¿Qué es INotifyPropertyChanged xamarin?

What is INotifyPropertyChanged xamarin?

ViewModels generally implement the INotifyPropertyChanged interface, which means that the class fires a PropertyChanged event whenever one of its properties changes. The data binding mechanism in Xamarin.

INotifyPropertyChanged interface is used to notify the view or ViewModel that it does not matter which property is binding; it is updated. Let’s take an example for understanding this interface. Take one WPF Window in which there are a total of three fields: First Name, Last Name and Full Name.

Create your app

1. Open Visual Studio 2019.
2. Select Create a new project.
3. Select Mobile from the Project type drop-down.
4. Select the Mobile App (Xamarin. Forms) template and select Next.
5. Enter AwesomeApp as the project name and select Create.
6. Select the Blank template. Ensure Android and iOS are both selected and select OK.

The INotifyPropertyChanged interface is central to using data binding in WPF. You typically create ViewModels containing properties that fire a PropertyChanged event whenever a property value changes. Implementing this plumbing over and over for every property can become tedious.

The INotifyPropertyChanged interface, while easy to implement, is hard to consume. Registering for notification events requires extra bookkeeping code that obfuscates business logic. Update Controls is an open source library that replaces event-based data binding with automatic discovery and updating.

The core reason I decided on INotifyPropertyChanged was that you can’t use DependencyObjects in non-UI Disptacher threads. Which is a deal breaker. Enough with your jibber jabber, show me the code! So here’s the basic implementation of INotifyPropertyChanged for the FirstName property:     publicclassCow: INotifyPropertyChanged

So here’s the basic implementation of INotifyPropertyChanged for the FirstName property:     publicclassCow: INotifyPropertyChanged         privatestring_firstName;         publicstringFirstName             get{ return_firstName; }             set                 _firstName = value;