Book Image

WCF 4.5 Multi-Layer Services Development with Entity Framework

By : Mike Liu
Book Image

WCF 4.5 Multi-Layer Services Development with Entity Framework

By: Mike Liu

Overview of this book

<p>WCF is Microsoft's recommended model for building services and Entity Framework is Microsoft’s preferred ORM for accessing underlying data storages. Learning WCF and Entity Framework has become essential and critical for every software developer to survive in this SOA world.<br /><br />WCF and Entity Framework are two powerful yet complex technologies, and there are huge reference tomes out there in the market for these two technologies. With this book, you won’t get overwhelmed or scared away by tons of references; instead, you will be given a simple, easy-to-follow approach to get started. For the code solutions within this book, unlike many other WCF and EF books, where you have just one code snippet after another code snippet, all solutions in this book are fully working and completely finished. These solutions are independent of each other, yet built on top of each other, and get more and more sophisticated as the book progresses, so you can learn more advanced WCF and EF techniques easily and quickly.<br /><br />This book is a step-by-step tutorial to guide you through learning WCF, Entity Framework, LINQ, and LINQ to Entities. You will be guided to create six WCF and Entity Framework solutions from scratch, of which three are multi-layered real-world WCF service solutions, so you will not only be reading, but also be coding through the book, to gain practical experience of WCF and Entity Framework. <br /><br />Various test clients will be associated with each solution and all solutions can be built and run independently of other solutions. Clear instructions and relevant screenshots will make sure you won't get lost in the world of WCF and Entity Framework. Configuration files, host applications, test clients, and WCF services for each solution will also be available for download for you to examine, modify, and debug from the outside in. <br /><br />The book focuses on the essentials of using WCF and Entity Framework, rather than providing a reference to every single possibility. It leaves the reference material online where it belongs, and concentrates instead on practical examples, code, and advice.</p>

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WCF 4.5 Multi-Layer Services Development with Entity Framework
Mike Liu
Dec, 2012 | 394 pages
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Table of Contents (19 chapters)
WCF 4.5 Multi-Layer Services Development with Entity Framework
WCF 4.5 Multi-Layer Services Development with Entity Framework
Credits
Credits
About the Author
About the Author
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Web Services and Windows Communication Foundation
Web Services and Windows Communication Foundation
What is SOA?
Web services
Web services: standards and specifications
Windows Communication Foundation (WCF)
WCF production and development environments
Summary
2
Implementing a Basic HelloWorld WCF Service
Implementing a Basic HelloWorld WCF Service
Creating the HelloWorld solution and project
Creating the HelloWorldService service contract interface
Implementing the HelloWorldService service contract
Hosting the WCF service in IIS Express
Creating a client to consume the WCF service
Summary
3
Hosting and Debugging the HelloWorld WCF Service
Hosting and Debugging the HelloWorld WCF Service
Hosting the HelloWorld WCF service
Debugging the HelloWorld WCF service
Summary
4
Implementing a WCF Service in the Real World
Implementing a WCF Service in the Real World
Why layer a service?
Creating a new solution and project using WCF templates
Creating the service interface layer
Adding a business logic layer
Summary
5
Adding Database Support and Exception Handling
Adding Database Support and Exception Handling
Adding a data access layer
Adding error handling to the service
Summary
6
LINQ: Language Integrated Query
LINQ: Language Integrated Query
What is LINQ?
Creating the test solution and project
Datatype var
Automatic properties
Object initializer
Collection initializer
Anonymous types
Extension methods
Lambda expressions
Built-in LINQ extension methods and method syntax
LINQ query syntax and query expression
Built-in LINQ operators
Summary
7
LINQ to Entities: Basic Concepts and Features
LINQ to Entities: Basic Concepts and Features
ORM: Object-Relational Mapping
Entity Framework
LINQ to Entities
Comparing LINQ to Entities with LINQ to Objects
Comparing LINQ to SQL with LINQ to Entities
Creating a LINQ to Entities test application
Creating the data model
Querying and updating a database table
Viewing generated SQL statements
Deferred execution
Deferred (lazy) loading versus eager loading
Joining two tables
Querying a view
Summary
8
LINQ to Entities: Advanced Concepts and Features
LINQ to Entities: Advanced Concepts and Features
Calling a stored procedure
Inheritance
Handling simultaneous (concurrent) updates
Transaction support
Summary
9
Applying LINQ to Entities to a WCF Service
Applying LINQ to Entities to a WCF Service
Creating the LINQNorthwind solution
Modeling the Northwind database
Creating the business domain object project
Using LINQ to Entities 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
Summary
10
Distributed Transaction Support of WCF
Distributed Transaction Support of WCF
Creating the DistNorthwind solution
Hosting the WCF service in IIS
Testing the transaction behavior of the WCF service
Enabling distributed transaction support
Understanding the distributed transaction support of a WCF service
Testing the distributed transaction support of the WCF service
Tradeoffs of distributed transactions
Summary
11
WCF Security
WCF Security
WCF security components
Hosting a WCF service using Basic Authentication
Hosting a WCF service with Windows Authentication
WCF Security Guidance
Summary
12
Extending WCF Services
Extending WCF Services
WCF runtime architecture
Why extend WCF services?
WCF extension points
Extending a WCF service
Extending HelloWorldService
Summary
Index
Index

Anonymous types

With the feature of the object initializer and the var datatype, we can create anonymous datatypes easily in C#.

For example, we can define a variable as follows:

var a = new { Name = "name1", Address = "address1" };

At compile time, the compiler will actually create an anonymous type, as follows:

class __Anonymous1
{
    private string name;
    private string address;
    public string Name {
        get{
            return name;
        }
        set {
            name=value
        }
    }
    public string Address {
        get{
            return address;
        }
        set{
            address=value;
        }
    }
}

The name of the anonymous type is automatically generated by the compiler and cannot be referenced in the program text.

If two variables that are defined by anonymous types have the same members with the same datatypes in their initializers, these two variables have the same anonymous types. For example, if there is another variable defined as follows:

var...
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