Decoding a message

var message = @"MSH|^~\&|CohieCentral|COHIE|Clinical Data Provider|TCH|20060228155525||QRY^R02^QRY_R02|1|P|2.3|QRD|20060228155525|R|I||||10^RD&Records&0126|38923^^^^^^^^&TCH|||";

var parser = new PipeParser();
var parsed = parser.Parse(message);
var qryR02 = parsed as QRY_R02;

Assert.IsNotNull(qryR02);
Assert.AreEqual("38923", qryR02.QRD.GetWhoSubjectFilter(0).IDNumber.Value);

Event Map to Code Structure Mappings

Some message types are not mapped to their exact same event type and this can cause some confusion when you first encounter it.

For example ADT^A01, ADT^A04, ADT^A08 and ADT^A13 event types will all be parsed into the ADT^01 structure.

The following unit test illustrates this behaviour:

[Test]
public void TestADTA04IsMappedAsA01()
{
    var hl7Data = @"MSH|^~\&|CohieCentral|COHIE|Clinical Data Provider|TCH|20060228155525||ADT^A04|1|P|2.5.1|
EVN|
PID|1|12345
PV1|1";

    var parser = new PipeParser();
    var msg = parser.Parse(hl7Data);

    Assert.IsNotNull(msg, "Message should not be null");
    var a04 = (ADT_A01)msg;

    Assert.AreEqual("A04", a04.MSH.MessageType.TriggerEvent.Value);
    Assert.AreEqual("1", a04.PID.SetIDPID.Value);
}

The Event to Structure Map for each version of HL7 supported can be found below:

• v2.1
• v2.2
• v2.3
• v2.3.1
• v2.4
• v2.5
• v2.5.1