building a windows client

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Building a Windows Client

Brian Postlethwaite

Phoenix, AZ - May 2014


Who am I?

Name: Brian Postlethwaite Company: DCA eHealth Solutions,

Australia Background:

HL7 Patient Administration team OMG Healthcare DTF: ServD Standard Solutions Architect

Contact: [email protected]

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Introductions

Who is building with .NET?

Who is using the fhir API?

Who grabs it from Github/NuGet?

Which Platform(s) are you targeting?

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Contents…

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fhir .NET Model / API Where to get them Building your own API

And contribute!

MVVM quick overview Make a View Model Sharing Code “Tweaking” code


What is the fhir Model/API?

Object Model Validation Cardinality Contained Objects Extensions

API Parsers/Serialization Utilities Validators Simplified Common

Operations

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Why not native?

Own code – Must maintain it Need to consider both formats (json/xml) Handle extensions cleanly Both formats have their own “specifics” XML and json are best represented on the

wire in different ways The fhir client has been extensively tested,

and continues to grow6


Where can nuGet It?

NuGet! Directly from within Visual Studio

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Where else can I Git It?

GitHub! https://github.com/ewoutkramer/fhir-net-api

Location of the API Source Mirror of the HL7 Forge c# model code

Which can be downloaded from the fhir site Easier to see the history and change

Build and Contribute! Contains .NET 4.0/4.5/PCL 4.5 projects

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Documentation

http://ewoutkramer.github.io/fhir-net-api/

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MVVM Review

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Data-Binding

Properties in object INotifyPropertyChanged Events Observable Collections Converters IValueConverter

INotifyPropertyChanged was recently added to the basic Model objects

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Commands

For use with Data-binding functionality Class that derives from ICommand Supports enabling/disabling

Example Commands Search Clear Save

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Test Data

Create some test data (patient-test-data.xaml)

Create “test data in code” Use in the design surface Issues:

The fhir model uses nested classes(Not supported by the test data xaml stuff)

To overcome this, for the properties that you intend to data-bind, create simple properties that encapsulate nested classes

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My App Project Structure

fhir place Solution dca.fhir.Model (PCL) fhir-place-wpf (net 4.0) fhir-place-win8 (Net 4.5) fhir-place-Phone8 (Silverlight 8) fhir-place (univeral app) *new*

fhir-place.Windows (Windows 8.1) fhir-place.WindowsPhone (Windows Phone 8.1) fhir-place.Shared

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Design Your Model / View Model

What is your app trying to display? What user interactions are planned? What form factors are you covering? What is your navigation model? What are the connectivity issues? Error handling/reporting? User Interface control requirements? Security?

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Demo App

Server textbox Search for Name textbox Search Button Total Results counter Search Command Patient List results Patient Item User Control

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DEMONSTRATIONFull Search Patient App

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My Apps

Simple Patient Viewers Wrapped Model Cached Reference Items Recent Viewed List Patient Demographics, Allergies, Conditions,

Medication Statements, Observations (with Charts)

Aggregates results from multiple servers To be published in the Microsoft App Stores

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My Apps

Simple Patient Viewer Concept Doctor Viewing Patient Records in

the field (well golf course!)

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My Apps

Concept Emergency Room App(Bed End or Nurse’s Mobile Device)

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Try it yourself!

Repeat my live demonstration app!

Do it for a different resource type

Point it at your own fhir server!

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Questions?

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Thank you

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building a windows client

Documents