C#得到给定T的Generic <T>类型

Question

我在C#中有一个泛型类,如下所示:

   public class GenericClass<T> { ... }

现在,我有Type一个目标对象,并希望,通过反射或其他方式获得Type的对象GenericClass<T>,其中T对应于该类型的对象我有我的目标.

像这样:

   Type requiredT = myobject.GetType();
   Type wantedType = typeof(GenericClass<requiredT>);

显然这种语法不起作用,但我该怎么办呢？

Answer 1

是的你可以:

Type requiredT = ...
Type genericType = typeof(GenericClass<>);
Type wantedType = genericType.MakeGenericType(requiredT);

这将为您提供GenericClass<T>Type对象,其中T对应于您的requiredT.

然后,您可以使用Activator如下构造实例:

var instance = Activator.CreateInstance(wantedType, new Object[] { ...params });

Answer 2

Type requiredT = myobject.GetType();
Type genericType = typeof(GenericClass<>);
Type wantedType = genericType.MakeGenericType(requiredT);

Answer 3

Type wantedType = typeof(GenericClass<>).MakeGenericType(requiredT);