How to pick a Function From a string

Question

I would like to make a system that when informed an integer number (Int) it performs a certain function.

Int Input > Find Object Function > Transform int in a name > executes the function with that name.

Example: It’s not a functional code

public class Main
{
    public static void AcharObjeto(int id)
    {
        for (int Type = 0; Type < Objects.ObjectsList.Length; Type++)
            if (id == Convert.ToInt32(Objects.ObjectsList[Type,1]))
               // Daqui para baixo não funciona e essa e a pergunta!!
               foreach(Obj in Objects)
               {
                   if(Obj.toString() == Objects.ObjectsList[Type,0])
                      Obj();
               }
    }
}

public class Objects
{
   public static string[,] ObjectsList = new string[1, 2] {
        { "Toalha", "1" }
   };

   public static void Toalha()
   {
      Debug.WriteLine("Toalha");
   }
}

I don’t know if you can understand but I’d like to know how to do that! I made this code on market theme like the guy goes there and reads the code, then he has to find it in a code list and assimilate it with the function that makes mark the price or something like that.

An easier way to understand:

string namefunc = "teste";
Main.namefunc();

ANSWERS IN C, PLEASE

Answer 1

There are a few ways to do this. The most common is to invoke the desired method, picking it up via Reflection.

As shown example, where the class in which the method is found is known, something like:

var funcao = TypeDaclasseOndeEstaOMetodo.GetMethod("NomeDoMetodo");
funcao.Invoke(this, null);

For that it is necessary to do using System.Reflection;.

To catch the class guy, the TypeDaclasseOndeEstaOMetodo, you can do something like var TypeDaclasseOndeEstaOMetodo = this.GetType();, assuming that both methods and where there is invoke are in the same class.

These details may vary depending on your implementation and project organization. Missing more information in the question to present something more detailed.

---

Edit: According to code presented by AP. Repl: https://repl.it/repls/ImpureBurdensomeDatasets

using System;
using System.Reflection;

class MainClass {
  public static void Main (string[] args) {
    AcharObjeto(1);
  }

  public static void AcharObjeto(int id)
  {
    for (int Type = 0; Type < Objects.ObjectsList.GetLength(0); Type++)
    {
      if (id == Convert.ToInt32(Objects.ObjectsList[Type, 1]))
      {
        var ObjectsType = typeof(Objects);
        var funcao = ObjectsType.GetMethod(Objects.ObjectsList[Type,0]);
        funcao.Invoke(null, null);

        break;
      }
    }
  }
}

public static class Objects
{
   public static string[,] ObjectsList = new string[1, 2] {
        { "Toalha", "1" }
   };

   public static void Toalha()
   {
      Console.WriteLine("Toalha");
   }
}

Answer 2

In the example you wrote you are trying to directly invoke the object when you actually wanted to call a function of it. The following example creates an object through the Activator.Createinstance and then invokes a method named after it. I used the example method you provided:

   public static void AcharObjeto(int id)
{
  for (int Type = 0; Type < Objects.ObjectsList.Length-1; Type++)
    if (id == Convert.ToInt32(Objects.ObjectsList[Type, 1]))
      foreach (var Obj in Objects.ObjectsList)
      {
        if (Obj.ToString() == Objects.ObjectsList[Type, 0])
        {
          var objType = typeof(Objects);
          var funcao = objType.GetMethod(Obj);
          object objectInstance = Activator.CreateInstance(objType, new object[] { });
          funcao.Invoke(objectInstance, null);
        }
      }
}

I ran and it works fine.

   public static void Main() {
    AcharObjeto(1);
   }