using System;

    using System.Diagnostics;

    using NHapi.Base.Parser;

    using NHapi.Model.V23.Message;

​

    namespace HapiParserBasicOperations

    {

        public class Program

        {

            public static void Main(string[] args)

            {

                const string messageString = "MSH|^~\\&|SENDING_APPLICATION|SENDING_FACILITY|RECEIVING_APPLICATION|RECEIVING_FACILITY|20110614075841||ACK|1407511|P|2.3||||||\r\n" +

                                            "MSA|AA|1407511|Success||";

System.Diagnostics.Debug.Write(messageString);

                // instantiate a PipeParser, which handles the "traditional or default encoding"

                var ourPipeParser = new PipeParser();

​

                try

                {

                    // parse the string format message into a Java message object

                    var hl7Message = ourPipeParser.Parse(messageString);

​

                    //cast to ACK message to get access to ACK message data

                    var ackResponseMessage = hl7Message as ACK;

                    if (ackResponseMessage != null) {

                        //access message data and display it

                        //note that I am using encode method at the end to convert it back to string for display

                        var mshSegmentMessageData = ackResponseMessage.MSH;

                        Debug.WriteLine("Message Type is " + mshSegmentMessageData.MessageType.MessageType);

                        LogToDebugConsole("Message Control Id is " + mshSegmentMessageData.MessageControlID);

                        LogToDebugConsole("Message Timestamp is " + mshSegmentMessageData.DateTimeOfMessage.TimeOfAnEvent.GetAsDate());

                        LogToDebugConsole("Sending Facility is " + mshSegmentMessageData.SendingFacility.NamespaceID.Value);

​

                        //update message data in MSA segment

                        ackResponseMessage.MSA.AcknowledgementCode.Value = "AR";

                    }

​

                    // Display the updated HL7 message using Pipe delimited format

                    LogToDebugConsole("HL7 Pipe Delimited Message Output:");

                    LogToDebugConsole(ourPipeParser.Encode(hl7Message));

​

                    // instantiate an XML parser that NHAPI provides

                    var ourXmlParser = new DefaultXMLParser();

​

                    // convert from default encoded message into XML format, and send it to standard out for display

                    LogToDebugConsole("HL7 XML Formatted Message Output:");

                    LogToDebugConsole(ourXmlParser.Encode(hl7Message));

​

                }

                catch (Exception e)

                {

                    LogToDebugConsole("Error occured -> {e.StackTrace}");

                }

            }

​

            private static void LogToDebugConsole(string informationToLog)

            {

                Debug.WriteLine(informationToLog);

            }

        }

    }