Maybe, at this time, parameter is null ?
Win4ster
2010-02-22 00:21:49
+2
A:
It seems that the RelayCommand will cast the value the parameter to the generic T.
But you cannot cast a null to a struct, as the exception tells you!
If you initialize the RelayCommand with a nullable struct, it will work as expected!
RelayCommand<int?> or RelayCommand<Nullable<int>>
HTH
Arcturus
2010-02-23 16:34:44
Uhm, that should be the reason... But it is a little weird.. I didn't see any code using nullable ...
Jesus Rodriguez
2010-02-23 19:52:14
Yes that is correct.. a `double` or `int` are value types, and cannot be null. If you make them nullable types, it should work. Casting `null` to a struct will produce an exception! See Vlads comment with the method where you can see the cast to T!
Arcturus
2010-02-24 09:09:06
try compiling double test = (double)null;.. in the generic world you will get a runtime exception! ;)
Arcturus
2010-02-24 09:24:13