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

Binding to an RSS feed

From: Visual Studio 2010 Essential Training

Video: Binding to an RSS feed

RSS is a very popular format. In this movie, I want to show you how to bind your application to an RSS feed. I'm inside Internet Explorer, and I have my blog opened. It's blog.wpfwonderland.com. If I go to the end of my URL, and I type in the word "feed" and press Enter, I get the RSS feed view of the data, but it's still not the raw XML data that's coming from my server. What I should do to get the raw feed is right-click and then choose View Source.

Binding to an RSS feed

RSS is a very popular format. In this movie, I want to show you how to bind your application to an RSS feed. I'm inside Internet Explorer, and I have my blog opened. It's blog.wpfwonderland.com. If I go to the end of my URL, and I type in the word "feed" and press Enter, I get the RSS feed view of the data, but it's still not the raw XML data that's coming from my server. What I should do to get the raw feed is right-click and then choose View Source.

I've already done that. I've put the file inside our project, inside Visual Studio. So let's switch to Visual Studio. Here is the feed file I'm talking about, BlogExampleFeed.xml. I'll double-click on it to load it into Visual Studio. Then I'm going to make my font a little bit smaller by using the mouse wheel and the Ctrl key. If I would like to bind part of my UI to this data, I need to figure out how to get down to this XML element. You can see that the description is a child of channel, and channel is a child of RSS.

There is a mechanism called XPath built into XML that lets me drill into this data using these tags. So that's what I'm going to use. I'm also going to use something called an XMLDataProvider, which comes from WPF. Let me switch to my main UI for one minute by double-clicking on MainWindow.xaml. Then click on the Your Blog tab. Then I'll click on this text block that's right here in the UI. Let's see what's happening here on line 82. The text for this TextBlock is going to come from a data source.

In WPF, the binding keyword is how we tell the WPF engine to get the data from this title element and put it in here on the Text property of the TextBlock. The curly braces are also part of the syntax for WPF and Silverlight. Notice that this TextBlock is bound to the description. Notice some dot dot stuff going on here, because I'm going to start in my data by looking at the individual items. These are the individual blog posts here. So I'm going to start my XPath by starting here. Then I'm going to go up a level to get to the description.

I need to write some code to set up this data binding. So I'm going to switch over to my MainWindow.xaml.cs file. Then I'm going to scroll down until I find this section down here where it says private void Window_Loaded. First, I need to instantiate the XMLDataProvider. I'm doing it outside of the Window_ Loaded event, so I can use it elsewhere in my code. Then after the move current to first bits of code, I'm going to tell that provider where to find my blog.

So here I've typed in my feed location. Next, I'm going to tell the provider where to start looking inside that document, using an XPath query. So we start with the root element, RSS. Then we go to channel, and then it's item. That's where I want to start looking. I can go up and down from that location in my bindings. Then lastly, I need to tell WPF to create a DataContext. So I'm going to go to the tab where all my RSS controls live, called tab4.

I'm going to set the DataContext equal to my provider. Now what this says is any WPF element that is inside this tab has access to the data coming from this XMLDataProvider. Then I'm going to press F5 to run the application. Save my changes. Then I'm going to click on the Your Blog tab, and I was successful. I'm pulling the data from my blog, loading it into this list box. When I click on an item in the list box, it's loading the actual blog article in over in this area.

I'm also pulling information about the blog name and the blog description and putting in these text blocks. I showed you how that was happening in the WPF.xaml earlier. There is one more thing I would like to make this application do. I'd like to go to the search feeds, and when you type in a new search, I'd like to go get the RSS from the Bing site and pass that in as the source for this page. It's relatively easy to do. I just need to go up to this area where I'm downloading the string from Bing.

I'm going to say provider.Source. I'm going to change from my blog source to the new source. I think that code should do it. Debug > Start Debugging, or F5. I will come over here and type in my new search "Databinding", click on the Get RSS button, and then I'm going to on the Your Blog tab, and see if I've pulled the data from Bing. So these are the top ten sites from the RSS feed that have the word "databinding" in them.

There are plenty of details I'm leaving out about databinding in this overview. You'll find more material about binding elsewhere in this course. At this point, our application is nearly complete. We just need to determine how to deploy it to the end user's computer.

Show transcript

This video is part of

Image for Visual Studio 2010 Essential Training
Visual Studio 2010 Essential Training

86 video lessons · 30503 viewers

Walt Ritscher
Author

 
Expand all | Collapse all
  1. 2m 3s
    1. Welcome
      1m 2s
    2. Using the exercise files
      1m 1s
  2. 7m 19s
    1. Understanding the Visual Studio versions
      3m 51s
    2. Setting up your developer computer
      3m 28s
  3. 58m 2s
    1. Creating a Visual Studio project
      4m 58s
    2. Working with Solution Explorer
      6m 32s
    3. Working with big projects
      3m 53s
    4. Taking a tour of the Integrated Developer Environment (IDE)
      8m 36s
    5. Introducing drag-and-drop UI design
      7m 38s
    6. Working with the Properties window
      6m 44s
    7. Looking at Server Explorer
      7m 4s
    8. Exploring the new Help engine
      6m 41s
    9. Setting options for the IDE
      5m 56s
  4. 39m 25s
    1. Creating a simple WPF application
      1m 32s
    2. Building the UI with the editors
      9m 14s
    3. Working with the application code
      3m 37s
    4. Communicating with the web site
      7m 15s
    5. Connecting your data
      8m 4s
    6. Binding to an RSS feed
      5m 4s
    7. Packaging and deploying the application
      4m 39s
  5. 39m 46s
    1. What languages are supported in Visual Studio 2010?
      1m 17s
    2. Exploring basic settings for the Code Editor
      5m 35s
    3. Writing a C# program
      6m 48s
    4. Writing a VB program
      6m 29s
    5. Working with C++
      6m 38s
    6. Working with F Sharp
      6m 9s
    7. Font and color options
      6m 50s
  6. 1h 5m
    1. Formatting your code
      6m 43s
    2. Navigating your code
      7m 44s
    3. Using the Task List
      2m 26s
    4. Commenting your code
      2m 45s
    5. Documenting your code
      8m 26s
    6. Using IntelliSense effectively
      7m 0s
    7. Working with code snippets
      6m 25s
    8. Refactoring your code
      5m 15s
    9. Understanding code generation
      2m 10s
    10. Generating code with T4
      6m 29s
    11. Using the Class View, Class Designer, and Class Diagram tools
      5m 51s
    12. Refactoring VB with CodeRush Xpress
      4m 33s
  7. 1h 11m
    1. Working with project and item templates
      8m 38s
    2. Creating a console application
      7m 5s
    3. Creating a class library
      6m 26s
    4. Creating a web site with ASP.NET
      7m 37s
    5. Creating a rich internet application with Silverlight
      6m 57s
    6. Creating a classic Windows application with Windows Forms
      10m 31s
    7. Creating a dramatic Windows application with Windows Presentation Foundation (WPF)
      4m 41s
    8. Creating a WCF service
      9m 1s
    9. Using an existing WCF service
      6m 38s
    10. Navigation UI designs with the Document Outline view
      3m 41s
  8. 33m 18s
    1. Creating a data project with SQL Project
      6m 24s
    2. Clarifying the confusion on .NET Data
      3m 31s
    3. Using ADO.NET in your application
      6m 50s
    4. Creating typed datasets
      7m 55s
    5. Using the data binding tools
      8m 38s
  9. 30m 13s
    1. Debugging code
      9m 32s
    2. Working with the Watch and other debug windows
      7m 46s
    3. Other debugging techniques
      6m 50s
    4. IntelliTrace historical debugging in Visual Studio Ultimate
      6m 5s
  10. 17m 56s
    1. Understanding Visual Studio editions and test tools
      2m 22s
    2. Verifying your code with unit tests
      8m 58s
    3. Running performance and load tests
      6m 36s
  11. 34m 5s
    1. Building your application
      4m 19s
    2. Customizing the build process with MSBuild
      6m 36s
    3. Setting assembly information
      2m 12s
    4. Deploying a basic Windows application
      2m 19s
    5. Creating an installer with Visual Studio
      7m 39s
    6. Creating a ClickOnce application
      5m 13s
    7. Setting up IIS for deploy
      2m 9s
    8. Deploying a Silverlight or ASP.NET application
      3m 38s
  12. 14m 0s
    1. Understanding source control
      2m 9s
    2. Setting up Team Foundation Server source control
      3m 5s
    3. Using Team Foundation Server source control
      8m 46s
  13. 17m 31s
    1. Understanding the .NET Office integration
      4m 16s
    2. Making a Word 2010 application
      7m 54s
    3. Making an Excel 2010 add-in
      5m 21s
  14. 31m 34s
    1. Understanding the extensibility model in Visual Studio
      2m 17s
    2. Adding external tools to the Tools menu
      4m 42s
    3. Creating macros
      7m 16s
    4. Using the Extension Manager
      5m 1s
    5. Creating an MEF add-in
      7m 9s
    6. Deploying and installing an add-in with VSIX
      5m 9s
  15. 25m 34s
    1. Working with configuration files
      5m 37s
    2. Using the Settings Editor
      7m 30s
    3. Using the Resources Editor
      6m 59s
    4. Localizing your resources
      5m 28s
  16. 1m 17s
    1. Goodbye
      1m 17s

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
Share a link to this course

What are exercise files?

Exercise files are the same files the author uses in the course. Save time by downloading the author's files instead of setting up your own files, and learn by following along with the instructor.

Can I take this course without the exercise files?

Yes! If you decide you would like the exercise files later, you can upgrade to a premium account any time.

Become a member Download sample files See plans and pricing

Please wait... please wait ...
Upgrade to get access to exercise files.

Exercise files video

How to use exercise files.

Learn by watching, listening, and doing, Exercise files are the same files the author uses in the course, so you can download them and follow along Premium memberships include access to all exercise files in the library.


Exercise files

Exercise files video

How to use exercise files.

For additional information on downloading and using exercise files, watch our instructional video or read the instructions in the FAQ.

This course includes free exercise files, so you can practice while you watch the course. To access all the exercise files in our library, become a Premium Member.

Join now "Already a member? Log in

Are you sure you want to mark all the videos in this course as unwatched?

This will not affect your course history, your reports, or your certificates of completion for this course.


Mark all as unwatched Cancel

Congratulations

You have completed Visual Studio 2010 Essential Training.

Return to your organization's learning portal to continue training, or close this page.


OK
Become a member to add this course to a playlist

Join today and get unlimited access to the entire library of video courses—and create as many playlists as you like.

Get started

Already a member?

Become a member to like this course.

Join today and get unlimited access to the entire library of video courses.

Get started

Already a member?

Exercise files

Learn by watching, listening, and doing! Exercise files are the same files the author uses in the course, so you can download them and follow along. Exercise files are available with all Premium memberships. Learn more

Get started

Already a Premium member?

Exercise files video

How to use exercise files.

Ask a question

Thanks for contacting us.
You’ll hear from our Customer Service team within 24 hours.

Please enter the text shown below:

The classic layout automatically defaults to the latest Flash Player.

To choose a different player, hold the cursor over your name at the top right of any lynda.com page and choose Site preferencesfrom the dropdown menu.

Continue to classic layout Stay on new layout
Exercise files

Access exercise files from a button right under the course name.

Mark videos as unwatched

Remove icons showing you already watched videos if you want to start over.

Control your viewing experience

Make the video wide, narrow, full-screen, or pop the player out of the page into its own window.

Interactive transcripts

Click on text in the transcript to jump to that spot in the video. As the video plays, the relevant spot in the transcript will be highlighted.

Are you sure you want to delete this note?

No

Your file was successfully uploaded.

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.