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C# Inside one event handler, how to pause execution and wait for a second event to fire?

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0

I have a DLL that return all information asynchronous to several event handler. When I press a button I call a series of functions in the DLL, but the next function should not be called until the previous function has fired the event handler.

Button_Click_Handler() 
 LCV.Load() // Returns immediately, Fires OnLoaded or OnError when done.
 // Pause execution here and wait the for OnLoaded or OnError event to fire.
 LCV.Read() // Returns immediately, Fires OnCard Or OnError when done.
 // Pause execution here and wait the for OnCard or OnError event to fire.
 LCV.Put(x) // Returns immediately, Fires OnPut Or OnError when done.
 // Pause execution here and wait the for OnPut or OnError event to fire.

Is there a way to wait for an event to fire without having to attach an event handler and use signalling? To spread out the flow through all event handler would be very messy and not easy to follow. If the code was in the event handlers themself, it has to know "what mode" it is in and execute different code snippets. As I said, extremely messy.

c# event-handling .net-4.5 event-wait-handle

share|improve this question

asked Mar 25 at 13:26

Max KiellandMax Kielland

3,49177 gold badges4242 silver badges8080 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Normally you should use a semaphore like WaitOne : docs.microsoft.com/en-us/dotnet/api/… I like the socket asynchronous Server as a good example : docs.microsoft.com/en-us/dotnet/framework/network-programming/…
  
  – jdweng
  Mar 25 at 13:39
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  "Is there a way to wait for an event to fire without having to attach an event handler and use signalling?" Not really, but here's a relatively simple solution by Adam using TaskCompletionSource.
  
  – Idle_Mind
  Mar 25 at 14:12
  

  
  
  
  

add a comment | 

0

I have a DLL that return all information asynchronous to several event handler. When I press a button I call a series of functions in the DLL, but the next function should not be called until the previous function has fired the event handler.

Button_Click_Handler() 
 LCV.Load() // Returns immediately, Fires OnLoaded or OnError when done.
 // Pause execution here and wait the for OnLoaded or OnError event to fire.
 LCV.Read() // Returns immediately, Fires OnCard Or OnError when done.
 // Pause execution here and wait the for OnCard or OnError event to fire.
 LCV.Put(x) // Returns immediately, Fires OnPut Or OnError when done.
 // Pause execution here and wait the for OnPut or OnError event to fire.

Is there a way to wait for an event to fire without having to attach an event handler and use signalling? To spread out the flow through all event handler would be very messy and not easy to follow. If the code was in the event handlers themself, it has to know "what mode" it is in and execute different code snippets. As I said, extremely messy.

c# event-handling .net-4.5 event-wait-handle

share|improve this question

asked Mar 25 at 13:26

Max KiellandMax Kielland

3,49177 gold badges4242 silver badges8080 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Normally you should use a semaphore like WaitOne : docs.microsoft.com/en-us/dotnet/api/… I like the socket asynchronous Server as a good example : docs.microsoft.com/en-us/dotnet/framework/network-programming/…
  
  – jdweng
  Mar 25 at 13:39
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  "Is there a way to wait for an event to fire without having to attach an event handler and use signalling?" Not really, but here's a relatively simple solution by Adam using TaskCompletionSource.
  
  – Idle_Mind
  Mar 25 at 14:12
  

  
  
  
  

add a comment | 

I have a DLL that return all information asynchronous to several event handler. When I press a button I call a series of functions in the DLL, but the next function should not be called until the previous function has fired the event handler.

Button_Click_Handler() 
 LCV.Load() // Returns immediately, Fires OnLoaded or OnError when done.
 // Pause execution here and wait the for OnLoaded or OnError event to fire.
 LCV.Read() // Returns immediately, Fires OnCard Or OnError when done.
 // Pause execution here and wait the for OnCard or OnError event to fire.
 LCV.Put(x) // Returns immediately, Fires OnPut Or OnError when done.
 // Pause execution here and wait the for OnPut or OnError event to fire.

Is there a way to wait for an event to fire without having to attach an event handler and use signalling? To spread out the flow through all event handler would be very messy and not easy to follow. If the code was in the event handlers themself, it has to know "what mode" it is in and execute different code snippets. As I said, extremely messy.

c# event-handling .net-4.5 event-wait-handle

share|improve this question

asked Mar 25 at 13:26

Max KiellandMax Kielland

3,49177 gold badges4242 silver badges8080 bronze badges

Button_Click_Handler() 
 LCV.Load() // Returns immediately, Fires OnLoaded or OnError when done.
 // Pause execution here and wait the for OnLoaded or OnError event to fire.
 LCV.Read() // Returns immediately, Fires OnCard Or OnError when done.
 // Pause execution here and wait the for OnCard or OnError event to fire.
 LCV.Put(x) // Returns immediately, Fires OnPut Or OnError when done.
 // Pause execution here and wait the for OnPut or OnError event to fire.

share|improve this question

asked Mar 25 at 13:26

Max KiellandMax Kielland

3,49177 gold badges4242 silver badges8080 bronze badges

share|improve this question

asked Mar 25 at 13:26

Max KiellandMax Kielland

3,49177 gold badges4242 silver badges8080 bronze badges

asked Mar 25 at 13:26

Max KiellandMax Kielland

3,49177 gold badges4242 silver badges8080 bronze badges

asked Mar 25 at 13:26

Max KiellandMax Kielland

3,49177 gold badges4242 silver badges8080 bronze badges