Skip to main content

How to get a valid daylight saving time

Foarte multi dezvoltatori s-au lovit de problema legate de datetime si offsetul timpului in functie de locatie.
Daca avem o data si vrem sa verificam daca pentru aceasta data daylight saving este activ sau nu putem sa verificam folosind metoda IsDaylighSavingTime.
TimeZoneInfo.Local.IsDaylightSavingTime(DateTime.Parse("01/04/2012"))
Aceasta metoda o sa ne returneze TRUE daca daylight saving este activ pentru data respectiva. Trebuei avut grija ca in functie de locatia de pe glob dayling saving poate sa inceapa sau sa se termine intr-o zi diferita.
Odata ce ne-am setat current culture pe cultura dorita am avea si daylight saving time setat pentru zona respectiva.
Thread.CurrentThread.CurrentCulture = myCulture;
Thread.CurrentThread.CurrentUICulture = myCulture;
TimeZoneInfo.Local.IsDaylightSavingTime(DateTime.Parse("01/04/2012"))
Dar o sa avem o surpriza neplacuta. TimeZoneInfo.Local o sa ne returneze timezone-ul local a masinii si nu cel pe care noi l-am setat prin intermediul culture-ului.
De ce se intampla acest lucru? Este destul de simplu, o cultura nu are o singur time-zone. Poate sa aibe 2,3 chiar si mai multe time-zone-uri.
Pentru a putea face verificarea este nevoie sa stim exact cu ce time-zone lucram si sa il setam explicit. O lista cu toate time-zone-urile se poate obtine prin metoda TimeZoneInfo.GetSystemTimeZones().

Comments

Popular posts from this blog

How to check in AngularJS if a service was register or not

There are cases when you need to check in a service or a controller was register in AngularJS.
For example a valid use case is when you have the same implementation running on multiple application. In this case, you may want to intercept the HTTP provider and add a custom step there. This step don’t needs to run on all the application, only in the one where the service exist and register.
A solution for this case would be to have a flag in the configuration that specify this. In the core you would have an IF that would check the value of this flag.
Another solution is to check if a specific service was register in AngularJS or not. If the service was register that you would execute your own logic.
To check if a service was register or not in AngularJS container you need to call the ‘has’ method of ‘inhector’. It will return TRUE if the service was register.
if ($injector.has('httpInterceptorService')) { $httpProvider.interceptors.push('httpInterceptorService&#…

ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded

Today blog post will be started with the following error when running DB tests on the CI machine:
threw exception: System.InvalidOperationException: The Entity Framework provider type 'System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer' registered in the application config file for the ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded. Make sure that the assembly-qualified name is used and that the assembly is available to the running application. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information. at System.Data.Entity.Infrastructure.DependencyResolution.ProviderServicesFactory.GetInstance(String providerTypeName, String providerInvariantName) This error happened only on the Continuous Integration machine. On the devs machines, everything has fine. The classic problem – on my machine it’s working. The CI has the following configuration:

TeamCity.NET 4.51EF 6.0.2VS2013
It seems that there …

Run native .NET application in Docker (.NET Framework 4.6.2)

Scope
The main scope of this post is to see how we can run a legacy application written in .NET Framework in Docker.

Context
First of all, let’s define what is a legacy application in our context. By a legacy application we understand an application that runs .NET Framework 3.5 or higher in a production environment where we don’t have any more the people or documentation that would help us to understand what is happening behind the scene.
In this scenarios, you might want to migrate the current solution from a standard environment to Docker. There are many advantages for such a migration, like:

Continuous DeploymentTestingIsolationSecurity at container levelVersioning ControlEnvironment Standardization
Until now, we didn’t had the possibility to run a .NET application in Docker. With .NET Core, there was support for .NET Core in Docker, but migration from a full .NET framework to .NET Core can be costly and even impossible. Not only because of lack of features, but also because once you…