dynamic generic creation using Type.GetType(string)?

[jon]

I'm trying to write a block of code that can create an instance of a
generic object, with the Type coming in as a dynamic string. It isn't
working yet. Any advice how I can dynamically create the appropriate
object to pass into the generic's constructing <T,U>?


-------------------------------
// fully qualified types as string
string type1Str = "ns1.ns2.contro l1, software.lib1";
string type2Str = "ns1.ns2.contro l2, software.lib1";

// create type objects
Type type1Type = Type.GetType(ty pe1Str);
Type type2Type = Type.GetType(ty pe2Str);

// try to create generic object passing in dynamic types
// this next line doesn't compile because of "type1Type" not being
appropriate here
GenericObj<type 1Type, type2Typegeneri cObj = new
GenericObj<type 1Type, type2Type>();

public class GenericObj<T,U{
......
}

[Marc Gravell]

Re: dynamic generic creation using Type.GetType(st ring)?

Something like:

Type final = typeof(GenericO bj<,>).MakeGene ricType(type1Ty pe,
type2Type);
object obj = Activator.Creat eInstance(final );

Marc

[Jon Skeet [C# MVP]]

Re: dynamic generic creation using Type.GetType(st ring)?

jon <jon.sajdak@gma il.comwrote:

I'm trying to write a block of code that can create an instance of a
generic object, with the Type coming in as a dynamic string. It isn't
working yet. Any advice how I can dynamically create the appropriate
object to pass into the generic's constructing <T,U>?

You have to use reflection:

Type open = typeof(GenericO bj<,>);
Type constructed = open.MakeGeneri c(new Type[]{type1Type, type2Type});
object instance = Activator.Creat eInstance(const ructed);
....

--
Jon Skeet - <skeet@pobox.co m>
Web site: http://www.pobox.com/~skeet
Blog: http://www.msmvps.com/jon.skeet
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