Welcome!

Silverlight Authors: Automic Blog, Michael Kopp, AppDynamics Blog, Kaazing Blog, Steven Mandel

Related Topics: Silverlight, AJAXWorld RIA Conference & Expo

Silverlight: Article

Accessing the ASP.NET Authentication, Profile and Role Service in Silverlight

How to access the WCF application services from a directly from the Silverlight client

In ASP.NET 2.0, we introduced a very powerful set of application services in ASP.NET (Membership, Roles and profile).  In 3.5 we created a client library for accessing them from Ajax and .NET Clients and exposed them via WCF web services.    For more information on the base level ASP.NET appservices that this walk through is based on, please see Stefan Schackow's excellent book Professional ASP.NET 2.0 Security, Membership, and Role Management.

In this tutorial I will walk you through how to access the WCF application services from a directly from the Silverlight client.  This works super well if you have a site that is already using the ASP.NET application services and you just need to access them from a Silverlight client.   (Special thanks to Helen for a good chunk of this implantation)

Here is what I plan to show:

1. Login\Logout
2. Save personalization settings
3. Enable custom UI based on a user's role (for example, manager or employee)
4. A custom log-in control to make the UI a bit cleaner

image

 

You can download the completed sample solution

Part I: Login\Logout
In VS, do File\New select the Silverlight solution.  Let's call it "ApplicationServicesDemo".

image

 

We will need both the client side Silverlight project and the ASP.NET serverside project.

image

 

Let's configure our system with the test users.  To do this we will use the ASP.NET Configuration Manager.  In VS, under the Website menu, select "ASP.NET Configuration". Use this application to add a couple of users.  I created two employees:

ID:manager
password:manager!
and
ID:employee
password:employee!

image

 

To expose the ASP.NET Authentication system, let's add a new WCF service.  Because we are just going to point this at the default one that ships with ASP.NET, we don't need any code behind, so the easiest thing to do is to add a new Text File.  In the ASP.NET website, Add New Item, select Text File  and call it "AuthenticationService.svc"

image

 

Add this one line as the contents of the file.  This wires it up to the implementation that ships as part of ASP.NET.

<%@ ServiceHost Language="C#" 
Service
="System.Web.
ApplicationServices.AuthenticationService"
%>

Now in Web.config, we need to add the WCF magic to turn the service on.

  <system.serviceModel>
    <services>
      <!-- this enables the 
WCF AuthenticationService endpoint
--> <service name=
"System.Web.ApplicationServices
.AuthenticationService
" behaviorConfiguration=
"AuthenticationService
TypeBehaviors
"> <endpoint contract=
"System.Web.ApplicationServices.
AuthenticationService
" binding="basicHttpBinding"
bindingConfiguration
="userHttp" bindingNamespace=
"http://asp.net/ApplicationServices/v200"/> </service> </services> <bindings> <basicHttpBinding> <binding name="userHttp"> <!-- this is for demo only.
Https/Transport security is recommended
--> <security mode="None"/> </binding> </basicHttpBinding> </bindings> <behaviors> <serviceBehaviors> <behavior name=
"AuthenticationServiceTypeBehaviors"> <serviceMetadata httpGetEnabled="true"/> </behavior> </serviceBehaviors> </behaviors> <!-- this is needed since this service is
only supported with HTTP protocol
--> <serviceHostingEnvironment
aspNetCompatibilityEnabled
="true"/> </system.serviceModel>

Now, still in Web.config, we need to enable forms authentication.  Under the <system.web> change the authentication mode from "Windows" to "Forms".

<authentication mode="Forms" />

One last change to web.config, we need to enable authentication to be exposed via the web service.This is done by adding a System.Web.Extensions section.

  <system.web.extensions>
    <scripting>
      <webServices>
        <authenticationService enabled=
"true" requireSSL="false"/> </webServices> </scripting> </system.web.extensions>

 

Now, to consume this authentication service in Silverlight, let's open the page.xaml file and add some initial UI. Just buttons to log "employee" and "manager"  in and a textblock to show some status.

    <Grid x:Name="LayoutRoot" 
Background
="White"> <StackPanel> <Button x:Name="employeeLogIn" Width="100" Height="50" Content="Log In Employee" Click="employeeLogIn_Click"></Button> <Button x:Name="managerLogIn" Width="100" Height="50" Content="Log In Manager" Click="managerLogIn_Click"></Button> <TextBlock x:Name="statusText"></TextBlock> </StackPanel> </Grid>



Now, let's add a reference to the service we just created

Right click on the Silverlight project and select Add Service Reference

image

 

Click Discover and set the namespace to "AuthenticationService"

image

 

If you get an error at this point, it is likely something wrong with your AuthenticationService.svc or the web config, go back and double check those.

Now, let's write a little code to call that service to log us in.  First add the right using statement

using ApplicationServicesDemo.AuthenticationServices;

Then, in employeeLogIn_Click method write the code to call the service to log the employee in.  For now, we will hard code the name in password, but by the end we will be prompting the user to get this data.

First we create a the web services client class, then we call the login method asynchronously.  Remember all network calls in Silverlight are async, otherwise we'd lock up the whole browser.  Finally we sign up for the callback.

private void employeeLogIn_Click
(object sender, RoutedEventArgs e) { AuthenticationServiceClient client =
new
AuthenticationServiceClient(); client.LoginAsync("employee", "employee!", "
"
, true, "employee"); client.LoginCompleted +=
new EventHandler
<LoginCompletedEventArgs>(client_LoginCompleted); }

In the callback, for now, let's just set our status.

void client_LoginCompleted
(object sender, LoginCompletedEventArgs e) { if (e.Error != null) statusText.Text =
e.Error.ToString(); else statusText.Text = e.UserState +
" logged In result:" + e.Result;

}

Run it!  You should see a good status.  Try changing the password and ID, and see the status change to false.  It is working.

image

 

Now do the same thing for manager and you are set!

private void managerLogIn_Click
(object sender, RoutedEventArgs e) { AuthenticationServiceClient client =
new
AuthenticationServiceClient(); client.LoginCompleted +=
new
EventHandler
<LoginCompletedEventArgs>
(client_LoginCompleted); client.LoginAsync("manager",
"manager!", "", true, "manager"); }
Next Page - Part 2: Save Personalization Settings

More Stories By Brad Abrams

Brad Abrams is currently the Group Program Manager for the UI Framework and Services team at Microsoft which is responsible for delivering the developer platform that spans both client and web based applications, as well as the common services that are available to all applications. Specific technologies owned by this team include ASP.NET, Atlas and Windows Forms. He was a founding member of both the Common Language Runtime, and .NET Framework teams.

Brad has been designing parts of the .NET Framework since 1998 when he started his framework design career building the BCL (Base Class Library) that ships as a core part of the .NET Framework. He was also the lead editor on the Common Language Specification (CLS), the .NET Framework Design Guidelines, the libraries in the ECMA\ISO CLI Standard, and has been deeply involved with the WinFX and Windows Vista efforts from their beginning.

He co-authored Programming in the .NET Environment, and was editor on .NET Framework Standard Library Annotated Reference Vol 1 and Vol 2 and the Framework Design Guidelines.

Comments (2) View Comments

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


Most Recent Comments
radixweb 08/21/08 01:44:07 AM EDT

Hey Brad,

Great Post.....

Thanks...

Nico 06/04/08 06:15:34 PM EDT

This is great! Been looking forward to seeing more AJAX with Silverlight and this is right up my alley. Now that I know how it works... do you think there's a version out there with advanced escaping or is this security sound across the board?
**************
Nico del Castillo
Microsoft Security Outreach Team
www.microsoft.com/hellosecureworld7

IoT & Smart Cities Stories
Dion Hinchcliffe is an internationally recognized digital expert, bestselling book author, frequent keynote speaker, analyst, futurist, and transformation expert based in Washington, DC. He is currently Chief Strategy Officer at the industry-leading digital strategy and online community solutions firm, 7Summits.
The explosion of new web/cloud/IoT-based applications and the data they generate are transforming our world right before our eyes. In this rush to adopt these new technologies, organizations are often ignoring fundamental questions concerning who owns the data and failing to ask for permission to conduct invasive surveillance of their customers. Organizations that are not transparent about how their systems gather data telemetry without offering shared data ownership risk product rejection, regu...
Bill Schmarzo, author of "Big Data: Understanding How Data Powers Big Business" and "Big Data MBA: Driving Business Strategies with Data Science," is responsible for setting the strategy and defining the Big Data service offerings and capabilities for EMC Global Services Big Data Practice. As the CTO for the Big Data Practice, he is responsible for working with organizations to help them identify where and how to start their big data journeys. He's written several white papers, is an avid blogge...
When talking IoT we often focus on the devices, the sensors, the hardware itself. The new smart appliances, the new smart or self-driving cars (which are amalgamations of many ‘things'). When we are looking at the world of IoT, we should take a step back, look at the big picture. What value are these devices providing. IoT is not about the devices, its about the data consumed and generated. The devices are tools, mechanisms, conduits. This paper discusses the considerations when dealing with the...
Machine learning has taken residence at our cities' cores and now we can finally have "smart cities." Cities are a collection of buildings made to provide the structure and safety necessary for people to function, create and survive. Buildings are a pool of ever-changing performance data from large automated systems such as heating and cooling to the people that live and work within them. Through machine learning, buildings can optimize performance, reduce costs, and improve occupant comfort by ...
René Bostic is the Technical VP of the IBM Cloud Unit in North America. Enjoying her career with IBM during the modern millennial technological era, she is an expert in cloud computing, DevOps and emerging cloud technologies such as Blockchain. Her strengths and core competencies include a proven record of accomplishments in consensus building at all levels to assess, plan, and implement enterprise and cloud computing solutions. René is a member of the Society of Women Engineers (SWE) and a m...
Business professionals no longer wonder if they'll migrate to the cloud; it's now a matter of when. The cloud environment has proved to be a major force in transitioning to an agile business model that enables quick decisions and fast implementation that solidify customer relationships. And when the cloud is combined with the power of cognitive computing, it drives innovation and transformation that achieves astounding competitive advantage.
Poor data quality and analytics drive down business value. In fact, Gartner estimated that the average financial impact of poor data quality on organizations is $9.7 million per year. But bad data is much more than a cost center. By eroding trust in information, analytics and the business decisions based on these, it is a serious impediment to digital transformation.
In his keynote at 19th Cloud Expo, Sheng Liang, co-founder and CEO of Rancher Labs, discussed the technological advances and new business opportunities created by the rapid adoption of containers. With the success of Amazon Web Services (AWS) and various open source technologies used to build private clouds, cloud computing has become an essential component of IT strategy. However, users continue to face challenges in implementing clouds, as older technologies evolve and newer ones like Docker c...
Digital Transformation: Preparing Cloud & IoT Security for the Age of Artificial Intelligence. As automation and artificial intelligence (AI) power solution development and delivery, many businesses need to build backend cloud capabilities. Well-poised organizations, marketing smart devices with AI and BlockChain capabilities prepare to refine compliance and regulatory capabilities in 2018. Volumes of health, financial, technical and privacy data, along with tightening compliance requirements by...