One of the steps for creating a report in Microsoft Access is to define where the data is coming from. This is done through the report’s Record Source property which can be a table or standalone query in the database or a SQL statement as shown in the screenshot below. Usually, this is defined when the…
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Coming in 2019 – CodeScholar Software Development Training!
A simple Google search turns up hundreds of options for learning programming, many free, but where do you start? There are many excellent reference sites and YouTube channels out there but many focus on the mechanics of a single language without explaining the broader concepts and best practices. Many are written by developers for (aspiring) developers and might leave…
Custom User Controls and Events in C#
One of the interesting features of C# is the ability to add custom user controls to your forms. If you have some specific functionality centered around a group of form controls that you use repeatedly, you can save it as a custom control in a class library and then add it to other applications. This…
Using JavaScript with ASP.NET
Why Use JavaScript? There are a few technologies that you must be comfortable with if you want to do any serious web development. HTML for content, CSS for formatting and JavaScript for dynamic programming are recognized as the three foundation skills that any good web designer needs. ASP.NET programmers might be tempted to do away…
My Virtual Vacation and Free Stuff
Summer vacation has mercifully arrived for me and my students. Unlike many teachers, I’m at the school through most of the Summer. My students get three weeks off – I get one week followed by a couple weeks of what will essentially be teacher workdays. Judging from the sympathetic looks I was getting from other…
How to Convert Between Roman and Arabic Numerals in C#
The Challenge My latest challenge to my database programming students was to create a C# class that would perform various number conversions, starting with Arabic numbers (0 to 3999) to Roman numerals and vice versa. I required that all public functions in the class needed to be declared as static, so that they could be…
How to Create Lookup Fields in C#
I started my (more or less) serious database development training many years ago in Microsoft Access. One of my favorite controls was the Combo Box, a nice little drop-down field that enabled the user to select one of many values but collapsed down onto a single line. The Combo Box control in Access was very…
How to Retrieve Data from SQL Server into C#
The .NET framework has a few different automated methods for managing connections to SQL Server and other databases. The framework has been around since 2003 and various versions have introduced new, improved data management tools while maintaining the old ones for backward compatibility. It’s still possible, however to retrieve data from SQL Server and other…
How to Convert Between Decimal and Binary in T-SQL
For the past six months, I’ve been teaching night classes in database programming and my students are just about ready to take Microsoft’s 98-364 exam. Now, we’re transitioning over to C# programming for the next phase of the program but I have to keep their SQL skills fresh for the exam. Tonight, it was time to…
Primes in the Key of C#
Yes, prime numbers are a go-to challenge for me that I’ve been casually playing with since my earliest programming days. I’m not alone; prime numbers are important and popular enough that there’s an entire distributed computing project dedicated to finding the highest Mersenne Prime number (primes such as 31 and 127 that are one less…