WCF Multi-layer Services Development with Entity Framework Fourth Edition Table of Contents WCF Multi-layer Services Development with Entity Framework Fourth Edition Credits About the Author About the Reviewers www.PacktPub.com Support files, eBooks, discount offers, and more Why subscribe? Free access for Packt account holders Instant updates on new Packt books Preface What this book covers What you need for this book Who this book is for Conventions Reader feedback Customer support Downloading the example code Errata Piracy Questions 1. Implementing a Basic HelloWorld WCF Service The basic WCF concepts Address Binding Contract The service contract The operation contract The message contract The data contract The fault contract Endpoint Behavior Hosting Channels Metadata WCF environments Creating the HelloWorld solution and project Defining the HelloWorldService service contract interface Implementing the HelloWorldService service contract Hosting the WCF service in IIS Express Creating the host application Testing the host application IIS Express Modifying the Web.config file Starting the host application Creating a client to consume the WCF service Creating the client application project Generating the proxy and configuration files Customizing the client application Running the client application Setting the service application to autostart Summary 2. Hosting the HelloWorld WCF Service WCF hosting options Hosting the service in a managed application Hosting the service in a console application Consuming the service hosted in a console application Hosting the service in a Windows service Hosting the service in IIS using the HTTP protocol Preparing the folders and files Starting IIS Enabling WCF services on Windows 8 Creating the IIS application Starting the WCF service in IIS Testing the WCF service hosted in IIS using the HTTP protocol Hosting the service in IIS using the TCP protocol Benefits of hosting a WCF service using the TCP protocol Preparing the folders and files Enabling the TCP WCF activation for the host machine Creating the IIS application Testing the WCF service hosted in IIS using the TCP protocol Summary 3. Deploying the HelloWorld WCF Service Publishing the HelloWorldService from Visual Studio Publishing from Visual Studio to an on-premise computer Creating the publishing project Publishing the HelloWorldService Testing the service Publishing to the cloud Creating the profile to be published Creating the cloud website Publishing the HelloWorldService to the cloud website Testing the service Publishing the HelloWorldService using a deployment package Creating the package Installing the package Testing the service Summary 4. Debugging the HelloWorld WCF Service Debugging a WCF service from a client application Starting the debugging process Debugging the client application Stepping into the WCF service Directly debugging the WCF service Starting the WCF service in the debugging mode Starting the client application Attaching the debugger to a running WCF service process Running the WCF service and client applications in a non-debugging mode Debugging the WCF service hosted in IIS Debugging a WCF service hosted in the cloud Enabling debugging of the service Attaching to the cloud service process Debugging the service Summary 5. Implementing a Three-layer WCF Service Why layer a service? Creating a new solution and project using the built-in WCF service template Creating the WCF service project Creating the service interface layer Creating service interfaces Creating data contracts Implementing the service contracts Modifying the App.config file Testing the service using the WCF Test Client Testing the service using your own client Adding a business logic layer Adding the business domain object project Adding the business logic project Calling the business logic layer from the service interface layer Testing the WCF service with a business logic layer Summary 6. Adding Database Support and Exception Handling Adding a data access layer Creating the data access layer project Calling the data access layer from the business logic layer Preparing the database Adding the connection string to the configuration file Querying the database using GetProduct Testing the GetProduct method Updating the database using UpdateProduct Testing the UpdateProduct method Adding error handling to the service Adding a fault contract Throwing a fault contract exception Updating the client program to catch the fault exception Changing the exception options Testing the fault exception Summary 7. LINQ to Entities – Basic Concepts and Features LINQ to Entities Creating a LINQ to Entities test application Creating the data model Installing Entity Framework Adding a LINQ to Entities item to the project The generated LINQ to Entities classes Querying and updating a database table Querying records Updating records Inserting records Deleting records Running the program Viewing the generated SQL statements Viewing the SQL statements using ToString Viewing the SQL statements using SQL Profiler Deferred execution Checking deferred execution with SQL Profiler Deferred execution for aggregation methods Deferred execution for aggregation methods within sequence expressions Deferred execution – lazy loading versus eager loading Lazy loading by default Eager loading with the Include method Comparing lazy loading and eager loading Joining two tables Querying a view Summary 8. LINQ to Entities – Advanced Concepts and Features Calling a stored procedure Mapping a stored procedure to a new entity class Adding a stored procedure to the model Querying a stored procedure Mapping a stored procedure to an existing entity class Handling simultaneous (concurrent) updates Detecting conflicts using a data column The Concurrency Mode property Adding another entity data model Writing the test code Testing the conflicts Turning on concurrency verification Detecting conflicts using a version column Adding a version column Modeling the Products table with a version column Writing the test code Testing the conflicts Transaction support Implicit transactions Explicit transactions Summary 9. Applying LINQ to Entities to a WCF Service Creating the LINQNorthwind solution Installing Entity Framework Modeling the Northwind database Creating the business domain object project Using LINQ to Entities in the data access layer Adding a reference to the BDO project Creating GetProduct in the data access layer Creating UpdateProduct in the data access layer Creating the business logic layer Creating the service interface layer Testing the service with the WCF Test Client Testing concurrency with our own client Hosting the WCF service in IIS Creating the test client Implementing the GetProduct functionality Implementing the UpdateProduct functionality Testing the GetProduct and UpdateProduct operations Testing concurrent updates manually Testing concurrent updates automatically Summary 10. Distributed Transaction Support of WCF Creating the DistNorthwind solution Hosting the WCF service in IIS Testing the transaction behavior of the existing WCF service Creating a client to call the WCF service sequentially Testing the sequential calls to the WCF service Wrapping the WCF service calls in one transaction scope Testing the multiple database support of the WCF service Configuring a remote database on a remote machine Creating a new WCF service Calling the new WCF service in the client application Testing the WCF service with two databases Enabling distributed transaction support Enabling transaction flow in service binding Enabling transaction flow on the service hosting the application Modifying the service operation contract to allow a transaction flow Modifying the service operation implementation to require a transaction scope Understanding the distributed transaction support of a WCF service Testing the distributed transaction support of the new WCF service Configuring the Microsoft Distributed Transaction Coordinator Configuring the firewall Propagating a transaction from the client to the WCF service Testing the distributed transaction support with one database Testing the distributed transaction support with two databases Trade-offs of distributed transactions Summary 11. Building a RESTful WCF Service SOAP versus REST WCF REST versus the ASP.NET Web API Creating the RESTNorthwind solution Creating the RESTful service Defining RESTful service contracts Implementing the RESTful service Modifying the configuration file Testing the RESTful service in a browser Testing the RESTful WCF service with a C#/XAML client Creating the C#/XAML client Implementing the GetProduct method of the C#/XAML client Testing the GetProduct method of the C#/XAML client Implementing the UpdateProduct method of the C#/XAML client Testing the UpdateProduct method of the C#/XAML client Testing the RESTful WCF service with a JavaScript client Creating the JavaScript client Testing the service with jQuery Installing jQuery to the client project Implementing the GetProductJQuery method Testing the GetProductJQuery method of the JavaScript client Implementing the UpdateProductJQuery method Testing the UpdateProductJQuery method of the JavaScript client Testing the service with WinJS Implementing the GetProductWinJS method Testing the GetProductWinJS method of the JavaScript client Implementing the UpdateProductWinJS method Testing the UpdateProductWinJS method of the JavaScript client Summary 12. WCF Security WCF security components WCF authorization WCF auditing WCF transfer security WCF security modes