调用泛型类的方法

Question

这是上下文:

我尝试编写一个映射器,用于动态地将我的DomainModel对象转换为ViewModel Ojects.我得到的问题是,当我尝试通过反射调用泛型类的方法时,我得到了这个错误:

System.InvalidOperationException:无法对ContainsGenericParameters为true的类型或方法执行后期绑定操作.

有人可以帮助我找出错误在哪里吗？这将不胜感激

这是代码(我试图简化它):

public class MapClass<SourceType, DestinationType>
{

    public string Test()
    {
        return test
    }

    public void MapClassReflection(SourceType source, ref DestinationType destination)
    {
        Type sourceType = source.GetType();
        Type destinationType = destination.GetType();

        foreach (PropertyInfo sourceProperty in sourceType.GetProperties())
        {
            string destinationPropertyName = LookupForPropertyInDestinationType(sourceProperty.Name, destinationType);

            if (destinationPropertyName != null)
            {
                PropertyInfo destinationProperty = destinationType.GetProperty(destinationPropertyName);
                if (destinationProperty.PropertyType == sourceProperty.PropertyType)
                {
                    destinationProperty.SetValue(destination, sourceProperty.GetValue(source, null), null);
                }
                else
                {

                       Type d1 = typeof(MapClass<,>);
                        Type[] typeArgs = { destinationProperty.GetType(), sourceType.GetType() };
                        Type constructed = d1.MakeGenericType(typeArgs);

                        object o = Activator.CreateInstance(constructed, null);

                        MethodInfo theMethod = d1.GetMethod("Test");

                        string toto = (string)theMethod.Invoke(o,null);

                }
                }
            }
        }


    private string LookupForPropertyInDestinationType(string sourcePropertyName, Type destinationType)
    {
        foreach (PropertyInfo property in destinationType.GetProperties())
        {
            if (property.Name == sourcePropertyName)
            {
                return sourcePropertyName;
            }
        }
        return null;
    }
}

Answer 1

您需要调用GetMethod构造的类型constructed,而不是类型定义d1.

// ...

Type d1 = typeof(MapClass<,>);
Type[] typeArgs = { destinationProperty.GetType(), sourceType.GetType() };
Type constructed = d1.MakeGenericType(typeArgs);

object o = Activator.CreateInstance(constructed, null);

MethodInfo theMethod = constructed.GetMethod("Test");

string toto = (string)theMethod.Invoke(o, null);

// ...