Question

I have a problem with reflection, basically i need to call a method of Class like this:

public Int32 addNumer (Int32 a, Int32 b)
{
    return (a+b);
}

And i need to call it with Reflection, because i receive this input from “external” C#
software and i need to evaluate witch method i need to call.

The problem is that as Input i have 2 object passed by “prompt command line”,
o I have converted it in Byte:

Byte a = 10;
Byte b = 10;

So, when i perform Refection i see an error “cannot find method addNumber”
because the method with 2 byte in input was not found. I think that it expected
2 Int32 and not 2 Byte.

How i can resolve it?

D.

UPDATE 1:

Object result_object = target_class.InvokeMember(method, 
                           BindingFlags.InvokeMethod, null, target_object, 
                           args_values, null, null, args_names);

UPDATE 2:
i can’t CAST to Int32 because i receive this call from a EXE file:

MyProjectPrompt.exe Namespace.Class.Method param1 param2

Example:

MyProjectPrompt.exe It.Company.Math.Add 10 10

SOLUTION

ParameterInfo[] listaParametr = method_to_invoke.GetParameters();

ParameterInfo infoParam;
for(Int32 va=0;va<listaParametr.Length;va++)
{
    infoParam = listaParametr[va];

    for(Int32 va2=0;va2<args_values.Length;va2++)
    {
        if(args_names[va2]==infoParam.Name)
        {
            args_values[va2] = Convert.ChangeType(args_values[va2], 
                                                  infoParam.ParameterType);                        
        }
    }
}

Basically for EVERY Param to pass, i cast it.
After that i pass it dynamically:

Object result_object = target_class.InvokeMember(method, 
                           BindingFlags.InvokeMethod, null, target_object, 
                           args_values, null, null, args_names);

Answer 1

Use Convert.ChangeType to change your original value to a type accepted by the method. It’ll throw an exception if no suitable conversion can be found.