Hi,
in the code sample that follows how do i get from the MethodInfo object given the variable name 'method' in main (this method takes a string as its parameter) to the MethodInfo object that took the generic parameter in the class MyGeneric (i.e. the MethodINfo that originally described the method) I would guess by using MethodInfo.GetGenericMethodDefintion() but is says this isn't allowed due top the state of the object. I think i would be nearer to understanding my problem if i knew why IsGenericMethod is returning false below when i think it should be true... (IsGenericMethodDefiniton is also false).
thanks in advance, colin
using
System;using
System.Reflection;using
System.Collections.Generic;namespace
AnotherTest { public class MyGeneric<K>{ public bool ContainsKey(K key) { return false;}
}
class MainClass{ public static void Main(String[] args){ Type testType = typeof(MyGeneric<String>); Console.WriteLine("is generic type " + testType.IsGenericType); MethodInfo method = testType.GetMethods()[0]; Console.WriteLine("is generic method " + method.IsGenericMethod); Console.Read();}
}
}
confused by generic methods
scokim
The method isn't generic.
The following class contains a generic method.
public class ContainsGenericMethod
{
void GenericMethod<T>(T value)
{
}
}
Sentme
actually, i'm not so sure i can...
I can get the GenericTypeDefinition (MyGeneric in the example) and then i could use GetMethod(name, parameters) to get the original MethodInfo - if i knew which parameters to use. In other words how do i get back the signature for the method in the open generic
I can get the generic arguments of the open generic and can get the generic arguments of the closed generic, I could then swap the types over. e.g. swap type String for type K in my original example.
However, i cannot assume that all type String parameters in a method should be swapped for type K parameters. How do i know whether or not a parameters Type was changed as a result of binding the open generic to certain types
I hope somebody has followed that :)
col
Mr_Mod
Hi, yes - thanks for the response.
So how do you describe the relationship between the method I'm reflecting over ('MemberInfo method') and the method in the class i called MyGeneric
Clearly they are related - if i add
foreach
(ParameterInfo param in method.GetParameters()) { Console.WriteLine(method.Name + "\t" + param.Name + "\t" + param.ParameterType);}
to the end of the main method i can see the parameter has changed to a String.
How do i get back to the MethodInfo that orignally described it
cheers,
colin
Dinesh Kumar M.G
You can problably use the methods and properties described on this page: Generics and Reflection (C# Programming Guide) .
Peter S Antal - MSFT