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Mastering LOB Development for Silverlight 5: A Case Study in Action

You're reading from   Mastering LOB Development for Silverlight 5: A Case Study in Action Develop a full LOB Silverlight 5 application from scratch with the help of expert advice and an accompanying case study with this book and ebook

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Product type Paperback
Published in Feb 2012
Publisher Packt
ISBN-13 9781849683548
Length 430 pages
Edition 1st Edition
Languages
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Table of Contents (19) Chapters Close

Mastering LOB Development for Silverlight 5: A Case Study in Action
Credits
Foreword
About the Authors
About the Reviewers
www.PacktPub.com
Preface
1. Express Introduction to Silverlight FREE CHAPTER 2. Forms and Browsing 3. Data Binding 4. Architecture 5. RIA Services Data Access 6. Out of Browser (OOB) Applications 7. Testing your LOB Application 8. Error Control 9. Integration with other Web Applications 10. Consuming Web Services 11. Security Index

Validation


One of the most important parts of the application is the correct implementation of validations in our business logic. These can be simple details, such as the fact that the client must provide their name and e-mail address to sign up, or that before selling a book, it must be in stock.

In RIA Services, validations can be defined on two levels:

  • In entities, via DataAnnotations.

  • In our Domain Service, server or asynchronous validations via Invoke.

DataAnnotations

The space named System.ComponentModel.DataAnnotations implements a series of attributes allowing us to add validation rules to the properties of our entities. The following table shows the most outstanding ones:

Validation Attribute

Description

DataTypeAttribute

Specifies a particular type of data such as date or an e-mail

EnumDataTypeAttribute

Ensures that the value exists in an enumeration

RangeAttribute

Designates minimum and maximum constraints

RegularExpressionAttribute

Uses a regular expression to determine...

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