Async in C# 5.0. Unleash the Power of Async

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Autor:: Alex Davies

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If you’re writing one of several applications that call for asynchronous programming, this concise hands-on guide shows you how the async feature in C# 5.0 can make the process much simpler. Along with a clear introduction to asynchronous programming, you get an in-depth look at how the async feature works and why you might want to use it in your application.

Written for experienced C# programmers—yet approachable for beginners—this book is packed with code examples that you can extend for your own projects.

Write your own asynchronous code, and learn how async saves you from this messy chore
Discover new performance possibilities in ASP.NET web server code
Explore how async and WinRT work together in Windows 8 applications
Learn the importance of the await keyword in async methods
Understand which .NET thread is running your code—and at what points in the program
Use the Task-based Asynchronous Pattern (TAP) to write asynchronous APIs in .NET
Take advantage of parallel computing in modern machines
Measure async code performance by comparing it with alternatives

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Szczegóły książki

ISBN Ebooka:: 978-14-493-3712-4, 9781449337124
Data wydania ebooka :: 2012-09-07 Data wydania ebooka często jest dniem wprowadzenia tytułu do sprzedaży i może nie być równoznaczna z datą wydania książki papierowej. Dodatkowe informacje możesz znaleźć w darmowym fragmencie. Jeśli masz wątpliwości skontaktuj się z nami sklep@helion.pl.
Język publikacji:: angielski
Rozmiar pliku ePub:: 1.2MB
Rozmiar pliku Mobi:: 2.8MB

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Kategorie:
Programowanie » C# - Programowanie

Spis treści książki

Async in C# 5.0
SPECIAL OFFER: Upgrade this ebook with OReilly
Preface
- Intended Audience
- How to Read This Book
- Conventions Used in This Book
- Using Code Examples
- Safari Books Online
- How to Contact Us
- Acknowledgments
1. Introduction
- Asynchronous Programming
- Whats So Great About Asynchronous Code?
- What Is Async?
- What Async Does
- Async Doesnt Solve Everything
2. Why Programs Need to Be Asynchronous
- Desktop User Interface Applications
  - An Analogy: The Cafe
- Web Application Server Code
  - Another Analogy: The Restaurant Kitchen
- Silverlight, Windows Phone, and Windows 8
- Parallel Code
- An Example
3. Writing Asynchronous Code Manually
- Some Asynchronous Patterns Used in .NET
- The Simplest Asynchronous Pattern
- An Introduction to Task
- The Problem with Manual Asynchrony
- Converting the Example to Use Manual Asynchronous Code
4. Writing Async Methods
- Converting the Favicon Example to Async
- Task and await
- Async Method Return Types
- Async, Method Signatures, and Interfaces
- The return Statement in Async Methods
- Async Methods Are Contagious
- Async Anonymous Delegates and Lambdas
5. What await Actually Does
- Hibernating and Resuming a Method
- The State of the Method
- Context
- Where await Cant Be Used
  - catch and finally Blocks
  - lock Blocks
  - LINQ Query Expressions
  - Unsafe Code
- Exception Capture
- Async Methods Are Synchronous Until Needed
6. The Task-Based Asynchronous Pattern
- What the TAP Specifies
- Using Task for Compute-Intensive Operations
- Creating a Puppet Task
- Interacting with Old Asynchronous Patterns
- Cold and Hot Tasks
- Up-Front Work
7. Utilities for Async Code
- Delaying for a Period of Time
- Waiting for a Collection of Tasks
- Waiting for Any One Task from a Collection
- Creating Your Own Combinators
- Cancelling Asynchronous Operations
- Returning Progress During an Asynchronous Operation
8. Which Thread Runs My Code?
- Before the First await
- During the Asynchronous Operation
- SynchronizationContext in Detail
- await and SynchronizationContext
- The Lifecycle of an Async Operation
- Choosing Not to Use SynchronizationContext
- Interacting with Synchronous Code
9. Exceptions in Async Code
- Exceptions in Async Task-Returning Methods
- Unobserved Exceptions
- Exceptions in Async void Methods
- Fire and Forget
- AggregateException and WhenAll
- Throwing Exceptions Synchronously
- finally in Async Methods
10. Parallelism Using Async
- await and locks
- Actors
- Using Actors in C#
- Task Parallel Library Dataflow
11. Unit Testing Async Code
- The Problem with Unit Testing in Async
- Writing Working Async Tests Manually
- Using Unit Test Framework Support
12. Async in ASP.NET Applications
- Advantages of Asynchronous Web Server Code
- Using Async in ASP.NET MVC 4
- Using Async in Older Versions of ASP.NET MVC
- Using Async in ASP.NET Web Forms
13. Async in WinRT Applications
- What Is WinRT?
- IAsyncAction and IAsyncOperation<T>
- Cancellation
- Progress
- Providing Asynchronous Methods in a WinRT Component
14. The Async Compiler Transformin Depth
- The stub Method
- The State Machine Struct
- The MoveNext Method
  - Your Code
  - Transforming Returns to Completions
  - Get to the Right Place in the Method
  - Pausing the Method for the await
  - Resuming after the Await
  - Completing Synchronously
  - Catching Exceptions
  - More Complicated Code
- Writing Custom Awaitable Types
- Interacting with the Debugger
15. The Performance of Async Code
- Measuring Async Overhead
- Async Versus Blocking for a Long-Running Operation
- Optimizing Async Code for a Long-Running Operation
- Async Versus Manual Asynchronous Code
- Async Versus Blocking Without a Long-Running Operation
- Optimizing Async Code Without a Long-Running Operation
- Async Performance Summary
About the Author
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