How do I send a list of objects through MessagingCenter in C#?

Question

I am trying to send list of BarData objects to my FavoritesPage.xaml.cs through MessagingCenter. I have tried

MessagingCenter.Send<BarData>(_favoriteBarsList, "FaveBars");

and it gives me an error, telling me I can't convert the sender from a list to an object. I then tried to use

MessagingCenter.Send<List<BarData>>(_favoriteBarsList, "FaveBars");

and visual studio screams at me LOL! I tried search online how to send a list of objects through MessagingCenter but I can't find anything. Can someone please help?

TheGeneral · Accepted Answer · 2021-09-22 07:55:09Z

2

MessagingCenter.Send Method

Sends a named message with the specified arguments

Parameters

sender TSender

The instance that is sending the message. Typically, this is specified with the this keyword used within the sending object.

message String

The message that will be sent to objects that are listening for the message from instances of type TSender.

args TArgs

The arguments that will be passed to the listener's callback.

Example

MessagingCenter.Send<MainPage,List<BarData>>(
    this, // the context you are on 
    "FaveBars", // the named message
    _favoriteBarsList); // the argument

Where MainPage is the type of this, and List<BarData> is the argument type

answered Sep 22, 2021 at 7:55

TheGeneral

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3 Comments

Miranda Hall Over a year ago

Thank you for answering my question. Would I still put MainPage even though I don't want the list of objects to be sent to the MainPage?

TheGeneral Over a year ago

@MirandaHall Its not sending to the main page, its the page or context your are on, so replace MainPage, with where ever you are

Miranda Hall Over a year ago

How would you set up the Subscribe feature?

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