user31673 user31673 - 3 months ago 17
C# Question

Pass Method as Parameter using C#

I have several methods all with the same signature (parameters and return values) but different names and the internals of the methods are different. I want to pass the name of the method to run to another method that will invoke the passed in method.

public int Method1(string)
{
... do something
return myInt;
}

public int Method2(string)
{
... do something different
return myInt;
}

public bool RunTheMethod([Method Name passed in here] myMethodName)
{
... do stuff
int i = myMethodName("My String");
... do more stuff
return true;
}

public bool Test()
{
return RunTheMethod(Method1);
}


This code does not work but this is what I am trying to do. What I don't understand is how to write the RunTheMethod code since I need to define the parameter.

Answer

You can use the Func delegate in .net 3.5 as the parameter in your RunTheMethod method. The Func delegate allows you to specify a method that takes a number of parameters of a specific type and returns a single argument of a specific type. Here is an example that should work:

public class Class1
{
    public int Method1(string input)
    {
        //... do something
        return 0;
    }

    public int Method2(string input)
    {
        //... do something different
        return 1;
    }

    public bool RunTheMethod(Func<string, int> myMethodName)
    {
        //... do stuff
        int i = myMethodName("My String");
        //... do more stuff
        return true;
    }

    public bool Test()
    {
        return RunTheMethod(Method1);
    }
}