C # dynamic function AmbigiousMatchException?

Question

I get an AmbigiousMatchException for a function that calls Type.GetMethod (), although everything looks pretty correct.

public partial class IBaseEvent { private Dictionary<int, Func<object[], object>> funcs = new Dictionary<int,Func<object[],object>>(); private Dictionary<int, object[]> func_args = new Dictionary<int,object[]>(); public void Execute() { int exp = 0; foreach(var func in funcs) { exp = func.GetHashCode(); func.Value.DynamicInvoke(func_args[exp]); } } public void AddFunction(Type T, dynamic sFunc, params object[] parameters) { funcs.Add(T.GetHashCode(), new Func<object[],object>(T.GetMethod(sFunc))); func_args.Add(T.GetHashCode(), parameters); } } public class DummyEvent : IBaseEvent { private string EventType = "DUMMY_EVENT"; public DummyEvent() { object[] parm = new object[3]; parm[0] = Logging.LOG_TYPE.DEBUG; parm[1] = "Hello World from DummyEvent! TypeCode: {0}"; parm[2] = typeof(DummyEvent).GetType().GUID; AddFunction(typeof(Logging.LoggingFactory), "WriteToLog", parm); } } 

Errors in AddFunction (typeof (Logging.LoggingFactory), "WriteToLog", parm);

What am I doing wrong? and how can i fix this?

Answer 1

It seems like you overly complicate things. Both the function and its argument are known when you add them to the list. You considered using anonymous functions. As an example, I wrapped this object .. the string argument in this example. DynamicInvoke will also be significantly slower.

Also, two different types can return the same GetHashCode , which, depending on your specific needs, may or may not matter.

 public partial class IBaseEvent { private Dictionary<int, Action> funcs = new Dictionary<int, Action>(); public void Execute() { foreach (var func in funcs.Values) { func(); } } public void AddFunction(Type t, Action ff) { funcs.Add(t.GetHashCode(), ff); } } public class DummyEvent : IBaseEvent { private string EventType = "DUMMY_EVENT"; private void DoSomething(string x) { Console.WriteLine(x); } public DummyEvent() { Action temp = () => { DoSomething("Hello World from DummyEvent! TypeCode"); }; AddFunction(typeof(Logging), temp); } } 

If the type is not strictly needed, you can just like that

  public partial class IBaseEvent { public Action MyAction; public void Execute() { MyAction(); } public void AddFunction(Action ff) { MyAction += ff; } } 

Answer 2

Based on the error message, I suspect that you already have the WriteToLog function in the LoggingFactory or inheritance chain.