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![Extensibility
MEF – Managed Extensibility Framework
Export it - Metadata
[ExportMetadata(“Location”,Location.Top)]
[Export(typeof(UserControl))]
public class Widget1 : UserControl
{
public string Message {
get{return(string) Button.Content;}
set{Button.Content=value;}
}
}
Widget1 Export](https://image.slidesharecdn.com/nunogodinho-100120200136-phpapp02/75/Nuno-Godinho-44-2048.jpg)
![Extensibility
MEF – Managed Extensibility Framework
Import it - Metadata
[Export(typeof(UserControl))]
public class MainPage: UserControl
{
[ImportMany(typeof(UserControl))]
public IEnumerable<Lazy<UserControl, IWidgetMetadata>
{
get;set;
}
}
Main
ImportMany
Page](https://image.slidesharecdn.com/nunogodinho-100120200136-phpapp02/75/Nuno-Godinho-45-2048.jpg)
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Nuno Godinho
- 1. Developing Line-of-Business Applications withMicrosoft Silverlight Nuno Godinho Nuno.Godinho@sapo.pt
- 2. Agenda Introduction RecommendedPattern Communications Beyond the Browser Extensibility Q&A
- 3. About Me Nuno FilipeGodinho Independent Consultant Mail: Nuno.Godinho@sapo.pt Nuno.Godinho@itech4all.com Blogs: http://pontonetpt.com/blogs/nunogodinho http://xamlpt.com/blogs/nunogodinho http://weblogs.asp.net/nunogodinho http://msmvps.org/blogs/nunogodinho Twitter: @NunoGodinho
- 4. Agenda Introduction RecommendedPattern Communications Beyond the Browser Extensibility Q&A
- 5. Introduction Problem Statement Problems ◦ N-Tier ◦ Controls ◦ Rich Text Support ◦ Multi-language Support ◦ Customer Devices Interaction ◦ Communications ◦ Extensibility ◦ Offline Support ◦ Interoperability
- 6. Introduction Challenges using N-Tierapplications LoB applications use data that needs to flow across tiers Created and used through basic CRUD operations In an internet application, there is a trust boundary between the client and the mid-tier server Important to have a well defined and secured resources that are available to the client tier and also what operations are permitted
- 7. Introduction Challenges using N-Tierapplications The validation needs to run on Client and On Server as well as on Mid-Tiers Common validation across the tiers Services that may be shared with other applications
- 9. Introduction Vision and Goals Simplify RIA-style application development ◦ n-tier is hard, and un-natural ◦ Focus on data-driven apps Bring ASP.NET-style productivity to RIA development ◦ Building blocks for data, security, etc. ◦ Focus on scenarios
- 10. Introduction Value Propositions Focus on data in an end-to-end manner A unified story for client and server development A prescriptive framework that targets key scenarios, and leads the common developer to a pit of success
- 11. Introduction Value Propositions Simplify application development across tiers and trust boundary ◦ Provides a set of tools to build the multiple tiers of an application together ◦ Application logic remains aware of tier and trust boundaries ◦ Uses the end-to-end flow of data and metadata described earlier ◦ Code generation and shared code Enhance the experience by providing multiple choices for sharing logic while respecting tier and trust boundaries
- 12. Introduction A Unified Storyfor Client and Server Client is an extension of the server Service A single logical application Rich Internet Application Browser Application Presentation App Data Access HTML Network Logic Logic Layer DB Services Other Applications
- 13. Introdution Value Propositions Define and support a pattern for exposing a set of operations on resources DomainService ◦ Define a set of operations on resources Framework and Tools ◦ Collaborate to generate code for a corresponding client-tier ◦ Services for authentication and user settings can be used out-of-the box
- 14. Introduction A Prescriptive Pattern Services Rich Internet Application Presentation Domain Network Domain App Data Access Logic Context Service Logic Layer Under the covers infrastructure DB
- 15. Introduction A Single Patternthat Scales and Grows Support for multiple presentation tiers and data access technologies .NET Clients Databases Silverlight, WPF ADO.NET, ORMs (LTS, EF, …) Standards Clients JavaScript CLR App Lists/Objects Logic Repository Server (nHibernate, …) Rendering HTML, SEO, Printing, … Services REST/SOAP SOAP, Unit Test (Azure, …) Services XML, Code JSON, WCF Binary
- 16.
- 17. Agenda Introduction RecommendedPattern Communications Beyond the Browser Extensibility Q&A
- 18.
- 19. Recommended Pattern MVVM Why? ◦ Separation of concerns ◦ Better Workflow between Developer and Designer ◦ Easier Testability Why not MVC? ◦ We need to have access to the Code-Behind and MVC doesn’t support that, only Code-Behind Pattern does, but doesn’t delivers easy separation of concerns
- 20. Recommended Pattern MVVM Display data in Controls UI Friendly Entities, UI State, Actions Entities representing data
- 21. MVVM Implementation inSilverlight
- 22. Agenda Introduction RecommendedPattern Communications Beyond the Browser Extensibility Q&A
- 23. Communication Unified Programming Model ASMX & WSE .NET Remoting Interop Extensibility with other Location Platforms & WS-* transparency Attribute- Message- Based Oriented Programming REST / HTTP Programming Programming Enterprise System.Messaging Services HTTP Services
- 24.
- 25. Communications WCF RIA Services Framework, tools and services with prescriptive pattern for n- tier applications Trust Boundary Web Service Data Access App App View Layer Logic Logic (DAL) Database
- 26. Communications WCF RIA Services Design-time view Solution (Application) Server project Client project Entities Entities Build, reflect Data & code-gen Views Access Domain Domain Layer Service Context (DAL)
- 27. Communications Run-time view (entitylifecycle) Application Web server Silverlight Query Load Data Entities Domain Entities Access Domain Views Layer Service Context Submit Submit (DAL) Results Results
- 28. Communications Services Authentication Roles User profile All integrate w/ ASP.NET infrastructure
- 29.
- 30. Agenda Introduction RecommendedPattern Communications Beyond the Browser Extensibility Q&A
- 31. Beyond the Browser Out-of-Browser Applications Trusted Applications
- 32. Beyond the Browser Out-of-Browser– Already on Silverlight 3 Configuration Based AppManifest.xml Can be enabled in an existing application without rebuilding Install option on its right-click menu Can run without a network connection You can implement network detection and provide offline support when a connection is unavailable
- 33. Beyond the Browser Out-of-Browser Windowing API WebBrowser control HtmlBrush Notification (aka. Toast)
- 34. Beyond the Browser TrustedApplications OOB with elevated privileges COM Interop in Windows File system access Cross-domain networking access Full keyboard support in Full-Screen Mode
- 35.
- 36. Agenda Introduction RecommendedPattern Communications Beyond the Browser Extensibility Q&A
- 37. Extensibility Prism v2 MEF – Managed Extensibility Framework
- 38. Extensibility Prism v2 Prism is a set of options Use what you want and ignore the rest ◦ Example: Choose Modules and Commanding, but ignore Event Aggregation and Regions
- 39. Extensibility Prism v2 Prism Technical Concepts
- 40. Extensibility MEF – ManagedExtensibility Framework A new library in Silverlight 4 for building applications that can be incrementally extended.
- 41. Extensibility MEF – ManagedExtensibility Framework An Application is built of parts.
- 42. Extensibility MEF – ManagedExtensibility Framework Export it. Import it. Compose it.
- 44. Extensibility MEF – ManagedExtensibility Framework Export it - Metadata [ExportMetadata(“Location”,Location.Top)] [Export(typeof(UserControl))] public class Widget1 : UserControl { public string Message { get{return(string) Button.Content;} set{Button.Content=value;} } } Widget1 Export
- 45. Extensibility MEF – ManagedExtensibility Framework Import it - Metadata [Export(typeof(UserControl))] public class MainPage: UserControl { [ImportMany(typeof(UserControl))] public IEnumerable<Lazy<UserControl, IWidgetMetadata> { get;set; } } Main ImportMany Page
- 46. MEF – ManagedExtensibility Framework
- 47. Agenda Introduction RecommendedPattern Communications Beyond the Browser Extensibility Q&A
- 49. Nuno Filipe Godinho IndependentConsultant Mail: Nuno.Godinho@sapo.pt Nuno.Godinho@itech4all.com