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。
有人可以帮我解决故障的原因吗?非常感谢
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;
}
}
答案 0 :(得分:17)
您需要在类型定义GetMethod
上的构建类型constructed
,不上调用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);
// ...