Book Image

OData Programming Cookbook for .NET Developers

By : Juntao Cheng
Book Image

OData Programming Cookbook for .NET Developers

By: Juntao Cheng

Overview of this book

Odata (Open Data Protocol) is a Web protocol for querying and updating data that provides a way to unlock your data and free it from silos that exist in applications today. OData enables data access among a variety of applications, services, and stores by adopting existing Web technologies such as HTTP, XML, and JSON. This book deals with common OData programming cases over the Microsoft .NET Framework platform and eases the learning curve for a .NET developer to start incorporating OData in data service development.This book provides a collection of recipes that help .NET developers to get familiar with OData programming in a quick and efficient manner. The recipes cover most OData features from the former ADO.NET Data Service to the current WCF Data Service platform. In addition, all the sample cases here are based on real-world scenarios and issues that .NET developers might come across when programming with OData in application development.This book will be your handy guide with basic to advanced walkthroughs of common OData programming cases for the Microsoft .NET Framework platform. You will learn quick solutions to necessary tasks to integrate the power of OData at both server-side and client-side.This book will help you master the use of OData with .NET Framework by taking you through hands-on and practical recipes. It starts by talking about the common means for building OData services and consuming OData services in client applications. Then, some more specific topics like hosting, configuration and security are discussed. The book also covers many popular and interesting topics such as integrating OData in web applications, and developing data-driven mobile applications with OData. Moreover, you can also find quite a few recipes discussing real-world OData producers and new features in latest and future versions.Within "OData Programming Cookbook for .NET Developers", all the recipes are selected based on real-world scenarios that you will commonly come across. Each recipe covers a specific topic, going from the description of the problem, through a conceptual solution, to a solution containing sample code. By following these recipes, you can acquire how to program with OData in a simple, effective, and easy manner.
Table of Contents (15 chapters)
OData Programming Cookbook for .NET Developers
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface

Using geospatial types in OData service


WCF Data Service 5.0 (OData V3) has added support for some new primitive data types and the geospatial types are in this new type list. Geospatial data types have already been used in SQL Server 2008 R2 and will probably be included as built-in types of the next version of the .NET Framework. And in this release, a dedicated spatial class library is provided so that OData services built upon WCF Data Service 5.0 can leverage geospatial primitive types (including Geography and Geometry types) to define their data object model.

In this recipe, we will show you how to build an OData service using the new geospatial types and apply the geospatial-specific query extensions at client side.

Getting ready

The sample OData service here will use a custom class instead of an ADO.NET Entity Framework data model as the data source. In the data source class, we will only expose a single entity set, which contains some Address records (which use the GeographyPoint...