No - what I was trying to do was avoid having 450 events and 450 overrides in the 150 generated classes - however the compiler couldn't do it. That project compiled ok, but any project referencing it trying to handle the events from the generic class created a compiler error suggesting I simplify the code to handle the event - not exactly sure what can be simplified there - it's basically Class.Event += new EventHandler(target);
Dino -----Original Message----- From: Discussion of advanced .NET topics. [mailto:[EMAIL PROTECTED] On Behalf Of Peter Ritchie Sent: Tuesday, 21 February 2006 12:58 To: [email protected] Subject: Re: [ADVANCED-DOTNET] Statics on Generic classes Okay, great. I got the impression you wanted something per invocation not per type. On Tue, 21 Feb 2006 11:44:32 +1300, Dean Cleaver <[EMAIL PROTECTED]> wrote: >Yes - that would be perfectly fine. Every class of mine will be a >different <T>, so classes 1 and 3 *SHOULD* never occur - especially >given they are code generated. > >I have however just tried it with about 150 classes and events on the >generic class - got a c# compiler error trying to reference the events. >If I removed the events, the solution would compile, but not with the >events - and they were half of the reason for changing to generics. So >I've had to switch back to not using generics till I have time to >resolve it - the bug report to MS was going to take 314 minutes which I >didn't have time for. > >I might modify the code generator again tonight, see if I can get the >same compiler error, and then just leave it overnight to file the >report. > >Dino > >-----Original Message----- >From: Discussion of advanced .NET topics. >[mailto:[EMAIL PROTECTED] On Behalf Of Peter Ritchie >Sent: Tuesday, 21 February 2006 03:01 >To: [email protected] >Subject: Re: [ADVANCED-DOTNET] Statics on Generic classes > >Are you OK with the following:? >class GenericBase<T> >{ > public static int x; >} > >class GenericClass1 : GenericBase<int> >{ >} > >class GenericClass2 : GenericBase<decimal> { } > >class GenericClass3: GenericBase<int> >{ >} >//... >GenericClass1.x = 5; >GenericClass2.x = 10; >GenericClass3.x = 15; > >String text; >text.Format("{0} {1} {2}", new object[] {GenericClass1.x, >GenericClass2.x, GenericClass3.x}); Debug.WriteLine(text); > >//eof > >...which would output "15 10 15" not "5 10 15"? > >On Mon, 20 Feb 2006 17:30:04 +1300, Dean Cleaver ><[EMAIL PROTECTED]> wrote: > >>Peter, >> >>Actually, now that you mention it I will see what I want. Basically, >>in > >>almost every class I have I have 2 static datasets containing a list >>of > >>all of the items in the database for that class - especially the likes >>of a "Country" table where countries are not added regularly if ever, >>I > >>keep an in-memory copy of them for quick population of a combo box for >>example. Saves on round-tripping to the db when on a VPN from a remote >>office. >> >>So what I would be doing is GenericBase<x> and then GenericBase<y> etc >>where every class will have a different generic type, which from what >>you are saying will in fact give me my desired results, and a quick >>test has proven that: >> >> >>class GenericBase<T> >>{ >> public static int x; >>} >> >>class GenericClass1 : GenericBase<int> { } >> >>class GenericClass2 : GenericBase<decimal> { } >> >>And then ran this: >> >>GenericClass1.x = 5; >>GenericClass2.x = 10; >>MessageBox.Show(GenericClass1.x.ToString()); >> >>Returns 5 - meaning that I can define a Generic Base with static >>members, and then define 150 classes from that each based on a >>different type, and I will in effect have 150 individual sets of >>static > >>members, not 1 static member like I would have had with a normal >>non-generic base class. I just made the mistake of creating 2 classes >>of GenericBase<int>, which will share the static members. >> >>Much appreciated - I'd been looking at the code trying all sorts, but >>never thought to change the type. >> >>Cheers, >>Dino >> >>-----Original Message----- >>From: Discussion of advanced .NET topics. >>[mailto:[EMAIL PROTECTED] On Behalf Of Peter >>Ritchie >>Sent: Monday, 20 February 2006 16:54 >>To: [email protected] >>Subject: Re: [ADVANCED-DOTNET] Statics on Generic classes >> >>Statics in generics don't operate any differently than non-generic >>classes. They're basically globals that are scoped within a class. >> >>Generics are also not like unmanaged C++ templates; their body is not >>copied (inlined) for each use. >> >>In your example, x is a member of GenericBase<int>. If you changed >>your declaration of GenericClass2 to derive from GenericBase<Decimal> >>(or any other type except int) then you'd see the results you >>expected, > >>but not what you want. >> >>If you're expecting a class declaration deriving from a generic to >>operate like an instance (i.e. each class declaration have its own >>copy > >>of derived >>statics) then you're out of luck. >> >>What were you hoping to accomplish? In case there's another way of >>doing what you want. >> >>On Mon, 20 Feb 2006 15:43:36 +1300, Dean Cleaver >><[EMAIL PROTECTED]> wrote: >> >>>I just tried a test like this: >>> >>>class GenericBase<T> >>>{ >>> public static int x; >>>} >>> >>>class GenericClass1 : GenericBase<int> { } >>> >>>class GenericClass2 : GenericBase<int> { } >>> >>>And then ran this: >>> >>>GenericClass1.x = 5; >>>GenericClass2.x = 10; >>>MessageBox.Show(GenericClass1.x.ToString()); >>> >>>To my disappointment, it displayed 10 not 5 as I had hoped - >>>basically > >>>means that any statics on a Generic base are common to all >>>derivations > >>>of that Generic class, not to each derived class - or is there >>>another > >>>way to effect what I am trying to do? =================================== This list is hosted by DevelopMentor(r) http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentor® http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
