Book Image

C# Programming Cookbook

By : Dirk Strauss
Book Image

C# Programming Cookbook

By: Dirk Strauss

Overview of this book

During your application development workflow, there is always a moment when you need to get out of a tight spot. Through a recipe-based approach, this book will help you overcome common programming problems and get your applications ready to face the modern world. We start with C# 6, giving you hands-on experience with the new language features. Next, we work through the tasks that you perform on a daily basis such as working with strings, generics, and lots more. Gradually, we move on to more advanced topics such as the concept of object-oriented programming, asynchronous programming, reactive extensions, and code contracts. You will learn responsive high performance programming in C# and how to create applications with Azure. Next, we will review the choices available when choosing a source control solution. At the end of the book, we will show you how to create secure and robust code, and will help you ramp up your skills when using the new version of C# 6 and Visual Studio
Table of Contents (21 chapters)
C# Programming Cookbook
Credits
About the Author
Acknowledgements
About the Reviewer
www.PacktPub.com
Preface
Index

Using LINQ to perform queries


Rx allow developers to use the IObservable interface that represents synchronous data streams to write queries using LINQ. To recap, Rx can be thought of as consisting of three sections:

  • Observables: The interface that brings together and represents all these data streams

  • Language-Integrated Query (LINQ): The ability to use LINQ to query these multiple data streams

  • Schedulers: Parametrizing concurrency using schedulers

In this recipe, we will be looking at the LINQ functionality of Rx in more detail.

Getting ready

As observables are just data streams, we can use LINQ to query them. In the following recipe, we will output text to the screen based on a LINQ query.

How to do it…

  1. Start by adding a new Windows Forms project to your solution:

  2. Call the project winformRx and click on the OK button:

  3. In Toolbox, search for the TextBox control and add it to your form:

  4. Finally, add a label control to your form:

  5. Right-click on your winformRx project and select Manage NuGet Packages...