New Feature: Playlist Center! Pick a topic and let our playlists guide the way.

Easy-to-follow video tutorials help you learn software, creative, and business skills.Become a member

What's new in ASP.NET 4.5 (NEW)

From: ASP.NET Essential Training

Video: What's new in ASP.NET 4.5 (NEW)

Microsoft's .NET framework was upgraded to version 4.5 in late 2012. Here are some of the new features that you might find useful in your ASP.NET websites. First of all, the .NET framework now supports a new coding model for executing asynchronous HTTP requests, where you send off a request and then the main thread of your code can continue executing while the request is processed on a remote server. When the response comes back, it's up to you to write the code to process that response. In the past, HTTP requests and responses had to be written as separate methods. But now there are two new key words called Await and Async that are implemented in both C# and Visual Basic. Here's how it looks in C#. You mark any method that's going to make an asynchronous call with the Async key word and then you place the Await keyword before any method that you are calling that will be asynchronous. This will result in pausing your code and waiting for the response to come back. This is an alternative to writing callback methods-- separate methods that will be called as an event handler. It results in more coherent, readable code. You can still do the same things as before, making calls to remote servers, but now the code is cleaner and easier to read. This same feature is commonly used in Windows 8 store apps--applications that run in the new start screen on Windows 8 and Windows RT. ASP.NET 4.5 also has features that are unique for web processing. These include request validation features, the ability to defer validation of a request, and the ability to support unvalidated requests, giving your ASP.NET websites much more flexibility in how they interact with the rest of the computing world. There's also now support for web sockets, a particular kind of communication over the internet that's a little bit different than HTTP.

What's new in ASP.NET 4.5 (NEW)

Microsoft's .NET framework was upgraded to version 4.5 in late 2012. Here are some of the new features that you might find useful in your ASP.NET websites. First of all, the .NET framework now supports a new coding model for executing asynchronous HTTP requests, where you send off a request and then the main thread of your code can continue executing while the request is processed on a remote server. When the response comes back, it's up to you to write the code to process that response. In the past, HTTP requests and responses had to be written as separate methods. But now there are two new key words called Await and Async that are implemented in both C# and Visual Basic. Here's how it looks in C#. You mark any method that's going to make an asynchronous call with the Async key word and then you place the Await keyword before any method that you are calling that will be asynchronous. This will result in pausing your code and waiting for the response to come back. This is an alternative to writing callback methods-- separate methods that will be called as an event handler. It results in more coherent, readable code. You can still do the same things as before, making calls to remote servers, but now the code is cleaner and easier to read. This same feature is commonly used in Windows 8 store apps--applications that run in the new start screen on Windows 8 and Windows RT. ASP.NET 4.5 also has features that are unique for web processing. These include request validation features, the ability to defer validation of a request, and the ability to support unvalidated requests, giving your ASP.NET websites much more flexibility in how they interact with the rest of the computing world. There's also now support for web sockets, a particular kind of communication over the internet that's a little bit different than HTTP.

Check the ASP.NET 4.5 documentation for details of all of these new features. There are also features that are targeted at the mobile world, including a new Bundling and Minification tool. These tools can be used to combine multiple JavaScript and CSS files into a single compressed download. This is particularly useful when you're building a website that's optimized for a mobile device, where the size of the files you're downloading can significantly affect performance. The smaller the download, the faster the perceived response on the mobile device. And there are new enhancements for web form pages. These include strongly typed data controls, better data model binding to visual controls such as data lists, HTML-encoded data binding expressions, and a variety of updates to support the generation of HTML5 tags. All of these features and more are described in this web page on the ASP.NET website. Take a look at the documentation on that website for all of the information about what you can do now in ASP.NET 4.5.

Show transcript

This video is part of

Image for ASP.NET Essential Training
ASP.NET Essential Training

79 video lessons · 48119 viewers

David Gassner
Author

 
Expand all | Collapse all
  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

Start learning today

Get unlimited access to all courses for just $25/month.

Become a member
Sometimes @lynda teaches me how to use a program and sometimes Lynda.com changes my life forever. @JosefShutter
@lynda lynda.com is an absolute life saver when it comes to learning todays software. Definitely recommend it! #higherlearning @Michael_Caraway
@lynda The best thing online! Your database of courses is great! To the mark and very helpful. Thanks! @ru22more
Got to create something yesterday I never thought I could do. #thanks @lynda @Ngventurella
I really do love @lynda as a learning platform. Never stop learning and developing, it’s probably our greatest gift as a species! @soundslikedavid
@lynda just subscribed to lynda.com all I can say its brilliant join now trust me @ButchSamurai
@lynda is an awesome resource. The membership is priceless if you take advantage of it. @diabetic_techie
One of the best decision I made this year. Buy a 1yr subscription to @lynda @cybercaptive
guys lynda.com (@lynda) is the best. So far I’ve learned Java, principles of OO programming, and now learning about MS project @lucasmitchell
Signed back up to @lynda dot com. I’ve missed it!! Proper geeking out right now! #timetolearn #geek @JayGodbold

Are you sure you want to delete this note?

No

Thanks for signing up.

We’ll send you a confirmation email shortly.


Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

Keep up with news, tips, and latest courses with emails from lynda.com.

Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

   
submit Lightbox submit clicked
Terms and conditions of use

We've updated our terms and conditions (now called terms of service).Go
Review and accept our updated terms of service.