如何檢查一個事件是否已經觸發C＃

Question

嘿傢伙我在執行我的代碼時遇到了麻煩。我目前使用PushSharp庫，我想要做的事情之一是如果事件觸發，我想返回一個真或假的值，取決於它是什麼事件。繼承人的代碼：

public static bool SenddNotification() 
{ 
var push = new PushBroker(); 

     //Wire up the events for all the services that the broker registers 
     push.OnNotificationSent += NotificationSent; 
     push.OnDeviceSubscriptionChanged += DeviceSubscriptionChanged; 

} 


static bool DeviceSubscriptionChanged(object sender, string oldSubscriptionId, string newSubscriptionId, INotification notification) 
    { 
     //Currently this event will only ever happen for Android GCM 
     Console.WriteLine("Device Registration Changed: Old-> " + oldSubscriptionId + " New-> " + newSubscriptionId + " -> " + notification); 
     return false; 
    } 

    static bool NotificationSent(object sender, INotification notification) 
    { 
     Console.WriteLine("Sent: " + sender + " -> " + notification); 
     return true; 
    } 

那麼想我如果是事件觸發，返回true或false取決於發生了什麼，然後最終在第一種方法返回該值

Answer 1

你可以設置一個全局布爾變量，並讓你的事件設置該變量，然後讓你的第一個方法返回它。事情是這樣的：

private bool globalBool; 

public static bool SenddNotification() 
{ 
var push = new PushBroker(); 

     //Wire up the events for all the services that the broker registers 
     push.OnNotificationSent += NotificationSent; 
     push.OnDeviceSubscriptionChanged += DeviceSubscriptionChanged; 

     return globalBool; 
} 


static bool DeviceSubscriptionChanged(object sender, string oldSubscriptionId, string newSubscriptionId, INotification notification) 
    { 
     //Currently this event will only ever happen for Android GCM 
     Console.WriteLine("Device Registration Changed: Old-> " + oldSubscriptionId + " New-> " + newSubscriptionId + " -> " + notification); 
     globalBool = false; 
    } 

    static bool NotificationSent(object sender, INotification notification) 
    { 
     Console.WriteLine("Sent: " + sender + " -> " + notification); 
     globalBool = true; 
    } 

當然，你必須返回之前檢查它null，並適當地處理它。