This article introduces basic JavaScript concepts, and builds on those concepts to explain how AJAX is used and, more importantly, why. This is not an in-depth look at JavaScript, nor is it intended to be. As with all tutorials on this site, you should already be familiar with X/HTML and CSS, and have a general idea of what JavaScript is and how it’s used.

This article explains the three primary methods of outputting data onto a webpage from the code-behind class: Labels, Literals, and the Response.Write() method. This article is also useful for gaining a basic understanding of how .NET handles communication between elements on the ASPX webpage and the C# code-behind class.

This article explains the use of switch constructs. Switch constructs are a conditional, like if/else constructs discussed in the previous ASP.NET Tutorial 4. In all honesty, you won’t use switch blocks nearly as often as you will use if… but there are times when they just plain make more sense.

A switch block compares a single variable or value to any number of other values, and when it finds a match, it executes some code. What really makes switch blocks handy is that after it finds a match, it will keep checking conditions until you tell it to stop (by using the break keyword).

This article will introduce you to conditionals in C#. Conditionals are a program’s decision-makers. They are used to evaluate and compare data, and then take different sets of actions based on the evaluations. It’s really not very different from the way humans make decisions. For instance, let’s say you’ve decided that you want go swimming… but only if it’s not too cold outside (because I live in sunny California, I’d consider anything 75 or under is “too cold”). If you can phrase a concept like that in English ("if it’s over 75 degrees outside, I’ll go swimming"), you can program it just as easily.

Hopefully by the end of this article you will be able to write some of the most basic conditionals in C#… if constructs. We’ll even cover some of the more fancy variations of if… including if else and if else if constructs.