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  • Book Overview & Buying WCF Multi-layer Services Development with Entity Framework - Fourth Edition
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WCF Multi-layer Services Development with Entity Framework - Fourth Edition

WCF Multi-layer Services Development with Entity Framework - Fourth Edition

By : Mike Liu
4.2 (13)
Buy this Book
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WCF Multi-layer Services Development with Entity Framework - Fourth Edition

WCF Multi-layer Services Development with Entity Framework - Fourth Edition

4.2 (13)
By: Mike Liu
Buy this Book

Overview of this book

If you are a C#, VB.NET, or C++ developer and want to get started with WCF and Entity Framework, then this book is for you. Competence in Entity Framework will be needed to follow the examples in the book, but experience in creating WCF services using Entity Framework is not necessary. Developers and architects evaluating SOA implementation technologies for their company will find this book useful.
Table of Contents (15 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Implementing a Basic HelloWorld WCF Service
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1. Implementing a Basic HelloWorld WCF Service
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The basic WCF concepts
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Creating the HelloWorld solution and project
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Defining the HelloWorldService service contract interface
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Implementing the HelloWorldService service contract
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Hosting the WCF service in IIS Express
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Creating a client to consume the WCF service
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Summary
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2. Hosting the HelloWorld WCF Service
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2. Hosting the HelloWorld WCF Service
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WCF hosting options
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Summary
3
3. Deploying the HelloWorld WCF Service
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3. Deploying the HelloWorld WCF Service
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Publishing the HelloWorldService from Visual Studio
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Publishing the HelloWorldService using a deployment package
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Summary
4
4. Debugging the HelloWorld WCF Service
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4. Debugging the HelloWorld WCF Service
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Debugging a WCF service from a client application
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Directly debugging the WCF service
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Attaching the debugger to a running WCF service process
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Debugging a WCF service hosted in the cloud
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Summary
5
5. Implementing a Three-layer WCF Service
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5. Implementing a Three-layer WCF Service
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Why layer a service?
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Creating a new solution and project using the built-in WCF service template
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Creating the service interface layer
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Adding a business logic layer
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Summary
6
6. Adding Database Support and Exception Handling
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6. Adding Database Support and Exception Handling
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Adding a data access layer
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Adding error handling to the service
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Summary
7
7. LINQ to Entities – Basic Concepts and Features
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7. LINQ to Entities – Basic Concepts and Features
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LINQ to Entities
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Creating a LINQ to Entities test application
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Creating the data model
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Querying and updating a database table
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Viewing the generated SQL statements
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Deferred execution
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Deferred execution – lazy loading versus eager loading
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Joining two tables
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Querying a view
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Summary
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8. LINQ to Entities – Advanced Concepts and Features
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8. LINQ to Entities – Advanced Concepts and Features
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Calling a stored procedure
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Handling simultaneous (concurrent) updates
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Transaction support
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Summary
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9. Applying LINQ to Entities to a WCF Service
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9. Applying LINQ to Entities to a WCF Service
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Creating the LINQNorthwind solution
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Installing Entity Framework
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Modeling the Northwind database
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Creating the business domain object project
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Using LINQ to Entities in the data access layer
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Creating the business logic layer
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Creating the service interface layer
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Testing the service with the WCF Test Client
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Testing concurrency with our own client
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Hosting the WCF service in IIS
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Summary
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10. Distributed Transaction Support of WCF
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10. Distributed Transaction Support of WCF
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Creating the DistNorthwind solution
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Hosting the WCF service in IIS
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Testing the transaction behavior of the existing WCF service
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Enabling distributed transaction support
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Understanding the distributed transaction support of a WCF service
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Testing the distributed transaction support of the new WCF service
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Trade-offs of distributed transactions
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Summary
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11. Building a RESTful WCF Service
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11. Building a RESTful WCF Service
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SOAP versus REST
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WCF REST versus the ASP.NET Web API
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Creating the RESTNorthwind solution
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Creating the RESTful service
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Testing the RESTful service in a browser
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Testing the RESTful WCF service with a C#/XAML client
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Testing the RESTful WCF service with a JavaScript client
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Summary
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12. WCF Security
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12. WCF Security
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WCF security components
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Hosting a WCF service using basic authentication
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Hosting a WCF service with Windows authentication
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Summary
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13. Extending WCF Services
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13. Extending WCF Services
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The WCF runtime architecture
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Why extend WCF services?
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WCF extension points
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Extending a WCF service
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Extending HelloWorldService
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Summary
14
Index
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Index

Deferred execution

One important thing to remember when working with LINQ to Entities is the deferred execution of LINQ.

Standard query operators differ in the timing of their execution depending on whether they return an aggregation value or a sequence of values. Those methods that return an aggregation value (for example, Average and Sum) execute immediately. Methods that return a sequence defer the query execution and return an enumerable object. These methods do not consume the target data until the query object is enumerated. This is known as deferred execution.

Checking deferred execution with SQL Profiler

To test the deferred execution of LINQ to Entities, let's first add the following method to our Program.cs file:

        static void TestDeferredExecution()
        {
            using(var NWEntities = 
               new NorthwindEntities())
           {
            // SQL is not yet executed
            var beverages =
                from p in NWEntities.Products
                where...
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