Skip to main content

Cum sa facem handling la evenimente dontr-o pagina HTML afisare printr-un controler Silverlight

Pentru a putea face acest lucru avem nevoie de un mecanism prin care sa trasmitem evenimentul produs. O solutie este javascript.
In Silverlight avem doua controlare care se ocupa cu acest lucru WebBrower si HtmlBrush. Din pacare doar WebBrower stie sa faca handling la evenimente de java script. Prin intermediul acestora codul C# poate sa apele metode javascrip din interiorul paginii pe care o afisam sau sa se inregistreze la anumite evenimente(metode).
Pentru a putea face acest lucru este nevoie sa adaugam in fisierul xaml controlerul care ne permite sa afisam continut HTML:
<WebBrowser  x:Name="browserControl" />

Pasul urmator este sa ne inregistram la notificarea dorita. Aceasta notificare reprezinta un apel a unei metode din javascript.
 browserControl.ScriptNotify += new EventHandler<NotifyEventArgs>(BrowserControl_ScriptNotify);
...
void browserControl_ScriptNotify(object sender, NotifyEventArgs e)
{
...
}
In acest moment toate mesajele de notificare o sa fie prinse si procesate de catre metoda BrowserControl_ScriptNotify. In aceasta metoda parametrul e.Value reprezenta numele la notificarea pe care noi am primito.
In codul HTML pe care noi il afisam in controller, trebuie sa apelam metoda window.external.notify("nume_notificare").
Aceasta metoda se poate apela oriunde in codul javascript sau se poate atasa la tag-uri prin evenimentul onclick de exemplu.

Comments

Popular posts from this blog

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 …

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&#…

Fundamental Books of a Software Engineer (version 2018)

More then six years ago I wrote a blog post about fundamental books that any software engineer (developer) should read. Now it is an excellent time to update this list with new entries.

There are 5 different categories of books, that represent the recommended path. For example, you start with Coding books, after that, you read books about Programming, Design and so on.
There are some books about C++ that I recommend not because you shall know C++, only because the concepts that you can learn from it.

Coding

Writing solid codeCode completeProgramming Pearls, more programming pearls(recommended)[NEW] Introduction to Algorithms

Programming

Refactoring (M. Fowler)Pragmatic ProgrammerClean code[NEW] Software Engineering: A Practitioner's Approach[NEW] The Mythical Man-Month[NEW] The Art of Computer Programming

Design

Applying UML and Patterns (GRASP patterns)C++ coding standards (Sutter, Alexandrescu)The C++ programming language (Stroustrup, Part IV)Object-oriented programming (Peter Coad)P…