INotifyRead Interface

Get Before/After Read events with the INotifyRead interface

Reads report.inp and skips all the records that are not detail records using a simple criteria

report.inp

-----------------------------------------------------
              XXX Enterprise
-----------------------------------------------------
10249   TOMSP  05071996      11.61
10250   HANAR  08071996      65.83
10251   VICTE  08071996       0.00
                                             Page 1
-----------------------------------------------------
                YYY Enterprise
-----------------------------------------------------
10269   TOMSP  05071996      11.61
10230   HANAR  08071996       0.00
10151   VICTE  08071996      41.34

Report layout.cs

[FixedLengthRecord(FixedMode.AllowVariableLength)]
[IgnoreEmptyLines]
public class OrdersFixed
    :INotifyRead
{
    [FieldFixedLength(7)]
    public int OrderID;

    [FieldFixedLength(8)]
    public string CustomerID;

    [FieldFixedLength(8)]
    public DateTime OrderDate;

    [FieldFixedLength(11)]
    public decimal Freight;


    public void BeforeRead(BeforeReadEventArgs e)
    {
        if (e.RecordLine.StartsWith(" ") ||
           e.RecordLine.StartsWith("-"))
            e.SkipThisRecord = true;
    }

    public void AfterRead(AfterReadEventArgs e)
    {   
        //  we want to drop all records with no freight
        if (Freight == 0)
            e.SkipThisRecord = true;

    }

}

RunEngine.cs

var engine = new FileHelperEngine<OrdersFixed>();
var result = engine.ReadFile("report.inp");

foreach (var value in result)
    Console.WriteLine("Customer: {0} Freight: {1}", value.CustomerID, value.Freight);

Console

Customer:  TOMSP   Freight: 11,61
Customer:  HANAR   Freight: 65,83
Customer:  TOMSP   Freight: 11,61
Customer:  VICTE   Freight: 41,34