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 how to send an email that includes an attachment from a web form. This is particularly useful if you need to create a web form that allows users to upload their own file attachments. The examples in this article assume that you already have a form with a FileUpload element in it, named “fuAttachment”. This particular method is especially useful since it does not require you to save any files to the server before sending the email. The posted data is instead handled directly.

You should already by familiar with sending emails from ASP.NET before reading this article.

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).