Comments for Talk Nerdy To Me - Java, C#, .Net http://www.gavaghan.org/blog Mike Gavaghan blogs on Java, C#, .Net, and the software industry Thu, 03 Jan 2013 16:01:27 +0000 http://wordpress.org/?v=2.9.2 hourly 1 Comment on Intercepting Add and Remove of C# Event Delegates by Bruno Oliveira http://www.gavaghan.org/blog/2007/07/25/intercepting-add-and-remove-of-c-event-delegates/comment-page-1/#comment-917 Bruno Oliveira Thu, 03 Jan 2013 16:01:27 +0000 http://www.gavaghan.org/blog/2007/07/25/intercepting-add-and-remove-of-c-event-delegates/#comment-917 This actually seams to solve me a problem easily...i didn't tried yet but here it is: This is the scenario: I have a shared proxy, lets call this PROXY1, that subscribes an event of a third-party component WORKER1, and I have multiple clients listening on PROXY1 events. This is the problem: I need to free PROXY1 through Garbage collector finalizer, I can't dispose it by calling Dispose() because I don't known when all clients are finished using the PROXY1 events. Solution: Implement explicitly add, remove of PROXY1 events, and when listeners = zero unsubscribe the WORKER1 event, if listners != zero subscribe WORKER1 event. Garbage collector will collect PROXY1 when no references points to it, and that happens when it unsubscribes WORKER1 event. This actually seams to solve me a problem easily…i didn’t tried yet but here it is:

This is the scenario:

I have a shared proxy, lets call this PROXY1, that subscribes an event of a third-party component WORKER1, and I have multiple clients listening on PROXY1 events.

This is the problem:

I need to free PROXY1 through Garbage collector finalizer, I can’t dispose it by calling Dispose() because I don’t known when all clients are finished using the PROXY1 events.

Solution:

Implement explicitly add, remove of PROXY1 events, and when listeners = zero unsubscribe the WORKER1 event, if listners != zero subscribe WORKER1 event.

Garbage collector will collect PROXY1 when no references points to it, and that happens when it unsubscribes WORKER1 event.

]]> Comment on Understanding SSL – Part 1: Certificates and Keys by Ankit@Android http://www.gavaghan.org/blog/2009/10/14/understanding-ssl-%e2%80%93-part-1-certificates-and-keys/comment-page-1/#comment-916 Ankit@Android Wed, 02 Jan 2013 11:13:07 +0000 http://www.gavaghan.org/blog/2009/10/14/understanding-ssl-%e2%80%93-part-1-certificates-and-keys/#comment-916 This helped me in creating aX509 distinguished name. Thank you This helped me in creating aX509 distinguished name. Thank you

]]> Comment on Intercepting Add and Remove of C# Event Delegates by Marc Gravell http://www.gavaghan.org/blog/2007/07/25/intercepting-add-and-remove-of-c-event-delegates/comment-page-1/#comment-914 Marc Gravell Sat, 22 Dec 2012 08:41:19 +0000 http://www.gavaghan.org/blog/2007/07/25/intercepting-add-and-remove-of-c-event-delegates/#comment-914 Firstly, you don't need to use Combine; += and -= work fine (the same as how, with strings, + is implemented via string.Concat). Typical uses: - sparse events via EventHandlerList - event proxying Also, note that the compiler-generated boilerplate is thread-safe, but the code here *is not*. S basically, the simpler "field-like event" version should be used by default (in preference to adding a delegate backing field). With regards the comment about serialization: that can be handled too, by using the "field:" prefix on an attribute, for example: [field:NonSerialized] public event EventHandler SomeEvent; Firstly, you don’t need to use Combine; += and -= work fine (the same as how, with strings, + is implemented via string.Concat).

Typical uses:

- sparse events via EventHandlerList
- event proxying

Also, note that the compiler-generated boilerplate is thread-safe, but the code here *is not*. S basically, the simpler “field-like event” version should be used by default (in preference to adding a delegate backing field).

With regards the comment about serialization: that can be handled too, by using the “field:” prefix on an attribute, for example:

[field:NonSerialized] public event EventHandler SomeEvent;

]]> Comment on C#, GPS Receivers, and Geocaching: Vincenty’s Formula by Henri de Feraudy http://www.gavaghan.org/blog/2007/08/06/c-gps-receivers-and-geocaching-vincentys-formula/comment-page-1/#comment-912 Henri de Feraudy Thu, 06 Sep 2012 08:11:12 +0000 http://www.gavaghan.org/blog/2007/08/06/c-gps-receivers-and-geocaching-vincentys-formula/#comment-912 Readers my like to know that a recent C++ open source development is GeographicLib, whose author claims is far more accurate than Vincenty's formula. See http://geographiclib.sourceforge.net/. Nevertheless the code you have presented is much easier to get into, and for distances of less than a 100km might be accurate, but I havent done any comparisons. Readers my like to know that a recent C++ open source development is GeographicLib, whose author claims is far more accurate than Vincenty’s formula. See http://geographiclib.sourceforge.net/.
Nevertheless the code you have presented is much easier to get into, and for distances of less than a 100km might be accurate, but I havent done any comparisons.

]]> Comment on Use INotifyPropertyChanged with BindingList by Kurtis Lininger http://www.gavaghan.org/blog/2007/07/17/use-inotifypropertychanged-with-bindinglist/comment-page-1/#comment-906 Kurtis Lininger Wed, 27 Jun 2012 17:24:26 +0000 http://www.gavaghan.org/blog/2007/07/17/use-inotifypropertychanged-with-bindinglist/#comment-906 Mike, Thanks for the code! The only change I did was wrap your "// make sure the property name really exists" code with "#if DEBUG / #endif" to save some time after things have proven to work. Mike,

Thanks for the code! The only change I did was wrap your “// make sure the property name really exists” code with “#if DEBUG / #endif” to save some time after things have proven to work.

]]> Comment on Understanding SSL – Part 1: Certificates and Keys by Alex http://www.gavaghan.org/blog/2009/10/14/understanding-ssl-%e2%80%93-part-1-certificates-and-keys/comment-page-1/#comment-900 Alex Thu, 07 Jun 2012 14:19:00 +0000 http://www.gavaghan.org/blog/2009/10/14/understanding-ssl-%e2%80%93-part-1-certificates-and-keys/#comment-900 Congratulations, this blog is very useful. Thanks a lot. Congratulations, this blog is very useful. Thanks a lot.

]]> Comment on Earth to Wells Fargo: Stop Being Stupid About Phishing! by quoted http://www.gavaghan.org/blog/2007/08/09/earth-to-wells-fargo-stop-being-stupid-about-phishing/comment-page-1/#comment-899 quoted Sun, 03 Jun 2012 19:33:04 +0000 http://www.gavaghan.org/blog/2007/08/09/earth-to-wells-fargo-stop-being-stupid-about-phishing/#comment-899 <strong>quoted...</strong> [...]Earth to Wells Fargo: Stop Being Stupid About Phishing! « Talk Nerdy To Me – Java, C#, .Net « Blog Archive[...]... quoted…

[...]Earth to Wells Fargo: Stop Being Stupid About Phishing! « Talk Nerdy To Me – Java, C#, .Net « Blog Archive[...]…

]]> Comment on Use INotifyPropertyChanged with BindingList by VB.Net, C#, C++ http://www.gavaghan.org/blog/2007/07/17/use-inotifypropertychanged-with-bindinglist/comment-page-1/#comment-897 VB.Net, C#, C++ Sun, 29 Apr 2012 23:52:58 +0000 http://www.gavaghan.org/blog/2007/07/17/use-inotifypropertychanged-with-bindinglist/#comment-897 <strong>VB.Net, C#, C++...</strong> [...]Use INotifyPropertyChanged with BindingList « Talk Nerdy To Me – Java, C#, .Net « Blog Archive[...]... VB.Net, C#, C++…

[...]Use INotifyPropertyChanged with BindingList « Talk Nerdy To Me – Java, C#, .Net « Blog Archive[...]…

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