如何在 C# 中通过 MessagingCenter 发送对象列表？

Question

我正在尝试通过 MessagingCenter 将 BarData 个对象列表发送到我的 FavoritesPage.xaml.cs。我试过了

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

它给了我一个错误，告诉我无法将发件人从列表转换为对象。然后我尝试使用

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

和 visual studio 对着我尖叫，哈哈！我尝试在线搜索如何通过 MessagingCenter 发送对象列表，但我找不到任何内容。有人可以帮忙吗？

Answer 1

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.

例子

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

其中MainPage是this的类型，List<BarData>是参数类型

如何在 C# 中通过 MessagingCenter 发送对象列表？

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

c#

xamarin.android

xamarin.forms

messagingcenter