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  • Blog Post: Introduction to HealthVault Development #13: More more than one person

    In the last installment, we modified our application so that it could switch between family members for data display and entry. This time, we’re going to add a table at the top that shows the current weight for all family members. We add the table right after the <h1> title: Family Summary <br...
  • Blog Post: Introduction to HealthVault Development #12: More than one person…

    WeightTracker has gotten popular, and we have a new scenario. Our users would like us to extend our application so that they can easily enter weights for each member of the family. This will require us to delve a bit more deeply into users, records, and authentication, and we’ll also explore the HealthVault...
  • Blog Post: Introduction to HealthvaultDevelopment #11: Data filtering

    The users are unhappy. The weight tracking application worked pretty well initially, but now that they’ve been using it daily for a few months, it’s showing them too much information. They would like it to show the recent results. That will take us into filtering… Filtering is done using the aptly...
  • Blog Post: Introduction to HealthVault Development #10: Adding additional data to healthvault

    We have a new user request. One of our users would like to store how hungry he whenever he enters a weight value. We head off to the HealthVault MSDN page , go to the learn page and then the reference page , and then choose HealthRecordItem Type Schema Browser . This page talks to the developer platform...
  • Blog Post: Introduction to HealthVault Development #9: Optional Authorization

    This week, we have a new customer request. One of our customers wants to track her mood on a daily basis. We can do this by using the Emotion data type, but after talking with our broader customer base, we find that some of them don’t want this information displayed by the application. What to do? What...
  • Blog Post: Introduction to HealthVault Development #8: Related items

    Our current application allows users to track their weight, but some of our users also want to track the time they spend walking. In this episode, we’ll extend our application to store and display that information. We will be storing that information in the Exercise type. First, we’ll need to head off...
  • Blog Post: Introduction to HealthVault Development #7 – Data provenance

    After our application is “in the wild” for a while, we receive some strange reports from our users. Some of the weight data being displayed appears to be suspect, and after investigation we find out that some of our users are also running an application named WeightOptimizer . Download and set...
  • Blog Post: Introduction to HealthVault Development #6 – Fixing a mistake

    After we’ve released our application, some of our users complained that they accidentally entered an incorrect weight, and would like to have a way of fixing it. We will therefore extend our application to be able to update a weight. We’re going to do that by creating a separate edit page (editing...
  • Blog Post: Introduction to HealthVault Development #5 – Do I weigh too much?

    A common question asked by people is “do I weigh too much”, so we’re going to add the calculation of BMI to our application. <aside> The question of what a person’s desirable weight is – or even if there is a desirable weight – is one with lots of opinions. I chose to do BMI here because...
  • Blog Post: Introduction to HealthVault Development #4 – Storing and retrieving weights

    We are now ready to make our WeightTracker application do something useful. That something useful is composed of two stories: The user enters a weight, and it’s stored to the user’s HealthVault record The weight measurements in the user’s record are displayed We’ll do them in order. ...
  • Blog Post: Introduction to HealthVault Development #3: Configuring our application

    Now that we have HelloWorld set up and running, we want to move on to developing the real application. We’ll start with a shell application and add to it as we go. Download the WeightTracker shell , and open the project in Visual Studio. Register the certificate using the same process you used in...
  • Blog Post: Introduction to HealthVault Development #2: Hello World

    In this post, we’ll create an account on the HealthVault system, open up the HelloWorld sample application, and verify that it works on our system. There are two live HealthVault platforms. A developer platform at http://www.healthvault-ppe.com . This platform is intended to store test data...
  • Blog Post: Introduction to HealthVault Development #1: Introduction

    Welcome to the tutorial. In this tutorial, we will develop a HealthVault application from scratch. My intention is to add new tutorial chapters on a roughly weekly basis, though I have a few ones queued up and already to go. If you haven’t located the HealthVault Developer Center on MSDN , start by spending...
  • Blog Post: Introduction to HealthVault Development #0: Background

    Coding without a net Over the years, I’ve attended a number of talks that show you how easy it is to use a new component, using canned projects, pre-written code that is cut-and-pasted in, and contrived scenarios. In the early years of .NET, I saw a different sort of talk (which I believe was done...
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