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ASP.NET Patterns every developer should know

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  1 year ago

  by konikula

  Matej Kasper

  Trutnov, Czech Republic

  Joined 3 years ago
  As I am foreign to ASP.NET, I enjoyed general section a lot. You are good speaker, possibly sometimes there was to much words used where it could be easily shorten. But generally pretty interesting reading, and of course educative. I also like you included singleton, while it complements thema importantly, so that it is visible where it all also starts or just can begin :)
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  1 year ago

  by DonXML

  Don Demsak

  Morris County, United States

  Joined 1 year ago
  DO NOT USE THIS SINGLETON EXAMPLE CODE! It is not threadsafe! I've made this mistake before, and I've seen a lot of examples of Singleton done this way, but it is not threadsafe, which will cause you problems when using it in multi-threaded applications (like ASP.Net). The best code examples of ways to implement a Singleton in .Net can be found on Jon Skeet's site, [http://www.yoda.arachsys.com/csharp/singleton.html](http://www.yoda.arachsys.com/csharp/singleton.html). There are 5 examples of Singleon there, 3 NOT to use (including the version listed here) and 2 to use. And the best thing about the valid examples, no locks! Don Demsak www.donxml.com
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  1 year ago

  by AndyGrant2005

  Andrew Grant

  United Kingdon, United Kingdom

  Joined 1 year ago
  Thanks for that. Very good link. Andy Grant
  Post was edited on 19/11/2008 11:00:42 Report abuse
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  11 months ago

  by konikula

  Matej Kasper

  Trutnov, Czech Republic

  Joined 3 years ago
  Thanks. Very interesting idea. I like "full lazy" implementation of thread safe singleton
  
  internal static readonly Singleton instance = new Singleton();
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  11 months ago

  by James Crowley

  James Crowley

  London, United Kingdom

  Joined 8 years ago
  We have added a note in the article from the Alex Homer on the implementation of Singleton pattern to clarify the issues raised! (see below, and inline in the article) > Note that this implementation does not perform locking while it creates the instance. > In reality, in this specific scenario, if a second thread should create a second instance it will > not affect operation because the content is read-only and is the same for all instances. If you absolutely > need to confirm that only one instance can ever exist, you should apply locks while checking for > and creating the instance. For more details, see [Implementing the Singleton Pattern in C#](/article/9407/) and > [Data & Object Factory Singleton Pattern](http://www.dofactory.com/Patterns/PatternSingleton.aspx)
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  7 months ago

  by Michael Okarimia

  Michael Okarimia

  , United Kingdom

  Joined 3 years ago
  Thanks! This is a great read.
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  5 months ago

  by Manjot Bawa

  Manjot Bawa

  Delhi, India

  Joined 5 months ago

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