C# Action/Function List

Question

I have a program that has to execute a function acording to a Enum and I\'m wondering If there\'s another way to it than this:

enum FunctionType
{
 Addition = 0,         


        

Answer 1

Can't say I would recommend doing this but:

public static class Functions
{
    public static Func<int, int, int> Add = (x, y) => { return x + y; };
}

Then you just call Functions.Add(1,1)

If you really have to use an enum for it then you could do:

public static class Functions
{
    public static void Add()
    {
        Debug.Print("Add");
    }

    public static void Subtract()
    {
        Debug.Print("Subtract");
    }

    public enum Function
    {
        Add,
        Subtract
    }

    public static void Execute(Function function)
    {
        typeof(Functions).GetMethod(function.ToString()).Invoke(null, null);
    }
}

Then Functions.Execute(Functions.Function.Add) (extra functions is because my enum was inside the Functions class).

Answer 2

If your functions contain same signature then you can do something like this

enum FunctionType
{
 Addition = 0,
 Substraction = 1,
 Mutiplication = 2,
 Division = 3
}
void ExecuteFunction(FunctionType Function)
{
  //variable will contain function to execute
  public Func<int, int, int> functionToExecute= null;

  switch(Function)
  {
    case FunctionType.Addition: functionToExecute=Addition;
    break;
    case FunctionType.Substraction: functionToExecute=Subsctration;
    break;      
    ...
    default: ...  
  }

  //Checking if not reached default case
  if(functionToExecute!=null)
  {
   var result= functionToExecute(para1,para2);
   ...............
  }


}