How to call an appropriate method by string value from collection?

Question

I have a collection of strings. For example,

string[] coll={\"1\", \"2\", \"3\" ...\"100\"...\"150\"...} 

and I have respective methods for th

Answer 1

Solution 1:

Use a delegate mapping. This is the faster solution.

private static Dictionary<string, Action> mapping =
    new Dictionary<string, Action>
    {
        { "1", MethodOne },
        // ...
        { "150", Method150 }
    };

public void Invoker(string selector)
{
    Action method;
    if (mapping.TryGetValue(selector, out method)
    {
        method.Invoke();
        return;
    }

    // TODO: method not found
}

Solution 2:

Use reflection. This is slower and is appropriate only if your methods have strict naming (eg. 1=MethodOne 150=Method150 will not work).

public void Invoker(string selector)
{
    MethodInfo method = this.GetType().GetMethod("Method" + selector);
    if (method != null)
    {
        method.Invoke(this, null);
        return;
    }

    // TODO: method not found
}

Answer 2

You can use dynamic invocation

 var methodName = "Method" + selector;
 var method = this.GetType().GetMethod(methodName);
 if (method == null)
 {
    // show error
 }
 else
    method.Invoke(this, null);

Answer 3

You can declare a dictionary with your keys and actions like

Dictionary<string, Action> actions = new Dictionary<string, Action>()
{
    { "1", MethodOne },
    { "2", ()=>Console.WriteLine("test") },
    ............
};

and invoke it as

actions["1"]();

PS: Presuming method void MethodOne(){ } is declared somewhere.