How To


Naive Bayes Classification Using Python

Dr. James McCaffrey of Microsoft Research uses Python code samples and screenshots to explain naive Bayes classification, a machine learning technique used to predict the class of an item based on two or more categorical predictor variables, such as predicting the gender (0 = male, 1 = female) of a person based on occupation, eye color and nationality.

Blazor on the Server: The Good and the Unfortunate

Blazor on the Server is coming with .NET Core Version 3.0 in the second half of 2019. Here's what Peter thinks of that (and he's not completely happy).

ASP.NET Core Security, Part 1

Eric Vogel kicks off his series on ASP.NET Core security by showing how to set up authentication to register, log in and log out a user account in an ASP.NET Core MVC application.

Logging in .NET Core

.NET Core provides a framework that logging systems can be snapped into. However, what's most important about this framework is how you write your messages out. It's the quality of the message that will let you find where your problems are.

Working with Dynamic Objects: Beyond the Basics with ExpandoObjects

ExpandoObjects let you dynamically add members to your object at run time -- a great way to handle scenarios where you need a lot of flexibility. But how do you work with an object when you don't know the names of its properties?

Weighted k-NN Classification Using Python

Need to predict the political party affiliation (democrat, republican, independent) of a person based on their age, annual income, gender, years of education and so on? Our resident data scientist Dr. James McCaffrey shows a technique that can help with that and much more -- with code!

Making It Up as You Go Along with ExpandoObjects

You can give your users the ability to store any data they want, including stuff they make up at run time, by using an ExpandoObject. In fact, when you don't know what your data is until run time (and you can live without IntelliSense), an ExpandoObject is your best solution.

Managing Page Layouts in Blazor

Blazor, like most systems for generating Web pages, supports using layout pages for repeated content. Here's what works, what doesn't (yet) work and work-arounds I've discovered for what doesn't work.

Managing Production and Development Settings in ASP.NET Core

The reality is that you will need to have, at least, two different configurations: one for production and one for development. Here's how to automate those conversions.

Extending Razor Pages

If you move beyond the basics of working with Razor Pages, there are at least two things you should know to support creating Pages that do more than one thing and integrate with existing code.

Navigating in Blazor

If you're moving your application's client-side code to Blazor, then you'll want Blazor to manage navigating between pages, too.

Quick Tip: How to Try .NET Core 3.0 in Visual Studio 2019

.NET Core 3.0 won't be ready for Visual Studio 2019's April 2 ship date, but a manual download and a menu configuration setting will let you use both previews together right now.

Dealing with Databases (and Data) in Docker

There are lots of ways to handle databases in a containerized environment like Docker. Here's how to create SQL Server in a container, how to load it with the data you want and how to integrate that container into whatever project needs it. Be warned: Some PowerShell is used.

Docker with Real Applications

Here's how to run a "real-world" application (consisting of an MVC application and a Web Service) in a networked set of Docker containers. And it's just a couple of mouse clicks in Visual Studio to implement it.

Neural Anomaly Detection Using Keras

Our resident doctor of data science this month tackles anomaly detection, using code samples and screenshots to explain the process of finding rare items in a dataset, such as discovering fraudulent login events or fake news items.

Support Vector Machines Using Accord.NET

The Data Science doctor delves into supporting vector machines, software systems that can perform binary classification such as creating a model to predict the gender of a person based on their age, annual income, height and weight.

Building Razor Pages

If you want to handle the most common pattern in ASP.NET Controllers (displaying a page and then accepting data entered into it), you can do it with Razor Pages. You'll just need less code than if you used a Controller, a View and a model object.

Getting Started with Razor Pages: A Better Model for Web Development?

As fond as he is of using Controllers and Views, Peter isn't sure that Razor Pages aren't a better model for Web development. But the first step, adding Razor Pages to your project, isn't as easy as it should be. And, after that, you'll want to integrate them with your existing MVC application.

Accessing Configuration Settings in ASP.NET Core

In ASP.NET Core, your web.config file with its <appsettings> section is gone. The replacement is a more extensive and configurable system that you can leverage to simplify configuring your objects.

What's New in and Getting Started with Blazor 0.8.0.0

There are good reasons to keep working with Blazor 0.8.0.0 ... but you're going to need to make some changes.

Configuring Your Application-Wide Objects in ASP.NET Core

ASP.NET Core's support for sharing objects defined at startup is great ... but what if you need to set options on those objects? Here's a case study that starts off great and then descends into over-engineered madness (but only if you want to go that far).

Creating the Right Database Initializer for Entity Framework

If you want to treat your database design as an "implementation detail" that just falls out of getting your object model right, then Entity Framework gives you four choices. Picking the right one, however, may mean creating your own.

Building RESTful Services Using ASP.NET Core

ASP.NET Core makes building RESTful services easy and comfortable, says Joydip Kanjilal, who shows how to do just that in this article, complete with code samples and screenshots.

ASP.NET Core: Learning the Ropes, Part 3

Eric Vogel uses code samples and screenshots to demonstrate how to create and use the views and controller for an ASP.NET MVC Core CRUD application.

Self-Organizing Maps Using Python

Dr. James McCaffrey of Microsoft Research uses a full project code sample and screenshots to detail how to use Python to work with self-organizing maps (SOM), which let you investigate the structure of a set of data.

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