2. .Net is a collection of libraries, templates and services designed to make programming applications of all kinds, easier, more flexible (multi platform), and more scalable  ASP.Net is a subset of.Net that contains tools for developing web based applications

3.  A server is a program that makes services available to another program (a client)  For instance, A web server such as IIS (Internet Information Server) or Apache makes web pages available to a client application such as a browser  A database server makes data available to client that makes a valid request

4.  ASP.Net pages are served from IIS when a browser requests an.apsx page.  IIS passes the request to.Net which processes the C# or VB code and ASP controls, makes any database requests and renders them into xhtml  IIS then sends the rendered page to the browser that made the request

6.  The Page  Web Form  Html and ASP.Net Controls  Code behind  CSS

7.  The page is the container for everything else  An ASP application can contain several pages  Usually the starting page is called “Default.aspx”  Every page begins with a directive  This directive tells IIS that the page is an ASP.Net application

8.  An ASP. Page can have only 1 form.  A key attribute of the form is runat=“server” which tells IIS to send it to.Net for compiling and rendering. (Plain html elements are just passed through to the client without any.net processing)  All asp controls must be contained within the form

9.  An ASP.Net page can use  plain xhtml  Xhtml controls (xhtml with the runat=“server” attribute added)  ASP.Net controls, controls provided by.Net Library  Client side JavaScript

10.  ASP.net pages have two views Design and Source  Design view shows controls approximately as they will appear on the rendered page (some info shown here won’t be displayed)  Source view shows the html and the asp.net controls.  ASP controls are represented as XML fragments  Controls can be added in Design or source views

12.  ASP.Net allows you to write the code in a separate file.  This makes code easier to read and maintain  The page directive tells.Net where to find the code page.  Code can still be placed directly in the web page if you wish either between tags or between brackets

13.  ASP.Net supports CSS and has a good CSS editor  CSS classes and styles can be added to a ASP control by using the CssClass attribute

14.  ASP.Net, like all web pages are stateless.  Every time you click and button or use control that causes postback the page is re-rendered from the server  Information is not retained between postbacks without some additional programming. (Windows forms have state. They keep their variable values and contents in RAM)  This has several implications for web application development that we will have to examine later