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ASP.NET Essential Training
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Understanding how ASP.NET works


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ASP.NET Essential Training

with David Gassner

Video: Understanding how ASP.NET works

ASP.NET is one of the family of software packages known as application servers. An application server is a piece of software that's installed on a web server to create a dynamic application platform. The world wide web includes many clients and servers that are connected over the Internet. Technically speaking, they communicate using a protocol called TCP/IP. This is the protocol that connects all of the computers in the whole world together. When these computers talk to each other, they exchange messages in a format known as HTTP, which stands for HyperText Transfer Protocol. This sort of communication is used whether you are working with a static website, that is a website that delivers static fixed web pages, or a dynamic web application such as those that are supported by ASP.NET.
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  1. 18m 44s
    1. Welcome
      1m 42s
    2. Prerequisites
      2m 21s
    3. Using the exercise files
      1m 32s
    4. Upgrading exercise file websites for ASP.NET 4.5 (NEW)
      2m 40s
    5. What's new in ASP.NET 4 (NEW)
      3m 48s
    6. What's new in ASP.NET 4.5 (NEW)
      3m 23s
    7. What's new in this course update (NEW)
      3m 18s
  2. 33m 34s
    1. Understanding how ASP.NET works
      5m 52s
    2. Installing Microsoft Visual Web Developer 2008
      3m 43s
    3. Installing Visual Studio Express 2012 for web (NEW)
      2m 12s
    4. Hello World: Creating your first ASP.NET web site
      4m 28s
    5. Creating pages with dynamic output
      7m 39s
    6. Understanding the development web server
      4m 49s
    7. Exploring the development environment
      4m 51s
  3. 40m 2s
    1. Understanding Microsoft SQL Server
      5m 47s
    2. Installing SQL Server Express
      6m 51s
    3. Exploring SQL Server Management Studio Basic
      4m 23s
    4. Creating a new database
      8m 51s
    5. Connecting to the database in ASP.NET
      5m 35s
    6. Testing SQL queries
      3m 53s
    7. Presenting a dataset in an ASP.NET page
      4m 42s
  4. 25m 31s
    1. Understanding ASP.NET web form pages
      5m 51s
    2. Separating presentation and logic with code files
      4m 17s
    3. Adding web form controls to a page
      5m 25s
    4. Handling postback data in a web form page
      5m 50s
    5. Using data binding expressions
      4m 8s
  5. 48m 37s
    1. Creating a testing environment
      4m 40s
    2. Declaring and using a simple variable
      6m 14s
    3. Declaring and using a complex object
      6m 16s
    4. Using loops
      6m 52s
    5. Using functions
      9m 25s
    6. Using trace statements
      4m 47s
    7. Debugging with breakpoints
      5m 45s
    8. Commenting code
      4m 38s
  6. 17m 43s
    1. Creating web controls
      5m 53s
    2. Registering a user control on a web form page
      3m 25s
    3. Registering controls globally in the web.config file
      3m 53s
    4. Adding public properties to a web control
      4m 32s
  7. 19m 7s
    1. Understanding Cascading Style Sheets (CSS)
      5m 36s
    2. Attaching external CSS files
      3m 12s
    3. Defining a CSS selector
      6m 10s
    4. Using CSS class selectors in server controls
      4m 9s
  8. 30m 34s
    1. Presenting data with the GridView control
      5m 49s
    2. Controlling GridView paging and appearance
      5m 46s
    3. Editing data with the GridView control
      6m 57s
    4. Presenting data with the DataList control
      5m 42s
    5. Formatting data with binding expressions
      6m 20s
  9. 36m 46s
    1. Using the DetailsView control
      7m 33s
    2. Inserting data with the DetailsView control
      6m 36s
    3. Redirecting page requests
      9m 39s
    4. Creating an update page
      6m 20s
    5. Linking to update pages from the list page
      4m 3s
    6. Deleting database records
      2m 35s
  10. 22m 15s
    1. Customizing forms with item editing templates
      6m 7s
    2. Adding validator controls to a form
      6m 40s
    3. Controlling the validation error message display
      6m 24s
    4. Using the ValidationSummary control
      3m 4s
  11. 29m 49s
    1. Creating a query with joined tables
      8m 6s
    2. Replacing control style properties with CSS
      5m 50s
    3. Creating a CSS file for printing
      3m 14s
    4. Suppressing elements in printed web pages
      5m 47s
    5. Selecting data for a report
      6m 52s
  12. 11m 14s
    1. Understanding ViewState and managing postbacks
      4m 36s
    2. Using session variables
      6m 38s
  13. 20m 57s
    1. Turning on forms authentication
      1m 51s
    2. Creating a page to log in users
      4m 18s
    3. Creating a page to set up new users
      4m 6s
    4. Understanding the security database
      3m 27s
    5. Configuring security in the web.config file
      2m 59s
    6. Creating a page to log out users
      4m 16s
  14. 27m 56s
    1. Installing IIS on Windows XP
      6m 32s
    2. Installing ASP.NET 3.5 on Windows XP
      1m 39s
    3. Deploying a site on Windows XP
      5m 9s
    4. Installing Information Internet Services (IIS) on Windows Vista, Windows 7, and Windows 8
      1m 56s
    5. Configuring ASP.NET 3.5 on Windows Vista
      2m 15s
    6. Deploying an application on Windows Vista
      3m 29s
    7. Scripting a database for deployment
      3m 36s
    8. Exporting database scripts in SQL Server Management Studio 2012 (NEW)
      3m 20s
  15. 2m 0s
    1. Where to go from here
      2m 0s

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ASP.NET Essential Training
6h 24m Beginner Apr 28, 2009 Updated Feb 13, 2013

Viewers: in countries Watching now:

Thousands of businesses have used Microsoft ASP.NET to build professional, dynamic websites. In this course, web developer David Gassner demonstrates the tools needed to build and deploy a dynamic site using ASP.NET 3.5 or 4.5. Covering everything from installing and configuring Visual Web Developer 2008 or Visual Studio Express 2012 for Web and SQL Server Express to creating web form pages, this course is designed to give beginning and intermediate developers hands-on experience.

Topics include:
  • Storing data with SQL Server
  • Using the GridView control to present and edit dynamic data
  • Creating a data entry system
  • Attaching external CSS files
  • Creating pages to log in and authenticate visitors
  • Installing Internet Information Services (IIS) on Windows XP and Windows Vista
  • Deploying an ASP.NET website on IIS
Subjects:
Developer Web Servers Programming Languages Web Development
Software:
ASP.NET
Author:
David Gassner

Understanding how ASP.NET works

ASP.NET is one of the family of software packages known as application servers. An application server is a piece of software that's installed on a web server to create a dynamic application platform. The world wide web includes many clients and servers that are connected over the Internet. Technically speaking, they communicate using a protocol called TCP/IP. This is the protocol that connects all of the computers in the whole world together. When these computers talk to each other, they exchange messages in a format known as HTTP, which stands for HyperText Transfer Protocol. This sort of communication is used whether you are working with a static website, that is a website that delivers static fixed web pages, or a dynamic web application such as those that are supported by ASP.NET.

A client starts the process by sending a request in the HTPP format. The client requests a web resource, which might be a web page, an image file, or text files that contain JavaScript or Cascading Style Sheet code, known as CSS. The server responds by sending back the resource that has been requested. Regardless of whether you are working in a static or a dynamic environment, the client uses a bit of software called the web browser. Personal computers such as those running on Windows or Mac use web browsers such as Internet Explorer, Firefox or Safari. There are many other kinds of web clients though including cell phones and PDAs such as BlackBerrys. The web server is a computer that runs a piece of software called the HTTP server. There are two major HTTP server products on the market. Microsoft's Internet Information Services, also knows as IIS, which is only available for the Windows platform, and Apache, which is a free HTTP server product developed by and provided by the Apache Foundation. If you are going to work with ASP.NET, you will be deploying your web application or your dynamic website using Internet Information Services because only IIS does a good job of integrating the ASP.NET application server.

Here is how a static web page works. The web client makes a request for the resource, let's say a web page, by sending an HTTP formatted request over the Internet to the server. The server responds by locating the file on its hard disk that has been requested. This is known as a static web page with a file extension of typically of .htm or .html. The web server responds by sending that content back to the client and the client, which might be a web browser on a personal computer, renders and displays the web page visually.

When you move to the dynamic environment, the application server software is installed on the same computer as the web server. Let's say Internet Information Services and ASP.NET. The application server, in this case ASP.NET, can communicate with the database and with other server resources. Once again, the web client makes the HTTP formatted request. The web server talks to the application server. The application server talks to the database and other network resources and then it's up to the web server to construct an HTML formatted response, which once again is sent back to the web client.

The important thing here is that the web browser doesn't know that there is an application server at work and therefore doesn't need any additional software. It requests an HTML page and it receives an HTML page and it doesn't know the difference between one that's static and fixed on the server's hard disk and one that's being generated dynamically in response to which request. There are many software packages that you can select from as application servers. If you are watching this video series, you have probably already selected ASP.NET or you are evaluating it for possible use in your organization. Microsoft Active Server Pages or ASP is another option that you might select. Active Server Pages is an older version of Microsoft's Application Server Technology.

You can also select Adobe ColdFusion, a cross operating system product that works on many operating systems including Windows, Mac and Linux and that uses its own proprietary language, ColdFusion Markup Language. Some developers use PHP, a completely free and open source product that once again is available on many operating systems. And for Java developers, there are many application server products available including Websphere from IBM, Weblogic from Oracle, formerly from BEA, JBoss, a completely free J2EE or Java-based server and others, and finally there is Microsoft's ASP.NET.

As you will learn in this video series, ASP.NET is an object-oriented platform that allows you to select from multiple programming languages to create a dynamic web-based application where the client makes a standard HTTP request and the server responds by constructing HTML dynamically and sending that content back to the client. These pages can include JavaScript code, Cascading Style Sheets, image files and everything else that you might include in a static web page.

So that's a look at the basic architecture of ASP.NET. In another videos in this chapter, I describe how to install ASP.NET along with the product called Visual Web Developer, an integrated development environment that can get you started quickly building ASP.NET-based, dynamic web applications.

Find answers to the most frequently asked questions about ASP.NET Essential Training.


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Q: When trying to create a new database, after pasting the text into the SQL Management Suite and executing the query, the database is not created and the following message appears: 

Database 'mybookstore' does not exist. Make sure that the name is entered correctly

What is causing this error?
A: The database must be explicitly created before the script is run. Start by right-clicking on the Databases item in the left panel, then follow the prompts to create the database. Then retry the query.
Q: I am running into problems installing the latest version of ASP.NET. Has the installation procedure changed since this tutorial was recorded?
A: The installation process for the newest version of ASP.NET and its associated tools is a little different than in ASP.NET 3.5, which was used to record this course. You can download Microsoft Web Platform Installer 2.0 from:
<a href="http://www.microsoft.com/web/downloads/platform.aspx" target="blank">http://www.microsoft.com/web/downloads/platform.aspx</a>
Microsoft Web Platform Installer 2.0 includes everything you need:
ASP.NET 4?
Visual Web Developer 2010?
SQL Server Express
You must have one of the following operating systems:
Windows 7?
Windows Vista?
Windows Vista SP1?
Windows XP SP2+?
Windows Server 2003 SP1+?
Windows Server 2008?
Windows Server 2008 R2
You must have administrator privileges on your computer to run the Web Platform Installer.
Q: This course was updated on 2/13/2013. What changed?
A: Since this course was recorded, Microsoft has released both ASP.NET 4.5, the latest version of the server-side web application server, and Visual Studio Express 2012 for Web (the successor product to Visual Web Developer). Both have been adapted to work on Windows 8. There will be some visual changes and some functional changes, but most of the server-side code shown in the course is the same. This update provides a map for those working with the latest software so they can navigate their way through the course.

In particular, we added <em>What's new</em> movies for both ASP.NET 4 and 4.5, a movie explaining the significance of the update, a movie on installing SQL Server Express 2012, and one on exporting database scripts in SQL Server Management Studio 2012, as well as updates to visuals throughout the course.
Q: In the chapter on user authentication, an authentication error results when I try to use the Login component or register a new user. How do I fix this?
A: This is a known error that can occur when using the original release of Visual Studio 2012 Express for Web. Update your copy of Visual Studio for Web to at least maintenance release 1, and then try the exercise again.
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