Recently I faced with a business requirement about extracting informations from some html pages and display them in a local application. The principal problem that I found was that the result were in html format and I needed to transform that in a c# object, in order to be able to manage the informations in... Continue Reading →
Upgrade an Angular 2 application to Angular 4
One years ago I wrote a series of posts about Angular 2 and how we can develop a base application with this new framework. The time is gone and during this period many releases came; the last Angular 4 version is 4.4.6 and a new stable version of the framework has been released in version... Continue Reading →
Attachments management with Angular 2
A common issue that we faced in our applications is implement a component to allow the management of the attachment upload. We need to insert a file input field in the page, grab the change event of the field, extract the file and send it to a service. Recently I have needed to implement this... Continue Reading →
Translations in Angular 2
A common requirement in Angular 2 is configure and share a service used from all the components of the application. In a multilanguage application, a service that we need to use is the provider for the language translations; obviously this module will be used in all the components, or at least in those that have... Continue Reading →
Feature modules in Angular 2
Angular 2 give us the chance to organize our application in modules. Briefly, a module is a library where there may be components, directives and pipes and define a block of functionalities; Angular 2 libraries itself are modules, like FormsModule, HttpModule. One cool behaviour of the modules is the ability to be loaded eagerly or lazyly through... Continue Reading →
Pipes in Angular 2
Developing an Angular 1 application, filters were very useful to accomplish different needs such as filter values from an array, apply a display format to a value and so on. In Angular 2 filters are non longer availables and the pipes take place. Instead of filters, angular pipes are more flexible because they are able to... Continue Reading →
ViewChilds in Angular2
In some cases we enable the communication between a parent and a child component by using parameters passed to the child; or the parent component can waiting an event that will be emitted from the child. But in other cases the parent need to access to methods of the child component, so we need to... Continue Reading →
Master-detail component in Angular 2
One of the new features of Angular 2 is the communication between components and how they can share informations and events. It’s very frequent that you have to implement a master/detail view, where you have a list of elements and we need to show the detail when the user click on a row. Let’s go... Continue Reading →
Mandatory fields validation with knockoutjs extenders
Knockout is a lightweight javascript library that help us to bind the UI with a model and build rich web UI interactions. The main behaviour of this library are the observable variables, that allow us to make a bidirectional binding between the html fields and the view model of the page. An interesting feature is... Continue Reading →
Data Binding in Angular 2
Angular 2 introduce a new powerful data binding syntax, that you can use in the application views. With this new features, you can specify for every element if it’s binded one way (property, function) or two way (model update). The new sintax is very clear and once you understand is very easy to use it... Continue Reading →
Mirko Maggioni 