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Using an existing WCF service

From: Visual Studio 2010 Essential Training

Video: Using an existing WCF service

This movie shows how to use an existing WCF service from a client application. For debugging purposes, I will keep the service project and the client project in the same solution. Remember, it's important that you run Visual Studio as an administrator if you want to test the service. I am inside Visual Studio, and I've opened a solution called UseWcfServices. If you look at the top of my Visual Studio, you'll see the word "Administrator", which means I am running in Administrator mode. There is a BookService available for my consumption inside this project.

Using an existing WCF service

This movie shows how to use an existing WCF service from a client application. For debugging purposes, I will keep the service project and the client project in the same solution. Remember, it's important that you run Visual Studio as an administrator if you want to test the service. I am inside Visual Studio, and I've opened a solution called UseWcfServices. If you look at the top of my Visual Studio, you'll see the word "Administrator", which means I am running in Administrator mode. There is a BookService available for my consumption inside this project.

This is similar to the one in the other movie in this chapter. And I have this WPF application, which is going to serve as my user interface. Let's review the user interface. I am going to come down here and look at MainWindow.xaml. Double-click. There is a list box on the left side of the screen that I wish to populate with the names of the books that are available from the service. Then when I click on this Button, I want to add a new book to the collection. The first thing I need to do is tell Visual Studio where to find my service.

I do that by going to my project and choosing Add Service Reference. Next, I need to provide the location where the address lives. In my case, it's living on the same server as my client application. It might also be out there on the Internet somewhere. I can type a URL here. Or since I know that my service lives on the same computer, I can click Discover, and wait for it to define the service. Then when I click on this expand node, it's going to launch the service-- notice down here it says WcfSvcHost-- and then it shows here is the service, there is my interface, and there are the tree operation contracts.

There is a method called AddBook, a method called GetBooks, and a method called UpdatePrices. I want to be sure that I can call this service asynchronously, so I am going to click on the Advanced button and then check this Generate asynchronous operations check box before I continue. I also need to give my Namespace a decent name. I am going to call this one BookService. Everything looks okay, so I will click OK.

At this point, I can call a service as if it were living in a local DLL. So I am going to switch over to my Code view by clicking F7, and I am going to instantiate an instance of my service right here. Then inside my Windows Loaded event, I am going to grab the data from the GetBooks method.

Here it is, GetBooks, open and close parenthesis. Then I need to tell the list box which property to show in the list. So I'll do that here by saying DisplayMemberPath= and the name of field or the name of the property. In my case, it's called Title. I am making this call on the same thread that's running inside this procedure, which in my case is the UI thread. So what's going to happen is when the application starts up, it's going to go out and call the service. And since I am doing it on the UI thread, it's going to block and wait until the service returns before it runs the next line of code, which will cause a small delay at my start up time.

I am going to press F5 to test my application. The service host starts up. Notice that I have no UI for about two seconds, and then once the service has returned, this list box now contains the data. It would be better if I didn't make this call on the UI thread, but to make it on a worker thread. So when I click on this button to add a book to the collection, I'll do that on a background thread. I'll shut this application down. Return back to my code.

On this line of code, I am going to declare a variable of my BookData type, and then my last one, I am going to choose a title, since that's what we were looking for in the list box. Say Title=. Next, I want to add the book, so I am going to call my service.

You might remember there was a method called AddBook. Because I did the asynchronous service, you see that I have an AddBook method, an AddBookAsync, and I also have this event that fires when that method returns, AddBookCompleted. So I am going to start by setting up my event procedure. I'll choose this item and choose a plus, equal. Visual Studio is offering to stub some code in for me. I am going to press Tab once to complete that line of code, and then I am going to press Tab a second time to stub in the method.

Now I am going to invoke the service, AddBookAsync, passing in the instances of my book as a property, and then I am going to go down here and update my list box when it's done. This is the same code I had up here, ItemsSource = _service, I gave this. I think it might be faster if I just copied this and pasted that in down here.

If I did everything right, this service should add a book. Let's try it out. I am going to press F5, and I will click on the book one time. There is our new book added. And just for good measure, I'll click on the book a second time to verify that it's still working. As you can see, it is fairly simple to add a reference to the service. Before I end this movie, I want to point out that there are other layers built on top of WCF, including WCF RIA Services and WCF Data Services.

Both are beyond the scope of this course, but I encourage you to check them out as you become more familiar with .NET.

Show transcript

This video is part of

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

86 video lessons · 30955 viewers

Walt Ritscher
Author

 
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  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

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