I am currently doing some R&D. The objective is to learn how to invoke
methods via reflection using the InvokeMember method. The InvokeMember
method throws an exception:
Method 'ReflectionTest .Originator.Add ToA' not found.
Here is the code:
using System;
using System.Diagnost ics;
using System.Collecti ons.Generic;
using System.Reflecti on;
using System.Text;
namespace ReflectionTest
{
public class Originator
{
private int a;
public Originator(int a)
{
this.a = a;
}
public int AddToA(int value)
{
a += value;
return a;
}
}
public class Program
{
static void Main(string[] args)
{
object obj = new Originator(5);
BindingFlags flags =
BindingFlags.Pu blic |
BindingFlags.In vokeMethod |
BindingFlags.In stance;
object result = obj.GetType().I nvokeMember(
"AddToA", flags, null, obj, new object[] { "5" });
Debug.WriteLine (result.ToStrin g());
}
}
} 3 6562
<ca******@gmail .com> wrote: I am currently doing some R&D. The objective is to learn how to invoke methods via reflection using the InvokeMember method. The InvokeMember method throws an exception:
<snip>
public int AddToA(int value)
<snip>
object result = obj.GetType().I nvokeMember( "AddToA", flags, null, obj, new object[] { "5" });
You're effectively trying to call AddToA("5").
"5" is not an int, it's a string. If you change "5" to 5, the code
works.
--
Jon Skeet - <sk***@pobox.co m> http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too
> I am currently doing some R&D. The objective is to learn how to invoke methods via reflection using the InvokeMember method. The InvokeMember method throws an exception:
Method 'ReflectionTest .Originator.Add ToA' not found.
Here is the code:
using System; using System.Diagnost ics; using System.Collecti ons.Generic; using System.Reflecti on; using System.Text; namespace ReflectionTest { public class Originator { private int a; public Originator(int a) { this.a = a; } public int AddToA(int value) { a += value; return a; } } public class Program { static void Main(string[] args) { object obj = new Originator(5); BindingFlags flags = BindingFlags.Pu blic | BindingFlags.In vokeMethod | BindingFlags.In stance; object result = obj.GetType().I nvokeMember( "AddToA", flags, null, obj, new object[] { "5" }); Debug.WriteLine (result.ToStrin g()); } } }
Changing the line:
object result = obj.GetType().I nvokeMember(
"AddToA", flags, null, obj, new object[] { "5" });
to
object result = obj.GetType().I nvokeMember(
"AddToA", flags, null, obj, new object[] { 5 });
should do it. I didn't test it though.
>Method 'ReflectionTest .Originator.Add ToA' not found.
.... object result = obj.GetType().I nvokeMember( "AddToA", flags, null, obj, new object[] { "5" });
The argument you're providing is a string so it will look for a
AddToA(string) method, not your AddToA(int). Try changing "5" to 5.
Mattias
--
Mattias Sjögren [C# MVP] mattias @ mvps.org http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
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