Adding a button to HTML

Start up a project, and put a button inside the HTML page. To do this, go to View | Toolbox (Ctrl + Alt-X), type but in the search field, and drag and drop the Button control below the line that begins with <form id=.... Change the text on the button to say Save File.

Next, go to the Design view. Double-click on the Save File button. This brings up the event handler inside Default.aspx.cs. Delete the Page_Load stub. Collapse all of the comments above and below using System;—you don't need them. The relevant portion of the starting code for this project should look like that in Figure 28.2.1:

Figure 28.2.1: The starting code for this project

Adding namespaces

First, let's add some...