I have a class (settings, etc.) which is derived from CollectionBase and
contains a number of fields and a few events. When I create an instance of
this class in my app, and serialize it, it works. If I add an event handler
in my app (for one of the events in my settings class), I get an exception
that my app class is not marked as Serializable. If I mark the app class as
Serializible, I get an exception that Type System.Windows. Forms.Form in
Assembly System.Windows. Form is not marked as Serializable. I am not
interested is serializing any data relating to the event, but it does not
seem possible to mark events/delegates as NonSerialized. Are events
serialized? How do I avoid this problem? 3 16333
Hello
Prefix the NonSerializedAt tribute with "field:", this will make the C#
compiler mark the underlying delegate field and not the event itself as
NonSerialized.
[field:NonSerial ized] public event MyEventHandler MyEvent;
Another workaround is using custom events (although I think the first
solution is simpler)
[NonSerialized]
private MyEventHandler _myEvent;
public event MyEventHandler MyEvent
{
add { _myEvent += value; } // Not Thread-safe
remove { _myEvent -= value; } // Not Thread-safe
}
Or use the thread safe version if your event can be accessed from multiple
threads
[NonSerialized]
private MyEventHandler _myEvent;
public event MyEventHandler MyEvent
{
add { lock(this) {_myEvent += value; } }
remove { lock(this) {_myEvent -= value; } }
}
Best regards,
Sherif
"mikeb" <mi***@discussi ons.microsoft.c om> wrote in message
news:A7******** *************** ***********@mic rosoft.com... I have a class (settings, etc.) which is derived from CollectionBase and contains a number of fields and a few events. When I create an instance of this class in my app, and serialize it, it works. If I add an event handler in my app (for one of the events in my settings class), I get an exception that my app class is not marked as Serializable. If I mark the app class as Serializible, I get an exception that Type System.Windows. Forms.Form in Assembly System.Windows. Form is not marked as Serializable. I am not interested is serializing any data relating to the event, but it does not seem possible to mark events/delegates as NonSerialized. Are events serialized? How do I avoid this problem?
<"Sherif El-Metainy" <elmeteny REMOVETHIS at thewayout NOSPAM dot
net>> wrote: Prefix the NonSerializedAt tribute with "field:", this will make the C# compiler mark the underlying delegate field and not the event itself as NonSerialized.
[field:NonSerial ized] public event MyEventHandler MyEvent;
Another workaround is using custom events (although I think the first solution is simpler)
[NonSerialized] private MyEventHandler _myEvent; public event MyEventHandler MyEvent { add { _myEvent += value; } // Not Thread-safe remove { _myEvent -= value; } // Not Thread-safe }
Or use the thread safe version if your event can be accessed from multiple threads
[NonSerialized] private MyEventHandler _myEvent; public event MyEventHandler MyEvent { add { lock(this) {_myEvent += value; } } remove { lock(this) {_myEvent -= value; } } }
One suggestion for the thread-safe version - rather than locking on
"this" (which is almost always a bad idea) lock on a privately owned
object.
See http://www.pobox.com/~skeet/csharp/t...ckchoice.shtml
--
Jon Skeet - <sk***@pobox.co m> http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
Thanks for the help. I used the field prefix for now and everything works fine.
Mike B
"Sherif El-Metainy" wrote: Hello
Prefix the NonSerializedAt tribute with "field:", this will make the C# compiler mark the underlying delegate field and not the event itself as NonSerialized.
[field:NonSerial ized] public event MyEventHandler MyEvent;
Another workaround is using custom events (although I think the first solution is simpler)
[NonSerialized] private MyEventHandler _myEvent; public event MyEventHandler MyEvent { add { _myEvent += value; } // Not Thread-safe remove { _myEvent -= value; } // Not Thread-safe }
Or use the thread safe version if your event can be accessed from multiple threads
[NonSerialized] private MyEventHandler _myEvent; public event MyEventHandler MyEvent { add { lock(this) {_myEvent += value; } } remove { lock(this) {_myEvent -= value; } } }
Best regards, Sherif
"mikeb" <mi***@discussi ons.microsoft.c om> wrote in message news:A7******** *************** ***********@mic rosoft.com...I have a class (settings, etc.) which is derived from CollectionBase and contains a number of fields and a few events. When I create an instance of this class in my app, and serialize it, it works. If I add an event handler in my app (for one of the events in my settings class), I get an exception that my app class is not marked as Serializable. If I mark the app class as Serializible, I get an exception that Type System.Windows. Forms.Form in Assembly System.Windows. Form is not marked as Serializable. I am not interested is serializing any data relating to the event, but it does not seem possible to mark events/delegates as NonSerialized. Are events serialized? How do I avoid this problem? This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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