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Re: .NET/LINK USER GUIDE Comment: Calling

  • To: mathgroup at smc.vnet.net
  • Subject: [mg105304] Re: .NET/LINK USER GUIDE Comment: Calling
  • From: fd <fdimer at gmail.com>
  • Date: Fri, 27 Nov 2009 06:28:27 -0500 (EST)
  • References: <he893j$q5j$1@smc.vnet.net> <hekunb$99q$1@smc.vnet.net>

On Nov 26, 3:03 pm, Todd Gayley <tgay... at wolfram.com> wrote:
> Reagrs,
>
> Your solution is exactly correct, and you can give yourself some
> well-deserved congratulations for figuring it out. You can do
> arbitrarily complicated machinations with generics in .NET/Link
> already, but .NET/Link really needs some added syntax for making
> generics easier to use, as well as more documentation.
>
> One complication for your NETCallGenericStaticMethod function is that
> the GetMethod call fails if the static method has overloads. You can
> work around this by calling GetMethods[] and then iterating through
> the list to find the one you want. I give an example of this, as well
> as some more generics-related techniques, in a notebook I wrote a
> little while ago called "Using LINQ from Mathematica." It is of
> interest to anyone working with generics in .NET/Link, not
> necessarily using LINQ. I have sent this to you separately, and I'd
> be happy to send it to anyone else who is interested. Its content is
> being incorporated into the .NET/Link documentation for future
> versions of Mathematica.
>
> Todd Gayley
> Wolfram Research
>
> At 04:47 AM 11/24/2009, wollmich wrote:
>
> >On 21 Nov., 09:41, wollmich <wollm... at gmail.com> wrote:
> > > Hi,
>
> > > I've a problem to call a static generic C# method from Mathematica and
> > > I don't find any example on the web or in your user guide.http://www.wolfram.com/learningcenter/tutorialcollection/NETLinkUserG...
>
> > > Calling a non static class (this works):
> > > Type1 = LoadNETType["DummyLib.Class1"];
> > > Object1 = NETNew[Type1];
> > > Object1@Method1[];
>
> > > Calling a static method in a static class (this works):
> > > Type2 = LoadNETType["DummyLib.Class2"];
> > > Class2`Method2[];
>
> > > Calling a non static but generic class  (this works):
> > > Type3 = LoadNETType["DummyLib.Class3`1[[DummyLib.Class1]]"];
> > > Object3 = NETNew[Type3];
> > > Object3@Method3[];
>
> > > Calling a static generic method in a static class (THIS DOESN'T
> > > WORK!!!!) I've no idea how to call it???
> > > The method could look like that in C#:
> > > C#-Code:
> > > namespace DummyLib
> > > {
> > >     public static class Class4
> > >     {
> > >         public static T Method4<T>()
> > >             where T : new()
> > >         {
> > >             return new T();
> > >         }
> > >     }
>
> > > }
>
> > > With NETTypeInfo the method is listet, but I don't no idea how to pass
> > > the type parameter?
> > > Type4 = LoadNETType["DummyLib.Class4"];
> > > NETTypeInfo[Type4];
>
> > > Can somebody please help me. Thanks.
>
> > > Regards Wollmich
>
> >I've a solution which works:
>
> >NETCallGenericStaticMethod[classtype_ method_, type_, arguments___] :=
> >    Module[{m1, m2, t1, t2},
> >    t1 = GetTypeObject[classtype];
> >    m1 = t1@GetMethod[method];
> >    t2 = GetTypeObject[type];
> >    m2 = m1@MakeGenericMethod[{t2}];
> >    Return[m2@Invoke[Null, arguments]]];
>
> >Any other idea?
>
> >Reagrs Wollmich

First, Congrats to wollmich, I tried to tackle this problem but I gave
up, well done!!

I use NET/Link quite a lot to help testing our applications and I
would be interested in obtaining the document todd has mentioned, if
possible, can I have a copy?

Best
Felipe





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