silverlight - MVVM Light消息类型: When to use each type?

Question

我刚刚开始使用MVVM Light framework学习Silverlight。最近，我开始接触MVVM Light中的Messenger功能。

到目前为止，我已经下载并挖掘了Laurent发表的Clean Shutdown example，并且对Messenger类的工作原理有基本的了解，但是我仍然不确定何时使用哪种Message类型。

在网站上，以下是消息类型:

• MessageBase: A simple message class, carrying optional information about the message's sender.
• GenericMessage: A simple message with a Content property of type T.
• NotificationMessage: Used to send a notification (as a string) to a recipient. For example, save your notifications as constant in a Notifications class, and then send Notifications.Save to a recipient.
• NotificationMessage: Same as above, but with a generic Content property. Can be used to pass a parameter to the recipient together with the notification.
• NotificationMessageAction: Sends a notification to a recipient and allows the recipient to call the sender back.
• NotificationMessageAction: Sends a notification to a recipient and allows the recipient to call the sender back with a generic parameter.
• DialogMessage: Used to request that a recipient (typically a View) displays a dialog, and passes the result back to the caller (using a callback). The recipient can choose how to display the dialog, either with a standard MessageBox, with a custom popup, etc…
• PropertyChangedMessage: Used to broadcast that a property changed in the sender. Fulfills the same purpose than the PropertyChanged event, but in a less tight way.

我的问题是这样的:任何人都可以向我解释一下什么时候我通常会使用每种消息类型，或者将我指向一篇介绍每种消息类型的利弊的文章？

Answer 1

如果您不尝试使编码适合消息，而是使消息做您想要的事情，那么您将为自己省去很多麻烦和烦恼。不要害怕对消息进行子类化，以使它们执行您真正想要的消息。那是我在使用mvvm-light时遇到的第一个错误。

我的大多数邮件都使用GenericMessage，而Generic是我要传输的内容...

例如我有一个ExceptionMessage类，

Public ExceptionMessage:GenericMessage<System.Exception>

然后我用适当的值覆盖3个构造函数。

我发现，用这种方法比用鞋拔子做起来要容易得多。

我有一个深入的示例 here

它来自另一个有关消息传递的问题，我可以在其中访问我的代码...