. But fileread() like this:

    Read_Open=FileOpen("open.csv", FILE_CSV|FILE_READ, ';');
    if(Read_Open>0)
      { FileSeek(Read_Open, 0, SEEK_SET);
        Open_Order_Type=StrToInteger(FileReadString(Read_Open));
        Open_Open_Time=StrToTime(FileReadString(Read_Open));
        Open_Order_Symbol=FileReadString(Read_Open);
        Open_Open_Price=StrToDouble(FileReadString(Read_Open));
        Stop_Loss=StrToDouble(FileReadString(Read_Open));
        Take_Profit=StrToDouble(FileReadString(Read_Open));
      }
    else
      { Read_Open=FileOpen("open.csv", FILE_CSV|FILE_WRITE, ';');
        Read_Open=FileOpen("open.csv", FILE_CSV|FILE_READ, ';');
      }
    FileClose(Read_Open);

does not work. I know there must be some mistakes but I do not know where they are.

Please help, Thanks!

 

Hi danceWithLions,


for me your code prefectly works, what is not working for you? Do you get compilation errors or is the output incorrect? I mean, of course your snippet is not complete - I just added the missing dataTypeDeclarations to my copy but then it worked...


 

Hi tradeigel


Thanks a lot! I will double check. The output is incorrect.

Happy trading!


 
DanceWithLions wrote >>

I meet the same problem now，the fileread get NULL value，why？？

 
Read_Open=FileOpen("open.csv", FILE_CSV|FILE_WRITE, ';');
When that executes, it creates a new empty file. Is that what you want?
 
phy wrote >>
Read_Open=FileOpen("open.csv", FILE_CSV|FILE_WRITE, ';');
When that executes, it creates a new empty file. Is that what you want?

I want open a csv file that haved data，i open it with

handle=FileOpen("Report.csv", FILE_CSV|FILE_WRITE|FILE_READ, ',');

i found that this code will open a empty file， so i read NULL value with

Print("read=",FileReadString(handle));

how can i open a file with data？

 

If FILE_WRITE does not combine with FILE_READ, a zero-length file will be opened. If even the file containd some data, they will be deleted. If there is a need to add data to an existing file, it must be opened using combination of FILE_READ | FILE_WRITE.
If FILE_READ does not combine with FILE_WRITE, the file will be opened only if it already exists. If the file does not exist, it can be created using the FILE_WRITE mode.

I found it does't work like the note in help document

 

" how can i open a file with data？"

to open read-only

handle = FileOpen(fileName, FILE_CSV|FILE_READ, ';')

to open with read/write permission

handle = FileOpen(fileName, FILE_CSV|FILE_READ|FILE_WRITE, ';')

 

the trouble haved been shooted

i have a mistake in my EA

New comment