Support Fixed Length Attribute for defining the starting column in order to omit some uninteresting columns

[Lysander]

It would be great if one could have the ability to ignore certain columns within a data file. I have the use case quite often, that there is much more data in it, than I need (and sometimes it is even difficult to figure out, which sort of data those columns represent!). So it would be great if I could make the definition based upon the start column in combination with the length or even an end column.

I will try to give an example:

017xcJuan Perez           +004350011052002
005  Pedro Gomez          -123423006022004
001abRamiro Politti       -000000001022000
009klPablo Ramirez        +033213024112002
^^^
ID ^^
   not of interest
     ^^^^^^^^^^^^^^^^^^^^^
     Name
                          ^
                          not of interest
                           ^^^^^^^^^^^^^^^
                           phone number

So the resulting definition would look like this:

using FileHelpers;

[FixedLengthRecord()]
public class Customer2
{
    [FieldFixedLength(3)]
    public int CustId;

    // we would not need a field for the two column wide field
    //[FieldFixedLength(2)]
    //public string DontKnow;

    
    [FieldFixedLength(20, 6)] // <- 6 = Start column
    [FieldTrim(TrimMode.Right)]
    public string Name;
    
    // we would not need a field for the "+ / - " column
    //[FieldFixedLength(1)]
    //public string DontKnowEither;    

    [FieldFixedLength(16)] 
    [FieldStartColumn(27)] // or explicitly like this?
    public string Phone;
}

This would be a huge improvement!

[Tabgyn]

Just use the FieldHidden attribute, look https://www.filehelpers.net/mustread/