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Home Architecture, security and coding How to parse the HL7 DateTime with nHapi
How to parse the HL7 DateTime with nHapi
Written by Division by Zero   
Tuesday, 30 August 2011 08:41

Recently someone asked me how to parse the DateTime form a HL7 message to a .Net DateTime. In may I wrote a post on how to read SIU messages. The last part was some code on how to parse this DateTime. Since it was quite a big post, this bit was quite hidden. So here's how to parse the HL7 DateTime.

I have copied the code from the earlier post (yes.. that's how lazy I am!).

TQ tq = message.SCH.GetAppointmentTimingQuantity().First();
TS startTime = tq.StartDateTime;
DateTime result = new DateTime(startTime.TimeOfAnEvent.Year, startTime.TimeOfAnEvent.Month, startTime.TimeOfAnEvent.Day, startTime.TimeOfAnEvent.Hour, startTime.TimeOfAnEvent.Minute, startTime.TimeOfAnEvent.Second);

In this code I interpret the TS data type within the TQ data type. There are a few data types concerning time.

Data Type Name Description

DR

Date/time range

Scheduling Only:

<range start date/time (TS)> ^ <range end date/time (TS)>

RI

Repeat interval

Scheduling Only:

<repeat pattern (IS)> ^ <explicit time interval (ST)>

SCV

Scheduling class value pair

Scheduling Only:

<parameter class (IS)> ^ <parameter value (IS)>

TQ

Timing/quantity

<quantity (CQ)> ^ <interval (*)> ^ <duration (*)> ^ <start date/time (TS)> ^ <end date/time (TS)> ^ <priority (ID)> ^ <condition (ST)> ^ <text (TX)> ^ <conjunction (ID)> ^ <order sequencing (*)>
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