Output formatting with FileHelpers

Question

I'm using FileHelpers to create fixed length files. In my model I have a double which needs to be outputted in a 0000.00 format. Is there anyway I can specify this with FileHelpers itself or do I need to change my model to a string and do a .ToString(my_format) when creating the model?

Answer 1

Have you tried using FieldConverters from the FileHelpers library?

Maybe something like this. This is untested, but it might get you on a working path:

using System;
using FileHelpers;

internal class MyDoubleConverter : ConverterBase
{
   public override string FieldToString(object from)
   {
      return ((double) from).ToString("0000.00");
   }
}

[FixedLengthRecord]
public class MyRecordType
{
   [FieldFixedLength(7)]
   [FieldConverter(typeof(MyDoubleConverter))]
   public double MyDouble;
}

Or this may work, and is even simpler:

[FixedLengthRecord]
public class MyRecordType
{
   [FieldFixedLength(7)]
   [FieldConverter(ConverterKind.Double, "0000.00")]
   public double MyDouble;
}

But I think that will enforce the 0000.00 for both reading and writing, and I'm wouldn't know whether that works for your scenario.