Question

I am creating a special search text box. Among other things it have these two events:

    [Category('Behavior')]     public event EventHandler<GenericEventArgs<string>> Search;      [Category('Property Changed')]     public event EventHandler<EventArgs> ActiveColorChanged;      [Category('Property Changed')]     public event EventHandler<EventArgs> InactiveColorChanged; 

Thing is that only the bottom two shows up in the design view property event explorer thingy (whatever it’s name is…). And I am wondering why. Is it because I am not using the standard EventArgs? That shouldn’t be the case though, cause I mean, there are other events not using that… like the key press related events, etc…

The GenericEventArgs<T> class looks like this:

public class GenericEventArgs<T> : EventArgs {     public T Value { get; private set; }     public GenericEventArgs() : this(default(T)) { }     public GenericEventArgs(T value) { Value = value; } } 

What am I doing wrong here?

Answer 1

I suspect that the Property Grid does not support your double-generic EventHandler class. Try this:

public delegate void GenericHandler<T>(object sender, GenericEventArgs<T> e); 

If that doesn’t work, try a completely non-generic handler, if only to see if that’s where the problem is.

If this is the problem, then I suggest you create a bug report about it on Connect, then post the URL to the bug here so we can vote on it.