Friday, March 29, 2013

What's New in the .NET Framework 4.0

What's New in the .NET Framework 4.0

·         Data
·         Windows Communication Foundation
·         Windows Workflow Foundation


ADO.NET provides new features for the Entity Framework, including persistence-ignorant objects, functions in LINQ queries, and customized object layer code generation.

Dynamic Data
For ASP.NET 4, Dynamic Data has been enhanced to give you even more power for quickly building data-driven Web sites. This includes the following:
·         Automatic validation that is based on constraints that are defined in the data model.
·         The ability to easily change the markup that is generated for fields in the GridView and DetailsView controls by using field templates that are part of a Dynamic Data project.

WCF Data Services
ADO.NET Data Service has been renamed to WCF Data Services, and has the following new features
·         Data binding.
·         Counting entities in an entity set.
·         Server-driven paging.
·         Query projections.
·         Custom data service providers.
·         Streaming of binary resources.

2. Windows Communication Foundation
Windows Communication Foundation (WCF) provides the following improvements:
·         Configuration-based activation: Removes the requirement for having an .svc file.
·         System.Web.Routing integration: Gives you more control over your service's URL by allowing the use of extensionless URLs.
·         Multiple IIS site bindings support: Allows you to have multiple base addresses with the same protocol on the same Web site.
·         Routing Service: Allows you to route messages based on content.
·         Support for WS-Discovery: Allows you to create and search for discoverable services.
·         Standard endpoints: Predefined endpoints that allow you to specify only certain properties.
·         Workflow services: Integrates WCF and WF by providing activities to send and receive messages, the ability to correlate messages based on content, and a workflow service host.
·         WCF REST features:
·         Web HTTP caching: Allows caching of Web HTTP service responses.
·         Web HTTP formats support: Allows you to dynamically determine the best format for a service operation to respond in.
·         Web HTTP services help page: Provides an automatic help page for Web HTTP services, similar to the WCF service help page.
·         Web HTTP error handling: Allows Web HTTP Services to return error information in the same format as the operation.
·         Web HTTP cross-domain JavaScript support: Allows use of JSON Padding (JSONP).
·         Simplified configuration: Reduces the amount of configuration a service requires

3.  Windows Workflow Foundation
Windows Workflow Foundation (WF) provides improvements in the following areas:
·         Improved workflow activity model: The Activity class provides the base abstraction of workflow behavior.
·         Rich composite activity options: Workflows benefit from new flow-control activities that model traditional flow-control structures, such as Flowchart, TryCatch, and Switch(Of T).
·         Expanded built-in activity library: New features of the activity library include new flow-control activities, activities for manipulating member data, and activities for controlling transactions.
·         Explicit activity data model: New options for storing or moving data include variable and directional arguments.
·         Enhanced hosting, persistence, and tracking options: Hosting enhancements include more options for running workflows, explicit persistence using the Persistactivity, persisting without unloading, preventing persistence by using no-persist zones, using ambient transactions from the host, recording tracking information to the event log, and resuming pending workflows by using a Bookmark object.
·         Easier ability to extend the WF Designer: The new WF Designer is built on Windows Presentation Foundation (WPF) and provides an easier model to use when rehosting the WF Designer outside of Visual Studio.