X12Reader error in InterchangeHeader

Ahmed Imran Khalid

May 15, 2019 09:45
1 comment

I am using below code to get the interchange Control number but getting Null Reference Exception error.

Any idea how to get Interchange Control Number.

I am using Demo version of .NET SDK

using (var ediReader = new X12Reader(x12Stream, LoadFactory, new X12ReaderSettings() { ContinueOnError = true }))
{
x12Items = ediReader.ReadToEnd().ToList();

var icn = ediReader.CurrentInterchangeHeader.InterchangeControlNumber_13;
Console.WriteLine("ICN:{0}", icn);

}

Comments

1 comment

Admin

May 15, 2019 10:58

Hi,

You can access the interchange control number like this:

1. When using ReadToEnd() - this would have read ALL the data in the file so potentially multiple interchange control numbers. You need to tell which interchange control number exactly, that's why CurrentInterchangeHeader is NULL because there is no current:

using (var ediReader = new X12Reader(ediStream, TemplateFactory.TrialTemplateFactory))
    x12Items = ediReader.ReadToEnd().ToList();

var firstIcn = ediItems.OfType<ISA>().First().InterchangeControlNumber_13;
Console.WriteLine("ICN:{0}", firstIcn );

2. When using Read(), you can use the CurrentInterchangeHeader because it's still iterating through the items:

using (var ediReader = new X12Reader(ediStream, LoadFactory))
{
    while(ediReader.Read())
    {
        var icn = ediReader.CurrentInterchangeHeader.InterchangeControlNumber_13;
        Console.WriteLine("ICN:{0}", icn);
    }
}

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