EDI file with multiple ISA envelopes

Comments

6 comments

  • Avatar
    Admin

    Hello,

    Parsing EDI file with a single ISA envelope or with multiple ISA envelopes is exactly the same, you don't have to do anything specific.

    The reader reads one item at a time and as long as you check when the next envelope begins, you can process all the following segments as part of that envelope:

    using (var ediReader = new X12Reader(ediStream, TemplateFactory.FullTemplateFactory))
    {
    while (ediReader.Read())
    {
    var isa = ediReader.Item as ISA;
    if(isa != null)
    {
    // a new envelope begins
    }

    Also, the ediReader maintains the current GS and ISA, hence for every message, regardless in which envelope, you can refer to its headers:

    using (var ediReader = new X12Reader(ediStream, TemplateFactory.FullTemplateFactory))
    {
    while (ediReader.Read())
    {
    var isa = ediReader.CurrentInterchangeHeader; // the current ISA if X12
    var gs = ediReader.CurrentGroupHeader // the current GS if X12

     

  • Avatar
    Patrick Gonzalez

    I want to split a single EDI file with multiple ISA envelopes into multiple EDI files, each with a single ISA envelope.  Is there an easy way to do this?  Is there a property of ediReader that provides the entire segment text, so I can write the segment to a variable or text file?

  • Avatar
    Admin

    You can split a multi-envelope file to single envelope files like this:

    Stream ediStream = File.OpenRead(Directory.GetCurrentDirectory() + @"my file with multiple envelopes");
    using (var ediReader = new X12Reader(ediStream, TemplateFactory))
    {
    int i = 0;
    var filePath = $"my_separate_envelope_file_{i++}.txt";

    while (ediReader.Read())
    {
    if (ediReader.Item is ISA isa)
    filePath = $"my_isa_{isa.InterchangeControlNumber_13}_{i++}.txt";

    if (ediReader.Item is EdiMessage msg)
    File.AppendAllText(filePath, msg.ToEdi(new X12WriterSettings(ediReader.Separators)));

    if (ediReader.Item is ControlSegment controlSegment)
    File.AppendAllText(filePath, controlSegment.ToEdi(ediReader.Separators));
    }
    }

     

     

  • Avatar
    Patrick Gonzalez

    This'll work for me.  Thank you!

  • Avatar
    Admin

    No problem, just updated the snippet to account for the current separators as well, as some may be different than the default.

  • Avatar
    Patrick Gonzalez

    Thanks.  By the way, the original syntax of your snippet didn't compile for me, so I changed it based on other code examples I've seen.  I changed it to something more like this:

    ISA isa = ediReader.Item as ISA;

    if (isa != null)

    {

    //Do Stuff

    }

    EdiMessage msg = ediReader.Item as EdiMessage;

    if (msg != null)

    {

    File.AppendAllText(fileName, msg.ToEdi(new X12WriterSettings(ediReader.Separators)));

    }

    ControlSegment ctlSeg = ediReader.Item as ControlSegment;

    if (ctlSeg != null)

    {

    File.AppendAllText(fileName, ctlSeg.ToEdi(ediReader.Separators));

    }

     

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