Xamarin.Forms MessagingCenter Simple example
Example
Here we will see a simple example of using the MessagingCenter in Xamarin.Forms.
First, let's have a look at subscribing to a message.
In the FooMessaging model we subscribe to a message coming from the MainPage. The message should be "Hi" and when we receive it, we register a handler which sets the property Greeting. Lastly this means the current FooMessaging instance is registering for this message.
public class FooMessaging
{
public string Greeting { get; set; }
public FooMessaging()
{
MessagingCenter.Subscribe<MainPage> (this, "Hi", (sender) => {
this.Greeting = "Hi there!";
});
}
}
To send a message triggering this functionality, we need to have a page called MainPage, and implement code like underneath.
public class MainPage : Page
{
private void OnButtonClick(object sender, EventArgs args)
{
MessagingCenter.Send<MainPage> (this, "Hi");
}
}
In our MainPage we have a button with a handler that sends a message. this should be an instance of MainPage.
