Generics class from a runtime type

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Hi guys

i have a class that build in runtime(RClass) and also have a Generic class DataLoader, how can i create a type of DataLoader<RClass> and use its methods

C#

public interface IDataLoader<GType>
{
//some code
   GType SampleMethod();
}

public class DataLoader <GType>: IDataLoader<GType>
{
  GType SampleMethod(){
    //some code
  }
}

//class "RClass" created in runtime
MyClassBuilder MCB=new MyClassBuilder("RClass");
var myclass = MCB.CreateObject(new string[3] { "id", "name", "link" }, new Type[3] { typeof(int), typeof(string), typeof(string) });
Type myclassType = myclass.GetType();

var dta = typeof(DataLoader<>).MakeGenericType(myclassType);
// ?????
var gs = (???)Activator.CreateInstance(dta);
gs.SampleMethod();

Posted 15-May-15 10:43am

eagers

Updated 16-May-15 8:34am

v5

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Comments

Sergey Alexandrovich Kryukov 15-May-15 17:13pm

What would it supposed to mean, "send a class"?
—SA

eagers 15-May-15 17:28pm

thanks for the answer, i improve the question

Sascha Lefèvre 15-May-15 22:33pm

It's exactly the same problem you already got an answer for here:
http://www.codeproject.com/Questions/991807/How-can-Create-two-nested-class-in-runtime?arn=0

Just B<T> instead of List<T> :-)

eagers 16-May-15 3:48am

thanks for the answer, i'v got that what you say, so i must have an interface for my generic class somthing like IB like IList and use that technique in http://www.codeproject.com/Questions/991807/How-can-Create-two-nested-class-in-runtime?arn=0

Maciej Los 16-May-15 7:02am

Do not repost!!![^]

eagers 16-May-15 8:34am

this two post is' not identical, on that post i want use that in a List but here i want use the runtime class in another generic class that i create it. i create an interface for my generic class. but it's not work.

public interface IDataLoader<GType>
{
//some code
}

public class DataLoader <GType>: IDataLoader<GType>
{
}

//class A created in runtime
MyClassBuilder MCB=new MyClassBuilder("A");
var myclass = MCB.CreateObject(new string[3] { "id", "name", "link" }, new Type[3] { typeof(int), typeof(string), typeof(string) });
Type myclassType = myclass.GetType();
var dta = typeof(DataLoader<>).MakeGenericType(myclassType);
//Error ?????
var gs = (IDataLoader)Activator.CreateInstance(dta);

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Matt T Heffron · Answer 1 · 2015-05-15T13:19:00

I think what you want to use would be something like:

C#

Type BTP = typeof(B).MakeGenericType(TP);
System.Reflection.ConstructorInfo ctorBTP = BTP.GetConstructor(Type.EmptyTypes);
dynamic a = ctorBTP.Invoke(null);

There's no way I can think of to have this be strongly typed at compile time as B<TP> because that type doesn't exist at compile time.