Book Image

Microsoft .NET Framework 4.5 Quickstart Cookbook

By : Jose Luis Latorre
Book Image

Microsoft .NET Framework 4.5 Quickstart Cookbook

By: Jose Luis Latorre

Overview of this book

With about ten years since its first release, Microsoft's .NET Framework 4.5 is one of the most solid development technologies to create casual, business, or enterprise applications. It has evolved into a very stable framework and solid framework for developing applications, with a solid core, called the CLR (Common Language Runtime) Microsoft .NET Framework 4.5 includes massive changes and enables modern application and UI development."Microsoft .Net Framework 4.5 Quickstart Cookbook" aims to give you a run through the most exciting features of the latest version. You will experience all the flavors of .NET 4.5 hands on. The “How-to” recipes mix the right ingredients for a final taste of the most appetizing features and characteristics. The book is written in a way that enables you to dip in and out of the chapters.The book is full of practical code examples that are designed to clearly exemplify the different features and their applications in real-world development. All the chapters and recipes are progressive and based on the fresh features on .NET Framework 4.5.The book will begin by teaching you to build a modern UI application and improve it to make it Windows 8 Modern UI apps lifecycle model-compliant. You will create a portable library and throttle data source updating delays. Towards the end of the book, you will create you first Web API.
Table of Contents (19 chapters)
Microsoft .NET Framework 4.5 Quickstart Cookbook
About the Author
About the Reviewers

Controlling the timeout in regular expressions

.NET 4.5 gives us improved control on the resolution of regular expressions so we can react when they don't resolve on time. This is extremely useful if we don't control the regular expressions/patterns, such as the ones provided by the users.

A badly formed pattern can have bad performance due to excessive backtracking and this new feature is really a lifesaver.

How to do it...

Next we are going to control the timeout in the regular expression, where we will react if the operation takes more than 1 millisecond:

  1. Create a new Visual Studio project of type Console Application, named caRegexTimeout.

  2. Open the Program.cs file and add a using clause for using regular expressions:

    Using System.Text.RegularExpressions;
  3. Add the following method and call it from the Main function:

    private static void ExecuteRegexExpression() {
    bool RegExIsMatch = false;
    string testString = "One Tile to rule them all, One Tile to find them… ";
    string RegExPattern = @"([a-z ]...