[英]How can I handle async and await when using Xamarin MessagingCenter calling an async method?
[英]Can i pass an variable TSender in a MessagingCenter?
我試圖用這個例子來做到這一點:
public void Method1(object someClassAsTSender, object parameter)
{
//i think parametertype = parameter...
MessagingCenter.Subscribe<someClassAsTSender, parametertype> (this, "messageKey", (message, args) =>
{
Device.BeginInvokeOnMainThread(async () =>
{
//await do;
});
}
);
}
或者
public void Method2(object someClassAsTSender, object parameter)
{
//i think parametertype = parameter...
MessagingCenter.Subscribe<someClassAsTSender, parametertype> (this, "messageKey", (message, args) =>
{
//do;
}
);
}
我嘗試使用 GetType().Name、typeof(),但不知道如何解決這個問題。 這只是一個疑問,因為對於 MVVM,我認為使用 Framework 更有趣。
如果這樣使用MessagingCenter不正確,請解釋。
public static void Subscribe<TSender,TArgs> (object subscriber, string message, Action<TSender,TArgs> callback, TSender source = null) where TSender : class;
TArgs
是用作消息的對象的類型 arguments 用於消息,但您不能使用typeof
或GetType
來設置它。您可以將其設置為object
,例如:
public void Method1(object someClassAsTSender, object parameter)
{
//i think parametertype = parameter...
MessagingCenter.Subscribe<someClassAsTSender, object> (this, "messageKey", (message, args) =>
{
//convert the type (e.g string data = args as string)
Device.BeginInvokeOnMainThread(async () =>
{
//await do;
});
}
);
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.