MessagingCenter Class

Definition

Namespace:

Xamarin.Forms

Assembly:

Xamarin.Forms.Core.dll

Associates a callback on subscribers with a specific message name.

public class MessagingCenter : Xamarin.Forms.IMessagingCenter

type MessagingCenter = class
    interface IMessagingCenter

Inheritance

System.Object

MessagingCenter

Implements

IMessagingCenter

Remarks

The following shows a simple example of a strongly-typed callback using MessagingCenter is:

public class SubscriberThing 
{
	public int IntProperty { get; set; }
}

var subscriber = new SubscriberThing();
MessagingCenter.Subscribe<MyPage, int> (subscriber, "IntPropertyMessage", (s, e) => {
	subscriber.IntProperty = e; 
});

//...later...

MessagingCenter.Send<MyPage, int>(this, "IntPropertyMessage", 2);
Assert.AreEqual(2, subscriber.IntProperty);

Constructors

MessagingCenter()

Creates a new MessagingCenter with default values.

Properties

Instance

Gets the singleton instance of the MessagingCenter.

Methods

Send<TSender,TArgs>(TSender, String, TArgs)	Sends a named message with the specified arguments.
Send<TSender>(TSender, String)	Sends a named message that has no arguments.
Subscribe<TSender,TArgs>(Object, String, Action<TSender,TArgs>, TSender)	Run the callback on subscriber in response to parameterized messages that are named message and that are created by source.
Subscribe<TSender>(Object, String, Action<TSender>, TSender)	Run the callback on subscriber in response to messages that are named message and that are created by source.
Unsubscribe<TSender,TArgs>(Object, String)	Unsubscribes from the specified parameterless subscriber messages.
Unsubscribe<TSender>(Object, String)	Unsubscribes a subscriber from the specified messages that come from the specified sender.

Explicit Interface Implementations

IMessagingCenter.Send<TSender,TArgs>(TSender, String, TArgs)	Sends a message and arguments to objects that are listening for them on the type that is specified by TSender.
IMessagingCenter.Send<TSender>(TSender, String)	Sends the named parameterless message to objects that are listening for it on the type that is specified by TSender.
IMessagingCenter.Subscribe<TSender,TArgs>(Object, String, Action<TSender,TArgs>, TSender)	Subscribes to the specified message from the specified source.
IMessagingCenter.Subscribe<TSender>(Object, String, Action<TSender>, TSender)	Subscribes to the specified message from the specified source.
IMessagingCenter.Unsubscribe<TSender,TArgs>(Object, String)	Unsubscribes the specified subscriber from the specified message.
IMessagingCenter.Unsubscribe<TSender>(Object, String)	Unsubscribes the specified subscriber from the specified message.