Book Image

Mastering Windows Presentation Foundation

By : Sheridan Yuen
Book Image

Mastering Windows Presentation Foundation

By: Sheridan Yuen

Overview of this book

Windows Presentation Foundation is rich in possibilities when it comes to delivering an excellent user experience. This book will show you how to build professional-grade applications that look great and work smoothly. We start by providing you with a foundation of knowledge to improve your workflow – this includes teaching you how to build the base layer of the application, which will support all that comes after it. We’ll also cover the useful details of data binding. Next, we cover the user interface and show you how to get the most out of the built-in and custom WPF controls. The final section of the book demonstrates ways to polish your applications, from adding practical animations and data validation to improving application performance. The book ends with a tutorial on how to deploy your applications and outlines potential ways to apply your new-found knowledge so you can put it to use right away.
Table of Contents (19 chapters)
Mastering Windows Presentation Foundation
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Separating the Data Access Layer


Now that we've had a look at providing a variety of functionality through our base classes and interfaces, let's investigate how we can provide the Separation of Concerns that is crucial when using the MVVM pattern. Once again, we turn to the humble interface to help us to achieve this. Let's view a simplified example:

using System; 
using CompanyName.ApplicationName.DataModels; 
 
namespace CompanyName.ApplicationName.Models.Interfaces 
{ 
  public interface IDataProvider 
  { 
    User GetUser(Guid id); 
 
    bool SaveUser(User user); 
  } 
} 

We start off with a very simple interface. Of course, real applications will have a great many more methods than this, but the principal is the same, regardless of the complexity of the interface. So here, we just have a GetUser and a SaveUser method that our DataProvider classes need to implement. Now let's look at the ApplicationDataProvider class:

using...